Reply to "Arduino TMCC signalling"

I have include a modified pic from the Legacy User manual that shows how I think the attachment between Arduino, Legacy Base, and a Lionel SER2 is accomplished. Would like to know if this is correct.

Second, I believe in this interconnection, the Tx of the Arduino and SER2 are connected together, then to the Rx of the Base. So if this correct, does the Base "echo" a serial command from Arduino to SER2? i.e.. does the Base receive the serial command from Arduino, then retransmit out so the SER2 would see the command. Example, I have DZ2500 switch machines connected to the SER2. I want to send a switch command from Arduino to DZ2500 via SER2. This would require Base to receive then retransmit switch command.

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8/13/212:52 PM

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