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Reply to "Wiring power for TMCC ARC Module 6-14181."

Note that in a more modern setup, where you could use an LCS SER2, does (in theory) isolate the serial output.

http://www.lionel.com/products...rter-2-ser2-6-81326/

Support manual for SER2 https://www.lionelsupport.com/...50SER2UsersGuide.pdf

Again, what makes the SER2 different is the fact that with Legacy and Legacy Lite (CAB1L, and 990 set Legacy Base) is they need a power supply and Y cable to start the LCS chain. This is also partially why LCS since using an isolated supply then the LCS modules can be "common" to the track and not kill off the TMCC or Legacy signal. This separate power supply and cable system allows the modules to repeat the signal and be be isolated from the serial terminal of the base.

Specifically for the ARC, since it is a bi-directional com device (it not just receives commands, it sends them across the serial bus) it is a 3 wire TX and RX device.

And again, specifically an ARC 3 wire connection VS a receive only device 2 wire connection.

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