Hi guy's. I have an older K-Line PA-1 diesel set with TMCC and Railsounds "4" I believe. Can a ERR cruse board be added to it without taking another mortgage out to do it! Is it worth doing at all? I can live with the older TMCC and sound but cruse would be nice.
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Although I can't say 100% sure i think that since it's already a TMCC loco the modular upgrade board would work. The ERR board would simply replace the existing DCDR motor driver. Fairly easy install and not too expensive.
Call or email ERR and they can give you exact info.
You can add the ERR Cruise Commander M, they go for around $80-85. Boxcar Bill on the forum is an ERR dealer and has discounted prices. No problem at all, it's a very easy install.
Hey John. I'm not very familiar with ERR"s products. Cruse commander M 
That's the Cruise Commander for modular TMCC electronics. It directly replaces the DCDR motor driver board. Plug it in, add one wire to pin 24 of the R2LC, and you have cruise control.
This is from the ERR product page.
Cool Features:
Simple Tach-Less installation and operation
High Frequency (20khz) PWM for silent drive
DC motor capability (6 Amps)
Operates in command and conventional modes
CAB-1tm selectable 32 or 100(default) speed steps
Serial data out for configuration acknowledgement
Directly drives LED's lighting without complex "load" resistor wiring
LED's lighting features include markers and oscillating ditch lamps
On-board micro-controller provides future enhancement capabilities
Uses R2LC (not included) to be fully compliant with TMCC standards
Only 1.95" L x 1.27" W x 1.0" H
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