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RailPro => RailPro Specific Help & Discussion => Topic started by: CPRail on January 24, 2026, 04:55:59 PM

Title: LM-3S-21 and Keep-Alives - Rapdio Mo'Power
Post by: CPRail on January 24, 2026, 04:55:59 PM
Hi Group,

Doing up my first Rapido loco with their Mo'Power "keep-alive" capacitors. I know you can hook up a PB-2 or a TCS Keep-Alive to Pin 16 (+) and Pin 20 (-), but seeing as this loco already has a "keep-alive" in it, I figured maybe I don't have to add one.

Got the module and speaker in, but the Mo'Power seems to be more like No'Power.  :-\

Has anyone done a Rapido loco with the Mo'Power unit or am I blazing new territory here?

For reference, this is a GMD-1 and here is a so-so photo of the stock set-up, with the Mo'Power unit highlighted. I can get better photos, just tell me what you need to see!

Thoughts?