@gunrunnerjohn posted:Pete, it depends on the CCM. The "Odyssey" version has "duty cycle" output on pin-2 of the 10-pin connector. It's the signal to feed the Railsounds board to control the diesel ramping for RailSounds 4 boards. The "generic" or "all steam" CCM has serial data repeated on pin-2 of the 10-pin connector.
Don’t the diesel Railsounds 4 boards also need serial data for horn/bell and confirmation honks though?