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Introduction
Technical Handbook
UK GSM-R Cab Radio
666/HH/86219/000 Issue 1.0 Page i
Preliminary Pages
Document No: 666/HH/86219/000
Issue 1.0
July 2007
Preliminary Pages
666/HH/86219/000 Issue 1.0 Page ii
SAFETY SUMMARY
ELECTRICAL SAFETY The Cab Radio (Voice) equipment complies with relevant statutory safety legislation, including the EU Low Voltage Directive 73/23/EEC and EN60950. Equipment operators are protected from potentially hazardous voltages within the GSM-R Cab Radio enclosure by a number of earthed panels. All accessible metal parts of the enclosure are electrically connected to an earth stud, allowing the enclosure to be connected to train chassis. Neither the driver's Control Head, nor the Handset contain any hazardous voltages. The base of the GSM-R roof-mounted Antenna is electrically connected to the train roof. The outer braid of each Antenna cable is connected to the train chassis at both ends. This provides protection for any persons who may be in physical contact with the GSM-R Cab Radio equipment should any of the Antenna come into contact with a high voltage source, such as an overhead catenary. Hazardous voltages are not present within other components of the GSM-R Cab Radio. MATERIAL SAFETY Use of materials which could pose a health and safely risk, either under normal or abnormal conditions, has been carefully controlled during the design of the GSM-R Cab Radio equipment. Any such materials used are listed within this handbook. The Cab Radio equipment has been designed and constructed so that, as far as is reasonably practicable, the risk of ignition and fire development - under both normal and abnormal operating conditions - is minimised. NOISE No part of the GSM-R Cab Radio equipment will emit a noise level within the normal audio range, in excess of 130dBA for a period of greater than 0.125 seconds. PERFORMANCE SAFETY The GSM-R Cab Radio complies with the EU EMC Directive89/336/EEC.
Preliminary Pages
666/HH/86219/000 Issue 1.0 Page iii
CONTENTS
INTRODUCTION.................................................................................................................................. 1
1 Introduction ................................................................................................................................ 2
GSM–R CAB RADIO SYSTEM DESCRIPTION ........................................................................................ 3
2 GSM-R Cab Radio System Description......................................................................................... 4 2.1 Siemens GSM-R Cab Radio Overview .......................................................................................... 4 2.2 GSM-R Cab Radio System Interfaces............................................................................................ 8 2.2.1 External Interfaces .................................................................................................................. 8 2.2.2 Internal Interfaces................................................................................................................... 8 2.3 Hardware .................................................................................................................................. 8 2.4 Connectors and Interfaces.......................................................................................................... 9 2.4.1 Connectors ............................................................................................................................. 9 2.4.2 Interfaces to External Equipment .......................................................................................... 10
CAB RADIO DETAILED DESCRIPTION ................................................................................................ 11
3 Cab Radio Detailed Description................................................................................................. 12 3.1 General ................................................................................................................................... 12 3.2 Radio Transceiver..................................................................................................................... 12 3.3 Cab Radio Internal Power Supplies............................................................................................ 14 3.4 Printed Circuit Boards............................................................................................................... 15 3.4.1 General ................................................................................................................................ 15 3.4.2 PC104 Logic Stack Assembly ................................................................................................. 15 3.4.3 Input/Output PCB.................................................................................................................. 21 3.4.4 Audio PCB............................................................................................................................. 22 3.4.5 Power Supply (PSU) PCB........................................................................................................ 24 3.4.6 Backplane PCB ...................................................................................................................... 26 3.4.7 Connector PCB...................................................................................................................... 27 3.4.8 PA PCB.................................................................................................................................. 28 3.4.9 MVB Interface PCB (Optional) ................................................................................................ 28 3.5 Gland Box ................................................................................................................................ 29 3.6 4 Line Drivers Control Panel ..................................................................................................... 30 3.6.1 Controller PCB....................................................................................................................... 30 3.6.2 Power Supply........................................................................................................................ 31 3.6.3 Microcontroller ..................................................................................................................... 31 3.6.4 RS422 Converter................................................................................................................... 31 3.6.5 Backlighting Control ............................................................................................................. 31 3.6.6 Keypad Interface................................................................................................................... 31 3.6.7 VFD Interface........................................................................................................................ 31 3.6.8 Keypad PCB........................................................................................................................... 32 3.6.9 Display ................................................................................................................................. 32 3.7 Handset................................................................................................................................... 32 3.8 Loudspeaker ............................................................................................................................ 32 3.9 UPS ......................................................................................................................................... 33 3.10 Train Mounted Antenna ......................................................................................................... 33 3.11 RF Cabling ............................................................................................................................. 35
Preliminary Pages
666/HH/86219/000 Issue 1.0 Page iv
SOFTWARE ARCHITECTURE.............................................................................................................. 36
4 Software Architecture............................................................................................................... 37 4.1 General ................................................................................................................................... 37 4.2 Design Rationale...................................................................................................................... 37 4.3 Software Systems .................................................................................................................... 38 4.4 Control of External Interfaces ................................................................................................... 38 4.5 Human Machine Interface........................................................................................................ 39 4.6 Digital Interface ....................................................................................................................... 39 4.7 GSM-R Interface....................................................................................................................... 39 4.8 PMU Interface.......................................................................................................................... 39 4.9 TCP Interface ........................................................................................................................... 39
APPROVALS...................................................................................................................................... 40
5 Approvals .................................................................................................................................. 41 5.1 Environemental Performance................................................................................................... 41 5.2 EMC......................................................................................................................................... 42 5.3 Safety Testing.......................................................................................................................... 42 5.4 EIRENE Approval ...................................................................................................................... 43 5.5 BANNED/ TOXIC MATERIALS ..................................................................................................... 43
Preliminary Pages
666/HH/86219/000 Issue 1.0 Page v
LIST OF ABBREVIATIONS
AMP Ampere
ARINC Aeronautical Radio Incorporated
AT Attention
BR British Rail
CE European Community
CLI Calling Line Identity
COTS Commercial – Off the Shelf
DC Direct Current
DCP Drivers Control Panel
DIP Dual Inline Processing
DSD Driver Safety Device
DUART Dual Universal Asynchronous Receiver & Transmitter
EIRENE European Integrated Railway (Radio) Enhanced Network
EMC Electro Magnetic Compatibility
ESD Electrostatic discharge
ETCS European Train Control System (also known as EVC)
EVC European Vital Computer (also known as ETCS)
FRS Functional Requirements Specification
GPS Global Positioning System
GSM-R Global System for Mobile Communications - Railways
GSM-P Global System for Mobile Communications - Public
HCT High Speed CMOS, TTL compatible
HMI Human – Machine Interface (also known as MMI and DCP)
H/W Hardware
Hz Hertz
I/F Interface
I/O Input/Output
I/P Input
IP Environmental Protection factor or Internet Protocol
JRU Juridical Recording Unit or (also known as OTMR)
kbps Kilobits per sec
LAN Local Area Network
MMI Man Machine Interface (also known as HMI and DCP)
MT Mobile Termination
MVB Multi function Vehicle Bus
OEM Original Equipment Manufacturer
O/p Output
OTMR On Train Monitoring Recorder (also known as JRU)
PA Public Address
PCB Printed Circuit Board
Preliminary Pages
666/HH/86219/000 Issue 1.0 Page vi
PMU Portable Maintenance Unit
PSU Power Supply Unit
PTT Press to Talk
R&TTE Radio and Telecommunications Terminal Equipment
RAM Random Access Memory
RF Radio Frequency
RMS Root mean squared
RS232 etc Serial Data Format Protocol
Rx Receiver
SDL Specification and Description Language
SIM Subscriber Identification Module
SDL Software Development Library
SRS System Requirements Specification
SSFS Sub System Functional Specification
TBR Train Borne Recorder
TCP Transmission Control Protocol
TTL Transistor – Transistor Logic
UART Universal Asynchronous Receiver & Transmitter
UML Unified Modelling Language
µP Micro-Processor
UML Unified Modelling Language
UPS Uninterruptible Power Supply
VDR Voltage Dependent Resistor
VFD Vacuum Fluorescent Display
Preliminary Pages
666/HH/86219/000 Issue 1.0 Page vii
ASSOCIATED DOCUMENTATION
Refer to the following publications for additional information on the equipment described
in this handbook:
No. Publication Document Number
1 Cab Radio – User Guide 666/HB/60024/003
2 Cab Radio –Maintenance Handbook 666/HA/62078/000
3 Interface Control Document 666/UJ/86001/000
4 EIRENE SRS V 14.0 CLA111D004
5 EIRENE FRS V 6.0 CLA111D003
666/HH/86219/000 Issue 1.0 Page 1
Introduction
INTRODUCTION
666/HH/86219/000 Issue 1.0 Page 2
Introduction
1 Introduction
This handbook gives a technical description of the UK GSM-R Cab Radio
Equipment as supplied to Network Rail by Siemens Transportation Systems.
The equipment comprises:
• Siemens GSM-R Cab Radio transceiver.
• One (or two) separate Drivers Control Panels.
• One (or two) handsets with PTT switch and cradle.
• One (or two) loudspeakers.
• A roof mounted antenna.
• Connecting RF cabling.
This handbook gives technical details of user functions but does not describe
how to make use of them. The User Handbook (see Associated Document 1)
should be referred to for those details.
Also Maintenance activities are the subject of the maintenance handbook (see
Associated Document 2).
666/HH/86219/000 Issue 1.0 Page 3
Cab Radio Detailed Description
GSM–R CAB RADIO SYSTEM DESCRIPTION
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 4
2 GSM-R Cab Radio System Description
2.1 SIEMENS GSM-R CAB RADIO OVERVIEW
The Siemens UK GSM-R Cab Radio supplied to Network Rail provides voice
communications between trains and ground based organisations and personnel.
The equipment is compliant with EIRENE standards namely Eirene FRS
(Functional Requirement Specification, version 6) and SRS (System
Requirements Specification, version 14).
The Cab Radio consists of 3 main assemblies:
a) The Cab Radio Transceiver Unit.
Fig 1 - The Cab Radio Transceiver Unit
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 5
b) The Drivers Control Panel(s) and associated handset and loudspeaker.
Fig 2 - Drivers Control Panel, handset and loudspeaker
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 6
c) One antenna to suit the particular Vehicle.
Fig 3 – Example Antenna
The radio is enclosed within a metal housing and the Drivers Control Panel is a
standalone enclosure. The radio assembly is fitted to the train using brackets
which are normally custom to a particular train class, and connects to the train
via a ‘gland box’ assembly that is mated with a multi way connector on the radio
enclosure. All connections to the radio are made via the multiway connector
with the exception of the RF connection for which there is an N type connector
on the rear panel of the radio enclosure. The radio can easily be removed or
replaced by removal of the gland box (4 bolts), removal of the radio brackets
and removal of the N type connector.
The Cab Radio Transceiver Unit houses the GSM-R radio transceiver, a set of PCBs
and power supplies. The power supply module converts the train power to
levels required by the circuits within the radio unit.
The Drivers Control Panel contains a 4 line display screen, normal telephone dial
keys, direct dial and special function keys. A telephone handset and separate
loudspeaker are connected into the rear of the assembly to complete the Cab
equipment.
The UK GSM-R cab radio installation is shown in Fig 4. Dotted lines indicate optional supply items.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 7
Fig 4 - Typical GSM-R Cab Radio Installation
GSM-R Cab Radio Unit
GPS Rx & Antenna
JRU
Driver's Key Switch
(Cab 1 & 2)
PA
DSD (Cab 1 & 2)
Train Supply
Cab Equipment 1
Cab Equipment 2
Diagnostics Terminal (PMU)
UPS
GSM-R Antenna
GPS Power Supply Unit
Train Supply
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 8
2.2 GSM-R CAB RADIO SYSTEM INTERFACES
2.2.1 External Interfaces The GSM-R Cab Radio system interfaces with the following:
• Train systems:
o The Driver Safety Device (DSD).
o The Public Address (PA) system.
o Driver’s Key.
o Fax.
o EVC.
o JRU / OTMR (H/W interface).
• Train Power Supply.
2.2.2 Internal Interfaces The key elements of the cab radio are:
• The Cab Radio unit incorporating DC-DC converters and PCB’s.
• The Drivers Control Panel(s).
• The Handset(s).
• The Loudspeaker(s).
• The GSM-R Antenna.
• The GPS Transceiver and Antenna (Option).
• UPS (Option).
• PMU (External to the radio).
A full list of interfaces can be found in the Interface Control Document (see
Associated Document 3).
2.3 HARDWARE
The radio assembly enclosure main components are:
• The GSM-R Transceiver Unit (containing a SIM module to provide vehicle
identity). This provides the radio functions required to communicate with
the GSM-R network.
• DC-DC Converter Power Supply Units (PSU) these convert the train supply
voltage into voltage levels suitable for powering the cab radio modules.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 9
• Logic PCB: This provides an interface to the processor via a PC104 standard
bus. It handles the audio switching, level adjustment, and routing
between the various interfaces. It also provides the serial data interfaces.
• Processor PCB: This is a PC104 standard module, located as a daughter
board on the Logic card. This board holds the memory and runs the Voice
Cab Radio application software. It communicates with the GSM-R
transceiver, logic card, HMI and external equipment via the I/O devices.
• Input/Output (I/O) PCB: This provides a number of digital inputs and
outputs (both train voltage and low voltage) for connection to other
components of the Voice Cab Radio and to other train equipment.
• Audio PCB: This provides the audio power amplifiers for the driver’s
loudspeaker(s) and handset(s).
• PA PCB: Provides the amplifiers and interface to the PA system.
• Interconnection PCBs.
External to the enclosure are:
• The rooftop antenna.
• One (or two) Drivers Control Panels.
• One (or two) Drivers Handsets.
• One (or two) Drivers Loudspeakers.
• RF cables connecting the radio assembly to the rooftop antenna.
• Cables connecting the Cab Mobile to the train and on train systems.
2.4 CONNECTORS AND INTERFACES
2.4.1 Connectors The connection between the radio assembly and the vehicle mounted cassette is
by way of an ARINC connector with 3 inserts. ARINC connector details are
defined in the Interface Control Document (See Associated Document 3).
There is a facility on both the front and rear face of the Cab Mobile enclosure to
connect a Portable Maintenance Unit. The PMU is for use by installers and
maintainers for both installation and commissioning and diagnostic purposes.
The PMU is not used by drivers. Driver Maintenance Functions are limited to
using the self test button, and responding correctly to errors identified as a
result of the radio’s background self testing. The radio offers a “Maintenance”
menu which contains additional diagnostic tools to allow a maintainer to
perform diagnostic tests without the use of a PMU.
The Drivers Control Panel(s), handset(s) and loudspeaker(s) are connected to
the rear of the radio assembly through the ARINC Connector.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 10
Earthing The cab radio cassette has an external M6 stud that is connected to an earth
point close by on the train chassis when the radio is installed.
2.4.2 Interfaces to External Equipment The interfaces to the Cab Radio are shown below:
Items shown with a * are available in hardware only, software interfaces are not
available.
The interfaces to external equipment are:
• RS232 interface for the PMU.
• RS422 and RS485 interfaces for:
o HMI.
o EVC / ETCS.
o Fax.
o (*JRU / OTMR).
• Low voltage inputs for the handset and UPS control lines.
• Train Power Supply.
• Train Voltage inputs and outputs (DSD, Drivers Key).
• PA.
• (*LAN Interface - Ethernet).
MMI 1
GSM-R Antenna
SVR400 Cab Radio
PMU (RS232)
Train Power Supply
EVC/ETCS, Fax, JRU/OTMR (RS422 / RS485)
LAN I/F (ethernet)
MMI 2
Digital Inputs Train Voltage
(6 off)
Digital OutputsTrain Voltage
(5 off)
RS422 Data Power
Supply
Audio
PTT, Hook Switch
UK PA (5V or 40V)
RS422 Data
Audio
PTT, Hook Switch
UPS Power Supply
Battery On Battery Low
Power Supply
Fig 5 – Interfaces to external equipment
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 11
CAB RADIO DETAILED DESCRIPTION
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 12
3 Cab Radio Detailed Description
3.1 GENERAL
The Cab Radio Transceiver Unit is broken down into the following sections:
• Radio Transceiver.
• Internal Power Supplies.
• Printed Circuit Boards.
• Gland Box.
Following this is a description of the control panel, handset, loudspeaker, UPS, antenna and RF cabling.
3.2 Radio Transceiver
The UK Cab Radio contains an integral OEM GSM-R radio transceiver. The main characteristics of this unit are:
• OEM Type Approved, to the EU R&TTE Directive, GSM-R radio transceiver
with SIM card reader capable of operating in both the GSM-R and GSM-P
frequency bands.
• The transceiver fitted may be either a Sagem or Kapsch device.
• ‘Eurocard’ style, sub-rack compatible construction.
• Compliant to EIRENE specifications, including required optional
features.
• Supports Full Duplex Voice communication.
• Supports Full Duplex Data communication.
• Class 2 (8-Watt) Transmitter.
• Asynchronous Serial Port (full H/W handshaking) using ‘AT’ commands
according to GSM 07.07 and GSM 07.05. This interface is connected via
the transceiver unit’s backplane connector. Note that the Sagem
transceiver provides a HCT compatible interface, whereas the Kapsch
transceiver has an RS232/422 compatible interface.
• 4 wire audio interface port located at the transceiver unit’s backplane
connector.
• A 50Ω TNC RF connector.
• A temperature warning output. Support of CLI identification (via Serial
Port) and call type for incoming voice and data calls.
• No limitation on the duration of one-to-one calls to or from the Radio.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 13
The unit connects to other Cab Radio hardware via the backplane connector.
The Radio Transceiver is controlled via AT commands sent from the Processor
PCB over an asynchronous serial data interface and incorporates a SIM card
reader. The SIM card can be programmed with independent data, e.g. Vehicle
ID Number.
The serial link is also used to provide an indication of the level of the signal
currently being received.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 14
3.3 CAB RADIO INTERNAL POWER SUPPLIES
The power supply consists of two major components. A eurocassette style DC-DC converter and a separately mounted Power Supply PCB (see section 3.4.5).
If the train Voltage is greater than 24V it is fed through a Switched Regulator module fitted to the PSU PCB and then through a DC-DC converter which provides two 13V Supply rails. If the train Voltage is 24V or less, it is fed straight into the DC-DC converter. The Switching Regulator and DC-DC Converter both provide transient protection and filtering. One 13V DC rail is used within the Radio assembly, the second 13V(I), produces an isolated 13V supply which is used to provide power to the cooling fans, and power outside the Radio assembly, e.g. to the MMIs.
The 13V supply to the ‘Sagem’ radio is routed via a diode in order to reduce the supply level to approximately 12.3V.
The 13V rails are themselves connected to two 13-5V DC-DC converters (located on the PSU PCB) to supply the various PCB’s.
Switched Regulator
Train Voltage DC-DC
Converter
13V to 5V DC-DC
13V(I) to 5V(I)
DC-DC
Train V (Other than
24V)
Train V (24V)
13V to Logic, I/O, PA, Radio TRx
12.3V to Sagem Radio
0V Reference
0V Reference
5V to Logic, PC104 stack, I/O,
Kapsch Radio
5V(I) to Logic
0V(I) Reference
13V(I) to MMIs
Output 1
Output 2
13V(I) to Internal Fans
Fan Enable 13V(I) to External Fans
13V(I) to UPS
Power Supply PCB
Fig 6 – Power Supply Distribution
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 15
3.4 PRINTED CIRCUIT BOARDS
3.4.1 General The Cab Radio Transceiver unit includes the following PCBs:
• The PC104 Logic Stack assembly comprising:
o The Processor PCB.
o The Logic PCB.
o MVB PCB (*can be fitted as a future option).
• Input/Output PCB.
• Audio PCB.
• Backplane PCB.
• Connector PCB.
3.4.2 PC104 Logic Stack Assembly
3.4.2.1 PROCESSOR PCB
Fig 7 – Processor Board
The Processor PCB provides the main processing and functional control facility
for the GSMR Voice Cab Radio, and is based on the PC104 standard. It is a COTS
Processor
RS232 Serial Ports x 4
Ethernet LAN Port
Floppy / Hard Disk Controller
Sound Processor
Watchdog
Random Access
Memory
Real Time Clock
Non Volatile Memory
(Application Code) Bank 1
Non Volatile Memory
(Application Code) Bank 2
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 16
board that is mounted on the Logic card. The PCB receives power from, and
communicates with its host Logic PCB via the PC104 bus connector.
The Processor PCB provides four RS-232 serial data ports, which support a data
transfer rate of up to 115kbps with full handshaking capability. In addition, the
PCB is capable of simultaneously supporting data transfer to and from the serial
interfaces provided by the Logic Interface PCB.
The on-chip memory is capable of storing two versions of the application code
and application database information. The PCB provides a facility that allows
serial download of information to the on-chip memory via one of its RS-232
ports. The version of application code which is not in use can be overwritten
using the PMU which is connected to a serial interface.
The PCB provides interfaces, which allow connection of an external floppy disk
drive or hard disk drive. These interfaces are used during equipment
development, but are not be connected during normal use.
The microprocessor is capable of being configured to either initialise using
routines stored within non-volatile memory or from a connected disk drive.
In addition, it is possible to store downloadable data from the Ground System
(e.g. text messages etc) into the Disk on Chip, without reprogramming the
application code. This is achieved by using a “flash-file” system, i.e. the flash
memory emulates a solid state disk.
A watchdog circuit is provided on the microprocessor PCB. In the event of a
failure which resulted in the software running out of control, a microprocessor
reset is forced, allowing the system to restart into a known state.
The microprocessor PCB is also equipped with a sound chip, allowing the PCB to
process .WAV files for generation of tones, in accordance with Eirene. These
tones will then be output, in the form of an analogue – LINE OUT - signal, to the
Logic PCB.
The LAN ethernet port (hardware provision only), resides on this PCB.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 17
3.4.2.2 LOGIC PCB
A block diagram of the Logic PCB is shown on the next page.
The Logic PCB provides the following functionality :
• An interface to the PC104 Bus and a physical mount for the PC104 PCB
stack.
• A changeover circuit to direct audio, alert tones, PTT and Hookswitch
signals to/from the set of MMI which is in use (dependent upon state of
driver’s key inputs).
• Audio interfaces, signal level adjustment & audio signal routing for the
following:
o Audio input from GSM-R Radio Transceiver.
o Audio input from Microprocessor PCB (alert tones).
o Audio input from the Driver’s MMI equipment (Microphone).
o Audio output to GSM-R Transceiver.
o Audio outputs to the Driver’s MMI (Earpiece and Loudspeaker).
o Alert tone output to the Driver’s MMI (mixed into Loudspeaker output).
o Audio output to the Train PA System.
• 7 off RS422 serial data interface circuits, each providing electrical isolation
and transient protection. Two of these are used to connect to the MMIs.
The remaining are reserved for interfaces to equipments that are not
supported on the UK Cab Radio. Two of these are capable of being
configured as RS485.
• 1 non-isolated RS232 serial interface circuit, which are used to provide
connection for the PMU.
• 1 HCT serial data interface circuit, providing a communication path
between the microprocessor PCB and the GSM-R radio transceiver unit.
• Routing for the Ethernet interface provided by the PC104 microprocessor
PCB to the Connector PCB. Volume Control circuit for the external radio
equipment
• Hardware reset circuit for the Cab Radio microprocessor and radio
transceiver.
• Low Voltage (13V) actuated, optoisolated inputs for
• The PTT & Hookswitch signals from each MMI.
• Reset signal.
• Cradleswitch inputs for each handportable radio .
• A Low Voltage (13V) output contact providing a PTT signal to the external
analogue radio.
666/HH/86219/000 Issue 1.0B Page 18
Cab Radio Detail Description
Fig 8 – Logic PCB Block Diagram
PC104 Bus
PC104 Interface
Tone Input
Audio Level Commoning
Cross Point
Switch
Audio Level Adjustment
Audio Output to PA
Control & Data Lines to I/O PCB, PA PCB & Audio PCB
Audio Input from Mic
Audio I/P from GSM-R Radio
Audio to GSM-R Radio
Audio Output to Earphone
DUART Isolation HCT–RS422 Conv. RS422 I/Fs 2
HCT–RS422 or RS422/485
Conv.
RS422 I/F
Routing of Ethernet Interface
Audio Output to Loudspeaker
2
Quad UART
Isolation 3 3
From Audio PCB
Audio Output to Intercom
Reset 1
Reset 2
Reset Logic & Timer
Reset Signal to μP & GSM-R
Radio
LS Speech
LS Tones
To Audio PCB
PTT 2
Hook Switch 2
RS422/485 I/Fs
TTL – RS422 Conv.
TTL – RS232 Conv.
COM Ports (μP)
RS422 I/F
2Isolation
2
TTL – RS422 Conv. RS422 I/F
GSM-R Radio
PMU/ TRx Download
PTT 1
Hook Switch 1
Reset (to Cab Radio)
666/HH/86219/000 Issue 1.0B Page 19
Cab Radio Detail Description
Audio Routing
The Logic PCB provides audio routing between the following audio inputs:
• Audio input from the Driver’s Microphone.
• Microprocessor PCB sound output - for provision of alert tones.
• Audio input from the GSM-R radio transceiver (provided with software
controllable gain, using a digital potentiometer).
It also routes to the following audio outputs:
• Audio output to the Driver’s Loudspeaker.
• Tone output to the Driver’s Loudspeaker.
• Audio output to the Driver’s Earpiece.
• Audio output to the GSM-R radio transceiver (provided with software
controllable gain, using a digital potentiometer).
• Audio output to the Train PA.
Audio inputs to the Logic PCB are provided via isolation transformers, located
on other PCBs. Audio signals entering the Logic PCB are amplified to a
common level prior to being fed into a cross-point switch.
This cross-point switch connects audio inputs to audio outputs. This is
controlled by the PC104 microprocessor PCB, via the PC104 interface.
The various audio output signals from the cross-point switch are then
adjusted, according to the level required by the audio device to which they
are connected. Audio outputs are provided with isolation transformers, again
located on other PCBs.
The audio circuits on the Logic PCB ensure a flatness tolerance of +1, -3dB
across the frequency range 300Hz to 3kHz at each audio output.
Serial Interface to GSM-R Radio
An RS232 to HCT logic converter allows communication between the
Processor PCB, via one of its serial ports, and the Radio Transceiver, via its
backplane connector.
Serial Interface Translation and Isolation
The Logic PCB provides translation from RS232, as provided by the Processor
and Serial Interface PCBs, and RS422/RS485, as required for connection to the
external equipment.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 20
The RS232 Processor PCB to PMU interface is also routed through the Logic
PCB, allowing transient and ESD protection to be fitted.
PMU Interface/Radio Transceiver Service Interface
This allows the external PMU connector to be used to connect the PMU for
Cab Radio software updates or system monitoring, or to allow radio
transceiver firmware to be updated, without the need to remove panels from
the Cab Radio.
Cross-Point Switch
This allows the various audio inputs to the Cab Radio unit to be connected
through to the required audio output, under the control of the PC104
Microprocessor PCB.
Individual switches within the cross-point switch can be closed or opened
under software control. To do this, the microprocessor selects the ‘address’ of
the required switch and sets a ‘data’ bit to logic ‘1’ or ‘0’.
PC104 Bus Interface
This provides address decoding and data bus control, which controls the flow
of data between the Logic PCB and the Microprocessor PCB.
On the logic PCB, the PC104 interface provides address and data bits to the
cross-point switch, allowing audio routing through the PCB to be controlled
by the microprocessor.
Data transfer between the Microprocessor PCB, the PA PCB and the I/O PCB is
also routed through the Logic PCB and is controlled at this interface. The
interface allows the microprocessor to control the state of the digital outputs
and read the state of the digital inputs on these PCBs.
DUART
A dual channel UART is provided, which communicates with the
Microprocessor PCB via the PC104 interface. The device provides two serial
data channels, which supplements those provided from the microprocessor
PCB.
Both these data interfaces have isolation to be provided between the DUART
and the respective data transceivers.
Both of these data interfaces appear externally as RS422.
Cab Radio Detail Description
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Quad UART
This provides a further 3 serial interfaces and communicates with the
Microprocessor PCB via the PC104 interface, in a similar fashion to the DUART.
All three of these data interfaces are provided with isolation between the
UART and the respective data transceivers.
All three appear externally as RS422, with two interfaces capable of being
hardware configured as RS485.
3.4.3 Input/Output PCB The I/O PCB provides:
• 6 digital inputs operated from train voltage.
• 5 digital outputs which are capable of switching the train voltage.
The state of these Digital Inputs is made available to the Microprocessor PCB via the PC104 interface on the Logic PCB. The state of the Digital Outputs is controlled by the Microprocessor PCB via the same interface.
Fig 9 – I/O PCB Block Diagram
3.4.3.1 TRAIN VOLTAGE DIGITAL INPUTS
A total of 6 isolated inputs are provided on the I/O PCB, each of which is capable of being operated by an incoming voltage level within the range 24 to 110VDC nominal (i.e. 16 – 140VDC).
These circuits provide an isolation voltage of ≥ 1.5kV AC.
These inputs are designed to withstand the voltage surges defined in RIA12 and EN50155 (with particular regard to Waveform A).
The state of these digital inputs is provided to the Microprocessor PCB via the Backplane and PC104 Interface circuitry on the Logic PCB.
To/From
Logic PCB
6 off Train Voltage Inputs
5 off Train Voltage
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3.4.3.2 DIGITAL OUTPUTS
All digital outputs have isolated changeover relay contacts, capable of switching the train voltage range defined above, with a continuous current rating of at least 500mA. These outputs are configured as normally open.
These circuits provide an isolation voltage of ≥ 1.5kV AC.
These outputs are designed to withstand the voltage surges defined in RIA12 and EN50155 (with particular regard to Waveform A).
The state of the digital outputs is controlled by the Microprocessor PCB, via the PC104 Interface circuitry on the Logic PCB.
3.4.3.3 TRANSIENT PROTECTION
Note that, for both digital inputs and outputs, the transient protection devices (VDRs) are fitted on the Connector PCB and not the I/O PCB.
3.4.4 Audio PCB This PCB provides the audio I/O to connect to the Driver’s Loudspeaker and Handset. This PCB provides the following functionality:
• DC bias for the handset microphone.
• Microphone pre-amplifier.
• Loudspeaker Class D Power Amp.
• Adjustable gain via software controlled digital potentiometers for signals to the loudspeaker and handset earpiece and from the handset microphone.
• Changeover circuit to allow selection/routing of audio signals to/from Cab 1 or 2, depending upon the state of the Driver’s key inputs to the Cab Radio.
Fig 10 – Audio PCB Block Diagram
From Logic PCB
Isolating Transformer
Power Amp
Isolating Transformer
Isolating Transformer
Loudspeaker
Earpiece
Mic
LS Out Cab 1
LS Out Cab 2
Ear Out Cab 1
Ear Out Cab 2
Mic In Cab 1
Mic In Cab 2
Pre Amp
DC Bias for Mic
Cab 1/ 2 Select
I2C Bus
Driver
Transient Protection
Transient Protection
Transient Protection
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3.4.4.1 LOUDSPEAKER VOLUME CONTROL SETTING
Three bands of volume level adjustment are required on the audio output to the driver’s Loudspeaker. Furthermore, when the Driver’s handset is removed from its cradle, a reduced audio level is provided from the loudspeaker.
Note: The required volume band is selected using the PMU according to the background noise level within the cab. The driver then has the capability to select individual volume levels within the selected band, using his Control Panel.
The Audio PCB provides a pre-amplifier for the loudspeaker power amplifier. The gain of this pre-amplifier is controlled by the microprocessor PCB. As the power amplifier (which is located on the Audio PCB) provides a fixed gain level, this pre-amplifier sets the input level to the power amplifier such that the required audio power levels at the driver’s loudspeaker can be obtained.
The following table gives the required volume levels from the driver’s loudspeaker:
Adjustment Bands
Quiet Cab
Normal Cab
Noisy Cab
Loudspeaker Power
1 1 0.25W 24.0dBm
2 0.335W 25.5dBm
3 Default 2 1 0.50W 27.0dBm
4 3 Default 2 1. 00W 30.0dBm
5 4 3 Default 2.00W 33.0dBm
5 4 3.00W 34.8dBm
5 4.00W 36.0dBm
Handset off hook 13 dBm below selected volume level
Table 1 - Volume control settings
3.4.4.2 EARPIECE VOLUME CONTROL SETTING
The Audio PCB allows adjustment of the handset earpiece volume to levels which correspond with the loudspeaker bands chosen.
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3.4.5 Power Supply (PSU) PCB The PSU PCB provides:
• A physical mounting for and electrical connections to the Switched Regulator.
• A bespoke power supply circuit converting 13VDC into 5VDC.
• A bespoke power supply circuit converting 13V(I) DC into 5V(I) DC.
• Two isolated digital inputs for use with the UPS. These are intended to allow the UPS to signal the Cab Radio that:
a) The Cab Radio is operating on battery backup (i.e. train supply failed).
b) The Battery Charge level is low.
• A circuit controlling operation of the two stirrer fans within the Cab Radio Assembly and, if present, the external cooling fan required to allow the Radio to operate at an ambient temperature of up to +70°C.
Fig 11 – PSU PCB Block Diagram
Switched Regulator
Train V (excluding 24VDC)
Train V (24VDC)
DC-DC Converter
(Not part of the PSU PCB - connects to the Backplane)
R adjust
Blocking Diode
13V-5V DC-DC Converter
13V 5V
13V-5V DC-DC Converter
5V(I) 13V(I)
Radio Transceiver
(connected to Backplane)
Fan Control
Temperature Sensor
Stirrer Fans
(on Backplane / Connector PCBs)
On/Off Control
External
Cooling Fans
From
Connector PCB
Isolated I/P
Isolated I/P
To
Logic PCB
Battery On
Battery Low
HP Charger Supply
666/HH/86219/000 Issue 1.0B Page 25
Cab Radio Detail Description
3.4.5.1 SWITCHED REGULATOR
The Switched Regulator is fed from an incoming train supply (via the connector between the PSU PCB and the Connector PCB) within the range 30 to 144 VDC. The output supply is then returned to the PSU PCB for subsequent routing to the DC-DC converter via the Backplane. This output voltage is set using a resistor, also fitted on the Power Supply PCB, to 34VDC.
Where the train supply voltage is 24VDC, this is routed directly to the DC-DC converter via the PSU PCB. A blocking diode is provided to prevent this supply feeding back into the switched regulator.
3.4.5.2 13 V TO 5V DC-DC CONVERTER PSU
The PSU provides a bespoke, high efficiency 13V to 5V power supply, based around a synchronous buck converter, which is used to provide power to circuits wholly within the Cab Radio assembly (e.g. the Microprocessor PCB). The output of this 5V PSU is 5V ± 5% @ ≥4 Amps. The 5V supply is distributed via the Backplane.
3.4.5.3 13V(I) TO 5V(I) DC-DC CONVERTER PSU
The PCB also contains a bespoke, high efficiency 13V to 5V PSU which is used to provide power to circuits connected outside the Cab Radio assembly (e.g. data transceivers). The output of this PSU is 5V ± 5% @ ≤ 1.0 Amp. The 5V(I) supply is distributed via the Connector PCB.
3.4.5.4 UPS 13V SUPPLY
A 13V(I) supply for a UPS is also provided. This is current limited to 15W by the UPS design.
This supply is also used, by the UPS, to provide the two inputs to the UK Cab Radio used to identify the source of power to the cab mobile.
3.4.5.5 FAN CONTROL CIRCUIT
This is provided to control the fans which are required to achieve the specified temperature range. These are enabled and disabled in accordance with the temperature warning output provided by the Radio Transceiver.
For 55°C operation, two stirrer fans are fitted within the Cab Radio. The internal stirrer fans themselves are not fitted to this PCB.
For 70°C operation, an additional fan is also required. This is located external to the Cab Radio enclosure, within the attached Plenum Chamber.
The circuit is enabled either from the digital output provided by the Kapsch radio, or from the analogue signal provided by the Sagem unit.
To prevent fan noise appearing on audio circuits within the Cab Radio, the circuit switches the isolated 13V(I) signal to operate the fans.
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3.4.5.6 UPS ISOLATED DIGITAL INPUTS
Two isolated digital inputs are provided for operation of the Cab Radio under battery backup (UPS) power.
These circuits provide an isolation voltage of ≥ 500V AC.
The inputs are used to allow the UPS to signal the Microprocessor PCB that:
a) The train power supply has failed, i.e. the Cab Radio is operating on UPS Battery power.
b) The UPS batteries are at low charge.
These inputs are provided with transient / ESD protection via transzorbs located on the Connector PCB.
The state of these digital inputs is provided to the Microprocessor PCB via the Backplane and PC104 Interface circuitry on the Logic PCB.
3.4.6 Backplane PCB This provides the required tracking and mating connectors for interconnection of the Logic, PA, Audio Control, PSU and I/O PCBs, the radio transceiver (which may be either a Kapsch or Sagem unit) and DC-DC converter.
Variation of connector size (number of ways), or offsetting of its position is normally used, to prevent mis-insertion of PCBs. Where this is not possible, these connections are provided with a coding comb (or similar).
With the exception of the Train Power Supply connection between the PSU PCB and DC-DC Converter, the Backplane only carries signals which are connected wholly within the Cab Radio assembly.
The backplane contains:
• Isolation transformers for audio signals to/from the GSM-R radio.
• Storage capacitors for the power supply to the GSM-R Radio Transceiver, on both the 13V and 5V rails.
• A set of transzorbs, which provide ESD protection for the PMU interface. These are directly connected to earth (chassis) via PCB mountings.
• A control circuit which allows transceiver software updates.
• A mounting for, and electrical connection to, one internal stirrer fan, located behind the PC104 stack.
• Three D type connectors providing a means of connecting an attached MMI to the Cab Radio (25 way), a connection for the PMU interface (9 way) and a connection for the external fan (9 way). The 9 way D types are of opposite gender.
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3.4.7 Connector PCB The Connector PCB is used to distribute signals which are either sourced from outside the Cab Radio assembly, or are intended to be supplied to equipment outside the Cab Radio assembly.
The PCB provides a physical mounting for the external 3 way ‘ARINC 404’ connector on the Cab Radio. The mounting arrangement comprises three pin grid arrays (PGAs) providing for:
• a 26 way insert (for train power and train voltage I/O connections).
• a 40 way insert (for MVB, low (13V) power feeds and PA/Intercom connections).
• a 67 way insert (for low voltage connections, such as audio, serial data and 13V I/O).
These PGAs accept the PC tails on the contacts within the ARINC connector.
The PCB also provides further connectors, all DIN 41612, which allow it to connect:
• Into the Logic PCB, for external serial interfaces and low voltage I/O.
• Into the Audio Control PCB for audio interfaces to the MMI(s).
• Into the I/O PCB, for train voltage I/O.
• Into the PA PCB for the or UK PA interface.
• Into the PSU PCB for the Train Power Supply input, UPS digital inputs and 13V(I) outputs.
A connector is fitted to allow direct connection of the MVB interface from the associated PC104 PCB, should this option be required.
The Connector PCB contains voltage dependent resistors (VDRs) for all train voltage digital I/O circuits together with transient protection devices (Transzorbs) all other external interfaces except transformer coupled audio interfaces. All these protection devices are directly connected to earth (chassis) via PCB mountings.
The Connector PCB also provides audio isolation/matching transformers for the audio outputs to the MMIs and external analogue radio.
In addition, the PCB provides:
• A connection to the Service Interface connector on the front of the Kapsch transceiver, comprising a 15 way density-and-a-half D connector, plus a control circuit enabled by the ‘Download Enable’ signal from the Logic PCB.
• A 9 way D connector, which provides an optional PMU interface.
• Electrical connection to one internal stirrer fan.
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3.4.8 PA PCB .
For the UK Cab Radio, this PCB provides a 40/5V UK PA interface.
The UK PA interface consists of a digital output (voltage free relay contact) and an audio signal output, as follows:
a) Radio PA Enable Output
This is a digital output relay contact, which is closed by the Cab Radio when a PA call is received by the Cab Radio, from the GSM-R ground system. The output contact switches a train supply DC voltage and is compliant with EN50155 and RIA 12.
b) PA Audio Output
Two audio outputs, one providing 40Vrms nominal and the other 5Vrms nominal, are provided using a transformer which meets the BR specification 1965. A relay contact switches the audio common from this transformer onto the line, so that no loading is presented to the line when the Radio PA is inactive. The audio amplifier circuit, which precedes the transformer, contain a digital potentiometer, which allows the actual audio level at the output to be varied, under software control.
Of these audio outputs, only one is used in a particular installation.
The electrical audio power interfaces are capable of delivering the following levels:
Audio Level from output (1) : 40 V rms @ 3.5 watts.
Output impedance at output (1) : 460Ω
Audio Level from output (2) : 5V rms @ 3.5 watts
Output impedance at output (2) : 50Ω
3.4.9 MVB Interface PCB (Optional)
The optional MVB interface PCB can be fitted to provide an MVB-compatible
interface from the GSM-R Cab Radio to Train control equipment on the train. It
is a COTS unit based on the PC104 standard and is a daughter board that is
fitted to the main processor board as part of a PC104 stack with a small ribbon
cable connected to a connector on the backplane.
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3.5 GLAND BOX
This houses the mating half of the ARINC connector on the Cab Radio and provides a set of EMC cable glands for termination and support of the train wiring to the Cab Radio. Each discrete interface is provided with an individual EMC gland (e.g. wiring to the PA system is routed via one gland, wiring to a driver’s handset via another, etc). The Gland Box provides for all possible interfaces to the Cab Radio. Unused interfaces have the gland positions fitted with blanking plugs.
The EMC glands allow direct bonding of the cable screens to earth, thus avoiding the use of lesser connection mechanisms, such as pig-tailing.
The Cab Radio is earthed via a 6mm stud on the Gland Box with the earth connection to the Cab Radio made via the earth terminal within the ARINC assembly.
The Gland Box is mounted on the Cab Radio via a number of threaded fixings.
A diagram of the Cab Radio with attached (Fully Populated) Gland Box is shown.
Fig 12 – Gland Box
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3.6 4 LINE DRIVERS CONTROL PANEL
3.6.1 Controller PCB
The Controller PCB provides the following functionality:
• An 80C51 compatible microcontroller.
• A power supply circuit, which converts the 13V feed from the Cab Radio into the supplies required by circuitry within the MMI.
• An RS422 transceiver providing a serial data path to the Cab Radio.
• Control of the backlights on the Keypad PCB.
• Scanning of the keys on the Keypad PCB.
• Communication with the MMI’s VFD.
• A Reset circuit, which provides the RESET signal used within the MMI.
Fig 13 - 4 Line Drivers Control Panel Block Diagram
Power Supply
13V From Cab Radio
5V
Microcontroller
Keypad (Keypad PCB)
Logic RESET
RESET
VFD Connector
Backlights (Generic)
Backlights (Emergency)
Backlights (Signaller)
Transient Protection
Transient Protection
TTL-RS422 Converter
Transient Protection
RS422 I/F (from Cab Radio)
RESET
Ambient Light
Detector
4s Delay Reset (to Cab Radio)
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Drawings
3.6.2 Power Supply This is a small PCB mounted, non-isolated switching DC-DC converter which provides the 5V supply required by the microcontroller and other MMI circuits. A diode is fitted at the power input from the Cab Radio, which provides reverse polarity protection.
The 13V supply from the Cab Radio is used to provide power to backlighting, via a reverse protection diode.
Transient protection is fitted close to the D connector, which provides ESD protection for the power supply input. As no earth connection is provided at the MMI, this is referenced to supply 0V.
3.6.3 Microcontroller This controls the various functions performed by the MMI and communicates with the Cab Radio, via a serial interface.
It uses an 80C51 compatible Microcontroller.
The Microcontroller contains the required Program (Flash) memory and RAM. No external memory ICs are provided on the Controller PCB.
3.6.4 RS422 Converter This translates between the balanced RS422 data provided by the Cab Radio and TTL levels, compatible with the serial interface on the microcontroller.
The converter is capable of data rates of up to 38400 bps.
Transient protection is fitted close to the D connector, which provides ESD protection for the RS422 interface. As no earth connection is provided at the MMI, this is referenced to supply 0V.
3.6.5 Backlighting Control This allows the intensity of the keypad backlighting to be varied, under the control of the microcontroller and application software.
In general, two levels of backlighting are provided for the keys. The automatic switchover point for these levels are set using an ambient light detector (e.g. phototransisitor) driving a comparator.
In addition to this, the Emergency and Urgent pushbuttons are also provided with a third, brighter, backlighting level used when a respective call is in progress. The Emergency and Urgent buttons can be flashed on and off.
3.6.6 Keypad Interface The Controller PCB configures the keypad into a row/column matrix, scanned under the control of the Microcontroller.
3.6.7 VFD Interface This allows the Microcontroller to display information on the VFD (Vacuum Flourescent Display). An 8 bit data bus is provided, together with handshaking lines required to monitor the status of the VFD.
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3.6.8 Keypad PCB The PCB provides the electrical connections for the keys, separating these into a row/column matrix compatible with the Controller PCB. The keys are actuated using Tactile Domes fitted to the Keypad PCB, which are operated by the keymat.
All keys are provided with backlighting, controlled by the Microcontroller on the Controller PCB. The ‘Emergency’ key is provided with Red backlights. All other keys are provided with Yellow backlights.
All keys are rated for better than 106 operations.
The Keypad PCB also provides a physical mounting for the ambient light detector, and connects this to the Controller PCB.
3.6.9 Display A 4 line Vacuum Fluorescent Display is used on the Drivers Control Panel. The characters are provided using a 5X7 dot matrix format. These characters are 5mm high.
The colour of the characters is modified by fitment of a blue anti-glare coloured filter in front of the VFD.
The display provides 4 levels of brightness, controllable using software via the interface on the Controller PCB.
3.7 HANDSET
The drivers handset connects to the rear of the cab radio. A single, voltage free, normally open pushbutton PTT switch is incorporated into the handset and a hookswitch is fitted into the cradle.
Fig 14 – Handset
3.8 LOUDSPEAKER
The loudspeaker is Integrated within the train cab, normally in the roof panel with
a suitable grille.
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3.9 UPS
The UPS Assembly comprises:
An enclosure containing the following:
• A control PCB.
• DC-DC Converter.
• A set of batteries.
Three variants of UPS are available which offer holdup times of 1, 2 and 4 hours respectively.
The UPS provides digital outputs to provide status information to the Cab Mobile including:
• Current Power Source – (Batteries or Vehicle supply).
• Batteries Low (10 minutes talk time left).
• UPS present.
The UPS design incorporates an “over ride” switch which allows a user to bypass the vehicle supply and power the cab mobile for 5 minutes if the Vehicle supply is missing and use of the radio is required. 5 Minutes provides long enough for the Cab Mobile to power up and initialise and for the user to enable the drivers control panel. Once the Drivers control panel is enabled (by pressing the Reg/dereg button for 2 seconds), the user can continue to use the radio after the 5 minute timer subject to an inactivity timer not expiring (set to 30 minutes). The inactivity timer is reset on each user action.
3.10 TRAIN MOUNTED ANTENNA
A roof-mounted Antenna is fitted. The GSM-R Antenna is a low-profile robust
assembly designed for fitting to vehicle roofs where a limited operating height is
available and conditions are harsh, such as high-speed trains.
Fig 15 - Antenna
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The radiating element is fixed to an aluminium base beneath a fibreglass radome,
making the overall assembly waterproof.
Alternative antennas are available to suit other particular constraints, (eg low
profile for some locos). Examples are shown below:
Fig 16 - Kathrein Antenna Type 741009
Fig 17 - Huber and Suhner - Sencity Antenna
Fig 18 - Sirtel Antenna type LP903
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Fig 19 - Sinclair Antenna- type ST421
3.11 RF CABLING
The antenna assembly is mounted onto the train roof via a ground plane and DC
grounded by direct connection between the Antenna base and the train roof. The
outer braid of the Antenna coaxial feeder cable is connected to the vehicle body at
both the Antenna and Radio assembly ends, as shown below.
ANTENNA
RADIO ENCLOSURE
Vehicle Body Earth
Vehicle Body Earth
Coaxial Cable
Fig 20 - Antenna Earthing Arrangements
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SOFTWARE ARCHITECTURE
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4 Software Architecture
4.1 GENERAL
This section introduces the architectural components of the GSM-R Cab Radio.
Each architectural component has been defined as a UML package, which is used to auto-generate the appropriate SDL Blocks and SDL Processes.
4.2 DESIGN RATIONALE
The Object Models, State Charts, Operations defined in the GSM-R Cab Radio SSFS were the driving influence on the breakdown of the GSM-R Cab Radio into its internal architecture.
Each of the SSFS Object Models and SSFS operations was used to define what Packages were required. Each of these Packages is automatically transformed into an SDL Block, by the Telelogic Tau tool.
This resulted in the following packages supporting particular SSFS Object Models:
Package Name State Diagram/Object Model/Operations supported
Location And Identity
Cab Radio Variants Model
Cab Radio Areas Model
Cab Radio Terminals Model
Cab Radio State Model
Cab Radio Functional Number Registration Status
Location and Identity SSFS Operations
Calls
Cab Radio Calls Object Model
One To One Voice Call State Chart
Group Call State Chart
Broadcast Call State Chart
Voice Call SSFS Operations
Configuration Management
Cab Radio Configuration Object Model
Configuration Management SSFS Operations
Text Messages
Cab Radio Text Message Object Model
Text Message SSFS Operations
Diagnostics
Diagnostics Object Model
Diagnostics State Chart
Diagnostics SSFS Operations
Logger
Logging operations of the Voice Call and Text Message Operation.
Emergency Call Confirmation Initiation.
Table 2 – Packages and SSFS Onject Models
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Each package consists of a number of processes. Each process is either an active process (i.e. a process which has a number of states) or a passive process, which does not have any related states.
There is at least one process within each block which is created at system start-up, and which controls the creation of any dynamic processes. The dynamically created processes have one of two purposes:
1. Managing the transition of a temporary object through its various states from instantiation to destruction (e.g. OneToOneVoiceCall)
2. Managing access to a particular type of data when that data exists (e.g. CRPreDefinedNumberDatabase).
Each package defines a number of Remote Procedures that enable other packages to invoke behaviour on or retrieve/modify information held by the package.
4.3 SOFTWARE SYSTEMS
The Cab Radio software consists of two software sub-systems:
• CabRadio.
• CabRadioAdmin.
The ‘CabRadio’ subsystem provides the cab radio functionality and consists of all packages, except ‘SoftwareAdministration’, and all interfaces, as detailed below.
The ‘CabRadioAdmin’ subsystem provides cab radio software administration, which includes software upgrades and version control. It consists of the following packages:
• SoftwareAdministration.
• PMUInterface.
• FileHandler.
• TCPInterface.
The CabRadioAdmin subsystem was conceived to allow the PMU to interrogate and have executive control of the Cab Radio software at all times, even if the cab radio software is a failed state.
4.4 CONTROL OF EXTERNAL INTERFACES
In addition to the SSFS functional areas the following additional UML packages have been defined to handle the interfaces to external entities:
• Human Machine Interface.
• Digital Interface.
• GSM-R Interface.
• PMU Interface.
• TBR Interface.
• TCP Interface.
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4.5 HUMAN MACHINE INTERFACE
The Human Machine Interface (HMI) is a bi-directional interface responsible for the communication between the GSM-R Cab Radio and the Cab Radio Control Panel.
The HMI also performs the audio indications to the operator via the Loudspeaker and Handset.
4.6 DIGITAL INTERFACE
The Digital Interface is a bi-directional interface which allows the detection of the following external events, by the monitoring of a number of memory mapped addresses. Each of the external interfaces identified can be monitored.
4.7 GSM-R INTERFACE
The GSM-R Interface is a bi-directional interface responsible for sending and receiving AT (ATtention) style Hayes commands to the GSM-R Radio MT. The AT commands supported by the GSM-R Radio MT are in accordance with GSM 07.07 and GSM 07.05.
4.8 PMU INTERFACE
The PMU interface is a bi-directional interface responsible for allowing GSM-R Cab Radio maintenance. The interface allows a PMU operator to perform diagnostics functions and also to re-configure various parameters and update databases on the GSM-R Cab Radio.
The Cab Mobile application can be downloaded into the radio using the PMU.
4.9 TCP INTERFACE
The TCP interface is a bi-directional interface that is responsible for the communication between the GSM-R Cab Radio and the PMU. It also allows communication between the GSM-R Cab Radio and any other future equipment that utilises the TCP/IP protocol stack.
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APPROVALS
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5 Approvals
5.1 ENVIRONEMENTAL PERFORMANCE
The Cab Radio equipment is designed such that it meets or exceeds the following Environmental performance requirements:
Test Description Test Specification Performance Requirements
Vibration Random EN 50155, Section 10.2.11
(Random vibration functional and
simulated long life tests)
Continuous Sine
EN 60068-2-6 Test Fc
Continuous Sine
EN 60068-2-6 Test Fc
Random Vibration Functional: -
As required by EN 61373 Section 9.1, body mounted, class B2.5m/s2 in all three planes. EUT functioning.
Simulated Long Life Random: -
As required by EN 61373 Section 9.1, body mounted, class B. EUT off during test.
5 – 10 Hz 7.5mm
10 – 200 Hz 1.5g
[Antenna: -
5 – 16 Hz 5mm
16 – 1000 Hz 2.5g]
Endurance by sweeping: 5hrs in all three planes.
Vibration response investigation followed by 30 mins.
endurance at critical frequencies.
Shock EN 50155, Section 10.2.11 In accordance with EN 61373.
Drop Test EN 60068-2-31 Test Ec Distance to test surface 0.5 metres
Drop (Free Fall ) EN 60068-2-32 Test Ed Free fall from 0.5 metre
High Temperature (operational)
BS EN 60068-2-2 Test BdEN50155, Section 10.2.4
+70°C (Note a version of the Cab Radio Assembly, with no external fan unit, will operate at maximum 55°C).
Low Temperature (operational)
BS EN 60068-2-1 Test AdEN50155, Section 10.2.3
-20°C
Max Temperature
Antenna Only (operational)
Designed to specification but not tested
+70°C
Low Temperature, Antenna Only (operational)
Designed to specification but not tested
-40°C
Change of Temperature (all equipment, operational)
EN60068-2-14 Test N 1°C/min., 2 cycles
Change of Temperature, Antennas (operational)
Designed to specification but not tested
3°C/sec.
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Storage Low Temperature (all equipment)
Designed to specification but not tested. EN50155, Section 10.2.14
-40°C
Storage High Temperature (all equipment)
As EN50155, Section 10.2.14 +85°C
Damp Heat EN 50155 Section 10.2.5
(EN 60068-2-30 Test Db)
As defined in EN 50155 95% RH
Ingress of Water & Dust Protection
EN 60529:19912 IP54 (Cab Radio, Control Panel and UPS).
Salt Mist Test EN50155 Section 10.2.10 Class ST2 (16 hours)
Pressure (Antennas)
No specification defined. Able to withstand: -
Pressure pulses of up to 6kPa (pk to pk) for up to 3 Sec. Pressure gradients of up to 100kPa/sec.
Altitude Low Air Pressure
EN 60068-2-13 Test M -100m to +1800m ref. sea level800mbar for 16 hours
Table 3 - Environmental standards
5.2 EMC
The UK Cab Radio Equipment is designed to comply with the requirements of the European Commission’s R&TTE Directive (1999/5/EC), and specific project requirements, by conformance to the following EMC performance requirements.
Test Description Test Specification
RF Emissions EN 50121-3-2:2000
Conducted Emissions EN 50121-3-2:2000
Transient Bursts EN 50121-3-2:2000
Voltage Transients and Surges*
PrEN 50121-3-255:2000
RIA 121999
RF Field Immunity EN 50121-3-2:2000
EN301 489-1
Electrostatic Discharge EN 50121-3-2:2000
Variations & interruptions of voltage supply*
EN 50121-3-2:2000
Table 4 - EMC performance
* The MMI does not need to comply with these tests, as it is powered from the Cab Radio, not from the Train power supply.
5.3 SAFETY TESTING
The UK Cab Radio Equipment is designed for compliance with the requirements of the European Commission’s Low Voltage Directive (73/23/EEC) and R&TTE Directive (1999/5/EC) via its compliance with all applicable requirements of EN60950.
Cab Radio Detail Description
666/HH/86219/000 Issue 1.0 Page 43
5.4 EIRENE APPROVAL
The UK Cab Radio is subject to the EIRENE approvals process and is to be certified
against Eirene FRS v6.0 and Eirene SRS v14.0.
5.5 BANNED/ TOXIC MATERIALS
The use of materials which could pose a health and safety risk, either under normal
or abnormal conditions, has been carefully controlled during the design of the UK
Cab Radio equipment.
The Cab Radio equipment does not contain any of the following materials:
• Asbestos.
• Mineral Wool.
• Ceramic Fibres.
• Lead Chromate (or compounds thereof).
• Zinc Chromate (or compounds thereof).
• Cadmium (or compounds thereof).
• Mercury (or compounds thereof).
• PCBs (Polychlorinated Biphenyls).
• CFCs (Chlorofluorocarbon).
• PAK (Polyester Alkyd).
• Halons (or Halogenated Hydrocarbons).