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Richard Jones October 2010
Everything you wanted (or didn’t want) to know about DCC
Richard Jones October 2010
I don’t like DCC because
• Its expensive • Needs special wiring• No good for small or large layouts, and
those in between• You need a computer • It takes away the fun
Richard Jones October 2010
DCC basics
• Origins in 1940’s but 1970’s before multiple train operation
• National Model Railway Association (NMRA) accepted LENZ proposals for standards
Richard Jones October 2010
DCC basics
• Each train/accessory is controlled separately
• Only train accessory selected will respond• Voltage on track is constant• Configuration Variables (CV’s)
Richard Jones October 2010
DCC Systems
• Entry systems – Bachmann, Hornby • Mid Range – LENZ, Digitrax • Up Market – ZTC
Richard Jones October 2010
DCC Systems Choice?
• How many trains?• How many will be running at once?• How many options (lighting, sound) will I
be running?• How many options do I want on my trains? • Do I want to operate accessories
(lights/signals) • Do I want a computer interface?
Richard Jones October 2010
Elements of DCC
• Controller• Command Station • Booster • Track • Decoder
Richard Jones October 2010
Controller
Richard Jones October 2010
Command station
Richard Jones October 2010
Booster
Richard Jones October 2010
Decoders
• train • Accessory
Richard Jones October 2010
Richard Jones October 2010
Richard Jones October 2010
DCC Operation
• Each train is independent • CV’s enable a wide range of options to be
programmed into each train (speed steps)• Accessories can be controlled from one
place• Potential for more realistic running and
further potential.
Richard Jones October 2010
DCC version 1(NMRA pre 1995)
• Limited CV’s (14 speed steps)• 99 addresses • Programming on separate track
Richard Jones October 2010
DCC version 2 (NMRA 1995)
• CV’s enhanced (14, 28, 128 speed steps)• 10,000 addresses • Programming on main• PC interface
Richard Jones October 2010
DCC version 3 (NMRA 2003)
WirelessTwo way transmission
Richard Jones October 2010
Two way transmission
Richard Jones October 2010
DCC version 3 (NMRA 2003)
• Two way transmission – means • Ability to read /write CV while train running• Able to locate train on layout, know speed,
and modify speed.• Use extended CV’s to determine speed,
fuel consumption and therefore control distance/length of activity.
• Make train stop!
Richard Jones October 2010
DCC Connecting PC
• Programme CV’s from computer – Decoder Pro (Freeware from Java Model Railroad Interface JMRI) http://jmri.sourceforge.net/download/
• Railroader – enables pre-programming of running of trains, points etc.
Richard Jones October 2010
I don’t like DCC because
• Its expensive • Needs special wiring• No good for small or large layouts, and
those in between• You need a computer • It takes away the fun
Richard Jones October 2010
DCC offers realistic operation and running
and is the future!