Liquid Level Switch liquiphant M FTL 51 C Level limit switch for all liquids, with high corrosion-resistant coating, suitable for use in hazardous areas Features and benefits • Large selection of corrosion-resistant materials for wetted parts coatings, ideally suited to the process • Welded, gas-tight bushing available, 2 nd line of defense even if sensor fails • Large selection of flanges for universal process adaptability • Compact fork, easy installation in tight areas • Wide variety of electronics, e.g. DPDT relay, 4 to 20 mA switch, PFM signal output, NAMUR and transistor • No calibration: quick, low-cost start-up • No mechanical moving parts: no maintenance, no wear, economical long operating life • Monitoring of fork damage: guaranteed operation Application The Liquiphant M is a level limit switch for use in all liquids • With temperatures between -40° and +300°F (-40° to +150°C) • Pressures up to 580 psi (40 bar) • Viscosity up to 10,000 cP • Density from 0.5 SGU The function is not affected by flow, turbulence, bubbles, foam, vibration, bulk solids content or buildup. The Liquiphant M is thus the ideal replacement for float switches, gap switches, capacitance and other technologies. Versatile Selection The coating of all sensor wetted parts (process connection, extension pipe and fork) is made of enamel or synthetic material to ensure compatibility in highly corresive liquids. The Liquiphant M includes versions for use in hazardous areas, including intrinsically safe and explosion-proof installations. Technical Information TI 347F/24/ae The Power of Know How Polyester housing Aluminum housing Dual compartment aluminum housing
Transcript
Liquid Level Switchliquiphant M FTL 51 C
Level limit switch for all liquids, with highcorrosion-resistant coating, suitable for usein hazardous areas
Features and benefits• Large selection of corrosion-resistant
materials for wetted parts coatings,ideally suited to the process
• Welded, gas-tight bushing available,2nd line of defense even if sensorfails
• Large selection of flanges foruniversal process adaptability
• Compact fork, easy installation intight areas
• Wide variety of electronics, e.g.DPDT relay, 4 to 20 mA switch, PFMsignal output, NAMUR and transistor
• No calibration: quick, low-coststart-up
• No mechanical moving parts: nomaintenance, no wear, economicallong operating life
• Monitoring of fork damage:guaranteed operation
ApplicationThe Liquiphant M is a level limit switch foruse in all liquids• With temperatures between -40° and
+300°F (-40° to +150°C)• Pressures up to 580 psi (40 bar)• Viscosity up to 10,000 cP• Density from 0.5 SGUThe function is not affected by flow,turbulence, bubbles, foam, vibration, bulksolids content or buildup. The LiquiphantM is thus the ideal replacement for floatswitches, gap switches, capacitance andother technologies.
Versatile SelectionThe coating of all sensor wetted parts(process connection, extension pipe andfork) is made of enamel or syntheticmaterial to ensure compatibility in highlycorresive liquids.
The Liquiphant M includes versions foruse in hazardous areas, includingintrinsically safe and explosion-proofinstallations.
TechnicalInformationTI 347F/24/ae
The Power of Know How
Polyester housing
Aluminum housing
Dual compartmentaluminum housing
FTL 51 C
Endress+Hauser
Function and system design
2
The Liquiphant M, a new generation of frequency shift tuning forks, brings greaterapplication flexibility and reliability to level switch users, especially in liquid applicationswhere highly corrosive chemicals are present. The Liquiphant M is not affected by gasbubbles, turbulence, foam, vibration, buildup, high viscosity, or bulk solids buildup.
The FTL 51C uses frequency shift technology for limit detection. The forks vibrate attheir resonant frequency. This frequency changes when covered or uncovered by theliquid material, which activates a limit switch. The frequency shift of the fork is moni-tored, an alarm state is indicated if there is fork corrosion or damage. Loss of powerand piezo drive failure is also alarmed.
Maximum or minimum level detection in tanks, vessels or piping containing all types ofhot or cold liquids, also in explosion hazardous areas. The Liquiphant M can bemounted at any orientation. In applications where room allows, the unit can beextended into the vessel (up to 115”) with an extension tube. The FTL 51 C is avail-able with coatings for wetted parts and is mainly applied in applications with corrosivefluids.
Function
Application
System A complete system consists of an electronic insert, housing, process connector andsensor.
Level SensorLiquiphant C FTL 51with electronic insertsFEL 55, FEL 56, FEL 57, FEL 58for connection to a separateswitching unit or isolating amplifier
Level Limit Switch OutputLiquiphant C FTL 51with electronic insertsFEL 51, FEL 52, FEL 54
IS
…
…
FTL 51C
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Modular design Depending on the application, the Liquiphant M is available in various electronic andmechanical versions to fulfill industrial applications
Construction FTL 51 C extended unit with extension pipe (from 6” to 115”)
Level (limit value), liquids
Specified by mounting point and length of sensor with extension pipe, maximum 115”with plastic coating; maximum length 48” with enamel coating
Switch selectable on the electronic insert, > 0.5 SGU or > 0.7 SGU
1” to 3” ANSI flanges, Class 150 or 300
Wetted parts, 316 L SS (process side of flange / extension tube / fork): plastic coatedin ECTFE or PFA (Edlon [blue], RubyRed [red], or conductive PFA [black]), orAlloy C 4 for enamel coated.Temperature spacer and pressure-tight bushing, 316 L SS
Measured variable
Measuring (detection) range
Product density
Process connections
Materials
Housings Polyester housing, PBT-FR with PBT-FR cover or PA 12 transparent cover, EPDMcover seal.Aluminum housings, epoxy coated, EPDM cover seal.Steel housing, 316L SS, silicone cover seal.Cable entries, 316L SS.
FEL 51: Two-wire AC connecitonFEL 52: Three-wire DC connection, PNPFEL 54: Universal power (AC/DC) DPDT relayFEL 55: Output 8 / 16 mA for separate switching unitFEL 56: Output 0.6 to 1.0 / 2.1 to 2.8 mA for remote
switching unit (NAMUR)FEL 58: Output 2.1 to 3.5 / 0.6 to 1.0 mA for remote
switching unit (NAMUR)FEL 57: Output 50 / 150 Hz, PFM, for remote switching
unit (Nivotester)
E7 Aluminum housingwith separate connectioncompartment (also forhazardous areas)
FTL 51 C
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Electronic insert function
Electronic inserts for level limitswitches
• FEL 51: two-wire AC version, switch the load directly into the power supply circuitvia the thyristor
• FEL 52: three-wire DC version, switch the load via the transistor (PNP) andseparate connection (preferably used with PLC controller)
• FEL 54: universal AC / DC version with DPDT relay, switch the loads via two dry(potential-free) relay contacts
• FEL 55: two-wire loop-powered for separate switching unit for connecting to aPLC, signal transmission 16 / 8 mA (high to low current) along two-wire cabling
• FEL 56: two-wire for separate switching unit, signal transmission 0.6 to 1.0 / 2.1 to2.8 mA (low to high current) to EN 50227 (NAMUR) along two-wire cabling
• FEL 58: two-wire for separate switching unit, signal transmission 2.1 to 3.5 / 0.6 to1.0 mA (high to low current) to EN 50227 (NAMUR) along two-wire cabling.Checking of connecting cable and other devices by pressing a push button on theelectronic insert.
• FEL 57: two-wire for separate switching unit, PFM signal transmission, currentpulses superimposed on the power supply along the two-wire cabling. Testingat the switching unit without changing levels.
FEL 51, 52: Between sensor and power supplyFEL 54: Between sensor, power supply and loadFEL 55, 56, 57, and 58: Refer to remote switching unit connected
Electronic insert wiring terminals, maximum 14 AWG (2.5 mm2), stranded in cablesleeve according to DIN 46228.Ground connection in housing, maximum 14 AWG (2.5 mm2)External housing ground for plant grounding system, maximum 11 AWG (4 mm2)
Electronic inserts for level sensors
Galvanic isolation
Connecting cables
Electronic insert operation and setup
FEL 51, 52, 54 and 55: 2 switches for fail-safe mode and density change, green LEDto indicate power on, red LED to indicate switching status (flashes when sensor isdamaged by corrosion or when the electronics are defective)FEL 56: 2 switches for fail-safe mode and density change, green LED flashes toindicate power on, red LED indicates switching status (flashes when sensor is dam-aged by corrosion or when the electronics are defective)FEL 57: 2 switches for density change and cyclical checking, green LED indicatespower is on, yellow LED indicates forks are covered (flashes when sensor is damagedby corrosion or when the electronics are defective)FEL 58: 2 switches for fail-safe mode and density change, green LED flashes rapidlyto indicate power on, flashes slowly on damage by corrosion on sensor or when theelectronics are defective, yellow LED indicates relay status. Test push button breakssensor circuit (refer to page 9).
Display and operation elements
Min
Max1
2
>0.7
>0.5
FEL51
Connectingterminals
LEDsSwitches
1 2
L1 N V19 to 253V AC50/60Hz
I max : 350mA
FTL 51C
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Failsafe mode
Dependent on electronic insert specified, refer to pages 6 thru 10
Switch status for minimum / maximum residual current safety on electronic insert (withFEL 57 connected to remote switching unit FTL 325 P only).Maximum fail-safe: the output switches to the power failure mode when fork is covered(for use with overspill protection, etc.)Minimum fail-safe: the output switches to the power failure mode when fork is uncov-ered (for use with dry pump protection, etc.)
Approximately 0.5 seconds when forks are covered, approximately 1.0 seconds whenforks are uncovered
When switching power on, the output assumes the alarm signal mode. After amaximum 2 seconds, it assumes the correct switch status (exception, FEL 57).
Output
Output signal
Response time
Power up response
Accuracy
Ambient temperature, 73°F (23°C)Product temperature 73°F (23°C).Product density, 1 SGU (water)Viscosity, 1cPPressure, 0 psigSensor mounted vertically from top anddensity selector switch > 0.7 SGU.
Specified by mounting position, ± 0.04” maximum (1 mm)
0.004” (0.1 mm)
ECTFE, PFA: approximately 0.08” (2 mm)Enamel coated: approximately 0.098” (2.5 mm)
ECTFE, PFA: maximum +0.06” to -0.07” (-40° to +248°/302°F); maximum +1.4 mmto -2.8 mm (-40° to +120°/150°C)Enamel: maximum +0.024” to -0.059” (-40° to +302°F); maximum +0.6 mmto -1.5 mm (-40° to +150°C)
Maximum 0.19” to -0.14” (4.8 to -3.5 mm) at 0.5 SGU to 1.5 SGU
ECTFE, PFA: maximum 0” to -0.079” (0 to 580 psi); 0 to -2.0 mm (0 to 40 bar)Enamel: maximum 0” to -0.04” (0 to 362 psi); 0 to -1.0 mm (0 to 25 bar)
Reference conditions
Measured error
Repeatability
Hysteresis
Effects of product temperature
Effects of density
Effects of pressure
0.51"(13 mm)
Switchpoint forreference conditions
FTL 51 C
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Wiring and output function
FEL 51 two-wire AC NOTE: FEL 51 unit must be connected inseries with a load.• Input power, 19 to 253 VAC, current
consumption, 3.8 mA.• The minimum voltage drop across the
load at the electronic insert is 19V. *
* The terminal voltage at the electronic insert must notbe below 19 V. Note the voltage drop across theelectronic insert in the conducting state (max. 19 V),the residual current in the blocked state (max. 3.8 mA)and, when using low voltages, the voltage dropacross the load.
• When a relay cannot de-energize witha residual current below 3.8 mA, aresistor should be connected inparallel to the relay.
• Signal on alarm, < 3.8 mA on powerfailure or damaged sensor.
• Diagnostic warning, the red LEDflashes when sensor is damaged bycorrosion, or when self-diagnosticsdetect electronics are defective.
• Connectable load: load is switcheddirectly into the power supply circuitvia thyristor.Transient current (40 ms), maximum1.5 mA, maximum 375 VA at 253 VACor maximum 36 VA at 24 VAC (notshort-circuit protected).Continuous maximum 89 VA at253 VAC, maximum 8.4 VA at 24 V.Minimum 2.5 VA at 253 V (10 mA).Minimum 0.5 VA at 24 V (20 mA).
= lit= unlit
IL = Load current (open)< 3.8 mA = Residual current (blocked)
The load can be an indicator light or remote relay. When switch is in the “OFF” state, atrickle current flows (up to 3.8 mA), not enough to light an indicator or actuate a relay.When the switch is in the “ON” state, current flow increases to a level that can activatea remote relay or light a filament bulb.
Max.
Min.
1 2
1 2
1 2
1 2
IL
IL
< 3.8 mA
< 3.8 mA
Fail-safemode
Level Output signal LEDsgreen red
L1
Externalload
Maximum 253 VAC50/60 Hz
1
N N GND
2
1ASlowblow
min.19 V
FEL 51
Housing
ElectronicInsert
Replacement module PN: 5002304
FTL 51C
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FEL 52 three-wire DC NOTE: FEL 52 is preferably used withprogrammable logic controllers (PLC)• Input power, 10 to 55 VDC. Maximum
ripple 1.7 V, 0 to 400 Hz. Maximumcurrent consumption, 15 mA;maximum power consumption, 0.83W.Reverse polarity protected.
• Positive signal at the switching outputof the electronics (PNP).
• Signal on alarm, < 100µA on powerfailure or damaged sensor.
• Diagnostic warning, the red LEDflashes when sensor is damaged bycorrosion or when self-diagnosticsdetect electronics are defective.
• Connectable load: load is switchedvia transistor and separate PNPconnection.Transient (1 second) maximum 1 A,maximum 55 VDC (overload andshort-circuit protected).Continuous maximum 350 mA,maximum 0.5 µF at 55 V, 1 µF at 24 V.Residual voltage < 3V with closedtransistor; residual voltage < 100 µAwith open transmitter.
= lit= unlit
IL = Load current (closed)
< 100 µA = residual current
FEL 54 universal AC / DC power withDPDT relay
Note the differences in input voltages forVAC and VDC.• Input power, 19 to 253 VAC or 19 to
55 VDC. Max. power consumption,1.3 W, reverse polarity protected.
• Both relays switch simultaneously.• Signal on alarm on power failure or
damaged sensor, relays de-energize.• Diagnostic warning, the red LED
flashes when sensor is damaged bycorrosion, or when self-diagnosticsdetect defective electronics.
• Connectable load: load is switchedvia DPDT relay contactsI ~ max. 6 A, U ~ max. 253 VP ~ max. 1500 VA, P.F. (cos ϕ) = 0.1P ~ max. 750 VA, P.F. (cos ϕ) = 0.7I - max. 6A to 30V, I - max. 0.2A to 125V
NOTE: When connecting a low-voltagecircuit with reliable isolation according toDIN/VDE 0160, the following applies: Totalof voltages of relay output and powersupply, maximum 300 V.
= lit= unlit
When connecting an instrument with high inductance,provide a spark arrester to protect the relay contacts.A fine-wire fuse (depending on load connected)protects the relays from short-circuiting.
= relay energized
= relay de-energized
L+
10 to 55 VDC
1
L–
2 3(+)
Load,e.g.RelayPLC
Housing
ElectronicInsert
–
0.5ASlowblow
FEL 52
Max.
Fail-safemode
Level Output signal LEDsgreen red
Min.
L+ +1 3
L+ +1 3
1 3
1 3
IL
IL
< 100 µA
< 100 µA
L1L+
NO NOC C
19 to 253 VAC, 50/60 Hz19 to 55 VDC
1 4 73 6
NL–
NC NC
2 5 8
0.5Aslowblow
FEL 54
GND
Housing
ElectronicInsert
Max.
Min.
3 54
3 54
6 87
6 87
3 54
3 54
6 87
6 87
Fail-safemode
Level Output signal LEDsgreen red
Replacement module PN: 5002305
Replacement module PN: 5002306
FTL 51 C
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FEL 55 two-wire for remoteswitching unit
For connecting to programmable logiccontrollers (PLC). Output signal jumpsfrom high to low current when limitreached (H-L edge).• Input power, 11 to 36 VDC.• Signal on alarm, < 3.6 mA on power
failure or damaged sensor.• Diagnostic warning, the red LED
flashes when sensor is damaged bycorrosion or when self-diagnosticsdetect electronics are defective.
• Connectable load:
U - 11V16.8 mA
Load R =
U = 11 to 36 VDC
= lit= unlit
~ 16 mA = 16 mA ± 5%~ 8 mA = 8 mA ± 6%
FEL 56 two-wire for remoteswitching unit
For connecting to isolating amplifiersaccording to NAMUR (EN 50227), e.g.FTL 325 N or FTL 375 N fromEndress+Hauser.Output signal jumps from low to highcurrent when limit reached (L-H edge).When connecting to a multiplexer, adjustclock time to 2 seconds minimum.• Input power, Isolating Amplifier• Signal on alarm, > 2.1 mA on power
failure or damaged sensor.• Diagnostic warning, the red LED
flashes when sensor is damaged bycorrosion, or when self-diagnosticsdetect electronics are defective.
• Connectable load: refer to technicaldata of isolating amplifier connectionaccording to EN 50227 (NAMUR).
= unlit
= lit
= flashes
–11 to 36 VDCe.g. PLC
1
+
2
FEL 55
E X
E XI
Housing
I.S.
ElectronicInsert
Hazardous area
Safe area
Max.
Min.
+2 1
+2 1
+2 1
+2 1
~16 mA
~8 mA
~8 mA
~16 mA
Fail-safemode
Level Output signal LEDsgreen red
Max.
Min.
+2 1
+2 1
+2 1
+2 1
2.1 to2.8 mA
2.1 to2.8 mA
0.6 to1.0 mA
0.6 to1.0 mA
Fail-safemode
Level Output signal LEDsgreen red
Replacement module PN: 5002307
Replacement module PN: 5002308
–Isolating amplifier
to EN 50227(NAMUR)
1
+
Safe area
I.S.
Hazardous area
2
FEL 56
EX
EX
I
ElectronicInsert
Housing
Nivotester (1-channel)FTL 325 Nor 375 N
Nivotester (3-channel)FTL 325 Nor 375 N
7
7
33 3734 388
8
Sensor 1 Sensor 2 Sensor 3
FTL 51C
Endress+Hauser 9
FEL 58 two-wire for remoteswitching unit with test push button
For connecting to isolating amplifiersaccording to NAMUR (EN 50227), e.g.FTL 325 N or FTL 375 N fromEndress+Hauser.Output signal jumps from high to lowcurrent when limit reached (H-L edge).The FEL 58 includes a test push buttonon the electronic insert. Pressing thebutton breaks the connection to theisolating amplifier.
NOTE: The test function can be used forhazardous locations as long as there isno explosive atmosphere near theelectronics housing.
When connecting to a multiplexer, adjustclock time to 2 seconds minimum.• Input power, Isolating Amplifier• Signal on alarm, < 1.0 mA on power
failure or damaged sensor.• Diagnostic warning, the yellow LED
flashes when sensor is damaged bycorrosion, or when self-diagnosticsdetect electronics are defective.
• Connectable load: refer to technicaldata of isolating amplifier connectionaccording to EN 50227 (NAMUR).
• Connectable to isolating amplifierswhich have special safety circuits(I > 3.0 mA).
= unlit
= lit
= flashes
Max.
Min.
+2 1
+2 1
+2 1
+2 1
2.1 to3.5 mA
2.1 to3.5 mA
0.6 to1.0 mA
0.6 to1.0 mA
Fail-safemode
Level Output signal LEDsgreen yellow
Min
Max1
2
>0.7
>0.5
FEL58
Connectingterminals LEDs Switches
Push buttonto test
1 2
EN 502268.2 VDC NAMUR
- +T
Replacement module PN: 5006454
–
1
+
2
FEL 58
EX
EXI
Housing
Hazardous area
Safe area
Isolating amplifierto EN 50227 (NAMUR)
I.S.
ElectronicInsert
Nivotester (1-channel)FTL 325 Nor 375 N
Sensor 1 Sensor 2 Sensor 3
Nivotester (3-channel)FTL 325 Nor 375 N
7
7
33 3734 388
8
FTL 51 C
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FEL 57 two-wire for separateswitching unit
For connecting to switching unitsNivotester FTL 325 P, FTL 375 P, FTL 370and FTL 372 (also with cyclical checking)from Endress+Hauser.• Input power provided by switching unit.• Output signal, PFM (Pulse Frequency
Modulation) jumps from high to lowfrequency when sensor covered.
• Switching between Min. / Max. fail-safe is set in Nivotester.
• Signal on alarm, 0 Hz on power failureor damaged sensor.
• Diagnostic warning, the yellow LEDflashes when sensor is damaged bycorrosion, or when self-diagnosticsdetect electronics are defective.
• Connectable load: relay contactsprovided in Nivotester unit, refer toappropriate technical data of unitselected.
Additional function, Cyclical Checking.After interruption of the power supply, aclock is activated which checks thesensor and electronics without anychange in level. Approved for overspillprotection (according to WHG, Germany).
This check is activated and monitored bythe external switching unit.
= lit= unlit
NOTE: Please note the switching response and function of the unit when installed, especiallywhen replacing a Liquiphant with an EL 17 Z or FEL 37 electronic insert with a Liquiphant M/Swith the FEL 57 electronic insert.
Fail-safe modeset atswitching unit
Max.
Max.
Max.
Max.
Min.
Min.
Min.
Min.
Settingat FEL 57
STD
EXT
STD
EXT
STD
EXT
STD
EXT
Fork
free
free
covered
covered
free
free
covered
covered
Switching status of relay in switching uniton = energized off = de-energized
Test start End of test start(power off) (power on)> 3 s
on
on
off
off
off
off
on
on
off
off
off
off
~ 3 s on
~ 3 s on
~ 3 s on
~ 3 s on
~ 5 s off
~ 5 s off
off
off
~ 5 s off
~ 7 s off
~ 5 s off
~ 5 s off
~ 2 s on
~ 2 s on
~ 3 s on
on
~ 35 s on ~ 3 s off
~ 2 s off
~ 35 s off
off
~ 30 s on
on
on
on
* De-energized on power supply failure
off
*
*
*
*
150 Hz
50 Hz
Fail-safemode
Level Output signal(PFM)
LEDsgreen yellow
Replacement module PN: 5002309
–
1
+
2
FEL 57
EX
EX
PFM50 /150 Hz
Safe area
Hazardous area
ElectronicInsert
Housing
I.S.
Nivotester (1-channel)FTL 325 Por 375 P
Sensor 1 Sensor 2 Sensor 3
Nivotester (3-channel)FTL 325 Por 375 P
7
7
33 3734 388
8
FTL 51C
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Operating conditions (installation)
Mounting, switchpoint location Switchpoints on the sensor depend on the mounting position, with reference to water(density 1 SGU at 73°F, 0 psi). Because the Liquiphant sensor requires no calibration,the switchpoint is determined by the position of the tuning fork.
NOTE: The switchpoints of the Liquiphant M are at different positions compared to theprevious compact Liquiphant II (FTL 360, FTL 365, FDL 30 and FDL 35).
= Switchpoint
Mounting, high viscosity liquids Examples of mounting with regard to the viscosity of the liquid are shown below. Theoptimum mounting position, even with high viscosity liquids is vertical, from the vesseltop, or horizontal (flush mounted from the side).
NOTE: Horizontal mounting, position the forks so that the narrow edge of the tines arevertical. This ensures that the liquid can run off easily.
Top mounted(vertical)
Side mounted flush(horizontal)
Mounting, low viscosity fluids Mounting positions for low viscosity liquids (up to 2000 cP) are shown below. The FTL51 C is nozzle mounted as shown.
Min. 2"(DN 50)
∅ Min. 1-1/2"(DN 40)
∅
Min. 1"(25)
0.51"(13)
0.16"(4)
Top mounted
Top mounted
Bottom mounted
Bottom mounted
Plastic coated
Enamel coated
Side mounted
Side mounted
0.16"(4)
0.16"(4)0.31"
(8)
0.51"(13)
FTL 51 C
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Mounting, pipe installation The FTL 51 C can be mounted into pipe lines 2” and larger.
NOTE: Ensure narrow edge of forks is parallel with the pipe walls to avoid blockage ofthe flowing material.
To maintain optimum performance, the liquid should have velocities up to 16 ft/s(5 m/s) with a viscosity of 1 cP and a density of 1 SGU.
Mounting, extension tubes When mounting an extended version ofthe FTL 51 C in fluids which may applyhigh lateral forces, the extension pipeshould be supported (such as an internalextension support pipe). Ensure theinternal support does not hinder theoperation of the forks.
Ensure there is adequate space betweenoutside walls or ceilings and the vesselmounting point if ordering theFTL 51 C with extension tube. Extensiontubes up to 20” (500 mm) can bemounted at any orientation. Extensiontubes over 20” and up to 115” must bemounted vertically.
Mounting, vessel wall build-up When there is build-up on the vessel wall, mount the FTL 51C with sufficient distancebetween the wall and fork assembly.
**
Top mounted(vertical)
* Ensure there is sufficient distance between expected build-up on the wall and fork assembly.
Side mounted, fork inside tank(horizontal)
FTL 51C
Endress+Hauser 13
Operating conditions (environment)
Ambient conditions Permissible ambient temperature T1 at the housing is dependent on the producttemperature T2 inside the vessel.
Ambient temperature range -60° to +160°F (-50° to +70°C)
-60° to +180°F (-50° to +80°C)
Climatic protection to IEC 68, Part 2-38, Figure 2a
To IEC 68, Part 2-6 (10 to 55 Hz, 0.15 mm, 100 cycles)
Interference immunity, EN 61326-1 (industrial use), EN 50082-2 (1995)Interference emission to EN 61326-1, EN 50081-1
Polyester and aluminum housings, NEMA 4XAluminum housing (hazardous version), NEMA 4X and NEMA 6P (3 ft water for24 hours)
Storage temperature range
Climatic class
Vibration resistance
Electromagnetic compatibility
Degree of protection
Operating conditions (process)
PFA, enamel coatings: -40° to +300°F (-40° to +150°C)ECTFE coating: -40° to +250°F (-40° to +120°C)
Maximum 250°F/s (120°C/s)
ECTFE, PFA: -14 to +580 psi (-1 to +40 bar); Enamel: -14 to +360 psi (-1 to +25 bar)over the entire temperature range. For exceptions, see process connections (nominalpressure for flanges)
Burst pressure of diaphragm, 2900 psi (200 bar)
Maximum 290 psi/s (20 bar/s)
Liquid
Minimum 0.5 SGU
Maximum 10,000 cP
Maximum 0.2” (5 mm diameter)
Medium temperature range
Thermal shock
Medium pressure
Limiting medium pressure range
Medium state
Density
Viscosity
Bulk solids content
Pressure shock
160°F
T1T1
120°F
140°F
32°F–40°F
–40°F
Extended temperature range for instruments with temperature spaceror pressure-tight bushing.
32°F 120°F
*
*
212°F
EC
TF
E
PFA
Ena
mel
250°F
300°F T2
T2
194°F
FTL 51 C
Endress+Hauser14
Mechanical construction
Dimensions Housing and sensor FTL 51 C
ø3.35"(85)
ø3.00"(76)
3.00"(76)
4.65"(118)
4.65"(118) 1.14"
(29)0.98"(25)
With ECTFE,PFA coating
With enamelcoating
5.31"(135)
0.81"(20.6)
2.52"(64)
Max.5.51"(140)
Max. ø0.96"(24.8)
E4 Polyester housing
E6 SS housing
E5 Aluminum housing
E7 Separate compartmentAluminum housing
ø3.15"(80)
2.56"(65)
2.36"(60)
6.81"(173)
4.65"(118)
4.65"(118)
0.26"(6.5)
0.26"(6.5)
max. 2.56"(65)
max. 7.48"(190)
max. 3.82"(97)
FTL 51C
Endress+Hauser 15
Temperture spacer / pressure tightfeed through
Temperature spacerTemperature spacer provides sealedinsulation of the vessel and normalambient temperatures for the housing byextending the electronics (5.5”) from themounting flange.
Pressure tight feed throughSecond line of defense protects theelectronics housing from vessel pres-sures up to 580 psi (40 bar) should thesensor become damaged. The feedthrough also provides sealed insulation ofthe vessel and normal ambient tempera-tures for the electronics housing.
Vesselinsulation
Temperaturespacer, 5.51"(140 mm)
Process connection ANSI B 16.5 raised face flanges from1-1/2” to 3” in Class 150 or Class 300 areavailable for the FTL 51 C. DIN and JISflanges are also available, please consultfactory. Pressure ratings of flangesshould be followed except as notedbelow.
ECTFE coated: maximum 580 psi at240°F (40 bar at 120°C)PFA coated: maximum 580 psi at300°F (40 bar at 150°C)Enamel: maximum 360 psi at 300°F(25 bar at 150°C)
Extended length “L” for FTL 51 CExtended lengths are available, andspecified in 1” increments. Maximumlenght for horizontal mounting is 20” (500mm).
4.53"(115)
L
L = 6" to 115" (148 to 3000 mm)for plastic coated sensor
L = 6" to 48" (148 to 1200 mm)for enamel coated sensor
FTL 51 C
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Certificates and approvals
By attaching the CE Mark, Endress+Hauser confirms that the instrument fulfills all therequirements of the relevant EC directives.
Based on the various certificates, permissible combinations of coatings, housings andelectronic inserts are listed below.Abbreviations: Polyester = PBT, stainless steel = SS, aluminum = Alu.,Aluminum housing with separate connection compartment = Alu/sep.
Coating: ECTFE, PFA, enamelApprovals Housing Electronic insertNon-hazardous areas PBT, SS, Alu, Alu/sep FEL 51, 52, 54
FEL 55, 56, 57, 58FM NI Cl. I, Div. 2, Grps. A-D SS, Alu, Alu/sep with FEL 51, 52, 54
NPT conduit entry FEL 55, 56, 57, 58PBT with NPT conduit FEL 51, 52entry FEL 55, 56, 57, 58
CSA, General Purpose SS, Alu, Alu/sep with NPT FEL 51, 52, 54conduit entry FEL 55, 56, 57, 58PBT with NPT conduit FEL 51, 52entry FEL 55, 56, 57, 58
Coating: Enamel or PFA (conductive)Approvals Housing Electronic insertFM IS CI. I, II, III; Div. 1, Grps. A-G PBT, SS, Alu, Alu/sep
with NPT conduit entry FEL 55, 56, 57, 58FM XP CI. I, II, III; Div. 1, Grps. A-G Alu with NPT conduit FEL 51, 52, 54
entry FEL 55, 56, 57, 58CSA IS CI. I, II, III; Div. 1, Grps. A-G PBT, SS, Alu, Alu/sep
with NPT conduit entry FEL 55, 56, 57, 58CSA XP CI. I, II, III; Div. 1, Grps. A-G Alu with NPT conduit FEL 51, 52, 54
entry FEL 55, 56, 57, 58
NOTE: Polyester housing electrical connection in piping: do not screw cable entriesfirmly to the piping. Use flexible connections (e.g. armored cable). If the piping is usedfor grounding, ensure there is a continuous electrical connection.NOTE: Other approvals are available, such as ATEX, etc. Please consult factory forinformation.
CE Mark
Hazardous area approvals
FTL 51C
Endress+Hauser 17
Ordering information
Liquiphant M, FTL 51 CFTL 51 C - 1.7 lb (0.8 kg)1 Certificate, application
A Without any special certificateP FM IS, CL I, II, III; Div. 1; Grps. A-GQ FM approved, XP, CL I, II, III; Div. 1, Grp. B-G (Aluminum housing E7)
Groups A-G if E5 housing selection is usedR FM NI, CL I; Div. 2; Grps. A-DS CSA IS, CL I, II, III; Div. 1; Grps. A-GT CSA XP, CL I, II, III; Div. 1; Grps. A-GU CSA general purpose, NI
2 Process connection / material / coating Additional WeightA8K 1” ANSI flange, Class 150, RF / 316L SS / ECTFE 2.2 lb (1.0 kg)ACK 1-1/2” ANSI flange, Class 150, RF / 316L SS / ECTFE 3.3 lb (1.5 kg)AEK 2” ANSI flange, Class 150, RF / 316L SS / ECTFE 5.3 lb (2.4 kg)AFK 2” ANSI flange, Class 300, RF / 316L SS / ECTFE 7.0 lb (3.2 kg)ALK 3” ANSI flange, Class 150, RF / 316L SS / ECTFE 10.8 lb (4.9 kg)A8L 1” ANSI flange, Class 150, RF / 316L SS / PFA (Edlon™) 2.2 lb (1.0 kg)ACL 1-1/2” ANSI flange, Class 150, RF / 316L SS / PFA (Edlon™) 3.3 lb (1.5 kg)AEL 2” ANSI flange, Class 150, RF / 316L SS / PFA (Edlon™) 5.3 lb (2.4 kg)AFL 2” ANSI flange, Class 300, RF / 316L SS / PFA (Edlon™) 7.0 lb (3.2 kg)ALL 3” ANSI flange, Class 150, RF / 316L SS / PFA (Edlon™) 10.8 lb (4.9 kg)A8M 1” ANSI flange, Class 150, RF / 316L SS PFA (RubyRed) 2.2 lb (1.0- kg)ACM 1-1/2” ANSI flange, Class 150, RF / 316L SS / PFA (RubyRed) 3.3 lb (1.5 kg)AEM 2” ANSI flange, Class 150, RF / 316L SS / PFA (RubyRed) 5.3 lb (2.4 kg)AFM 2” ANSI flange, Class 300, RF / 316L SS / PFA (RubyRed) 7.0 lb (3.2 kg)ALM 3” ANSI flange, Class 150, RF / 316L SS / PFA (RubyRed) 10.8 lb (4.9 kg)A8N 1” ANSI flange, Class 150, RF / 316L SS / PFA (conductive) 2.2 lb (1.0 kg)ACN 1-1/2” ANSI flange, Class 150, RF / 316L SS / PFA (conductive) 3.3 lb (1.5 kg)AEN 2” ANSI flange, Class 150, RF / 316L SS / PFA (conductive) 5.3 lb (2.4 kg)AFN 2” ANSI flange, Class 300, RF / 316L SS / PFA (conductive) 7.0 lb (3.2 kg)ALN 3” ANSI flange, Class 150, RF / 316L SS / PFA (conductive) 10.8 lb (4.9 kg)AES 2” ANSI flange, Class 150, RF / Alloy C4 / Enamel 5.3 lb (2.4 kg)AFS 2” ANSI flange, Class 300, RF / Alloy C 4 / Enamel 7.0 lb (3.2 kg)
3 Length L, MaterialCK Length in inches _________, (6” to 115”), ECTFE 5 lb/100” (2.3 kg/100in)CL Length in inches _________, (6” to 115”), PFA (Edlon™) 5 lb/100” (2.3 kg/100in)CM Length in inches _________, (6” to 115”). PFA (RubyRed) 5 lb/100” (2.3 kg/100in)CN Length in inches _________, (6” to 115”), PFA (conductive) 5 lb/100” (2.3 kg/100in)CS Length in inches _________, (6” to 48”), Enamel 5 lb/100” (2.3 kg/100in)Length type II, for replacing Liquiphant II (FTL 360 / 365, FDL 30 / 35)When replacing Liquiphant II compact versions with FTL 51 C, select oneof the following options. Switch point will be the same when mounted vertically.DK Length type II, ECTFEDL Length type II, PFA (Edlon™)DM Length type II, PFA (RubyRed)DN Length type II, PFA (conductive)DS Length type II, Enamel
4 Electronic insert1 FEL 51, two-wire AC, 19 to 235 VAC2 FEL 52, three-wire DC, 10 to 55 VDC4 FEL 54, universal, 19 to 153 VAC or 19 to 55 VDC, DPDT relay5 FEL 55, two-wire DC, 11 to 36 VDC, 16 / 8 mA output, IS6 FEL 56, two-wire according to NAMUR (EN 50227), IS7 FEL 57, two-wire, PFM signal transmission, IS8 FEL 58, two-wire according to NAMUR (EN 50227), IS, with test push button
5 Housing / cable entryE4 Polyester housing, NEMA 4X / 1/2” NPTE5 Aluminum housing, NEMA 4X / 3/4” NPT 1.1 lb (0.5 kg)E6 SS housing, NEMA 4X / 1/2” NPT 0.2 lb (0.1 kg)E7 Aluminum housing, NEMA 4X / 3/4” NPT with separate connection
compartment 1.9 lb (0.9 kg)6 Additional options
A Additional options not selected7 Temperature spacer, 2nd line of defense
A Additional options not selectedB Temperature spacer 1.3 lb (0.6 kg)C 2nd line of defense (pressure-tight feed through) 1.5 lb (0.7 kg)
1 2 3 4 5 6 7 Basic weight
FTL 51 C
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Accessories
Transparent cover Transparent cover for the polyesterhousing, PA 12 plastic, 0.08 lb (0.04 kg) Part No.: 943461-0001
Housing cover with windowFor SS housing:
316L SS, glass window, 0.35 lb (0.16 kg) Part No.: 943301-1000With PC window (not for CSA, GP) Part No.: 52001403
FTL 51C
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Supplemental documentation
Isolating amplifier FTL 325P Technical Information1 or 3 channel switching units for Top Hat Rail mountingfor Liquiphant FTL 51 C with electronic insert FEL 57 TI 350F/24/aeIsolating amplifier FTL 325 N Technical Information1 or 3 channel switching units for Top Hat Rail mountingfor FTL 51 C with electronic insert FEL 56, FEL 58 TI 353F/24/aeNivotester FTL 375 P racksyst plug-in card TechnicalInformation; 1, 2 or 3 channel switching unit forLiquiphant M / S with electronic insert FEL 57 TI 360F/00/enNivotester FTL 375 N racksyst plug-in card TechnicalInformation; 1, 2 or 3 channel switching unit forLiquiphant M / S with electronic insert FEL 56 or FEL 58 TI 361F/00/enLiquiphant M 50/51, 50 H/51 H measuring sensor for levellimit detection in food and pharmaceuticals TI 328F/24/aeLiquiphant S FTL 70/71 measuring sensor for level limitdetection in high temperature liquids up to 538°F (280°C) TI 354F/24/aeFTL 51 C with electronic insert FEL 56, FEL 58Installation/operating instructions, FTL 51 C KA 162F/00/a6
United States
Endress+Hauser, Inc.2350 Endress PlaceGreenwood, IN 46143Phone: (317) 535-7138888-ENDRESSFAX: (317) 535-8498
