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RailPro => RailPro Specific Help & Discussion => Topic started by: cws on November 06, 2026, 08:27:45 AM

Title: decoder strategy for multiple unit consists
Post by: cws on November 06, 2026, 08:27:45 AM

I have some recent 21-pin capable DCC-ready locos and I'm probably overthinking my options here... hence the question.

for an AB unit, where the B is never going to run on its own, would you still install a 21-pin decoder or do a 21-9 pin cable and then go with a LM-2 or LM-3?   

for the passenger options, where you'll probably run the locomotives in both directions, then you'd want a 21-pin option in both?
would the speakers in both locomotives be active or is the consist smart enough to only play sound through the lead?  even if it's an A-B-B-A configuration? 

thanks!

Carl