Trane TR200 Startup Procedure page 35

Control I/O Terminals
• Digital, analog, serial communication & relays
• Terminals 12
• Terminal 50
• Terminals 20,
Serial
communication
Digital I/O
and 13 are +24 VDC supply – digital (I/O)
is + 10 VDC supply – analog (I/O)
39 & 55 are common
Analog I/O
Relays