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5.4 Communication Port Connector
The serial communication is available via a 9 pins D connector (Jc) with the following pin assignment:
RS232
Pin | Function |
2Receive
3Transmit
5Common
When using an IBM XT as an host, pins 4 and 5 should be connected together on the 25 pins D connector (computer side). When using an IBM AT as an host, pins 7 and 8 should be connected together on the 9 pins D connector (computer side).
RS485
Pin | Function |
5Common
6,7 T/R -
8,9 T/R +
