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User’s Manual
ECM-3612 User’s Manual
33
2.3.7.3 Serial Port 2 Connector in RS-485 Mode
Signal PIN PIN Signal
DATA- 1 2 NC
DATA+ 3 4 NC
NC 5 6 NC
NC 7 8 NC
NC 9 10 NC
2.2.7.3.1 Signal Description – Serial Port 2 Connector in RS-485 Mode (CM4)
Signal Signal Description
DATA +/-
This differential signal pair sends and receives serial data to the communication
link. The mode of this differential signal pair is controlled through the RTS
register of Serial Port 2. Set the RTS register of the Serial Port 2 to LOW for
transmitting, HIGH for receiving.