MPC225-851 Series Panel PC User’s Manual
Hardware Installation
24
When COM1 is set to RS-422 or RS-485, the pin assignments are
listed below:
Signal Name
Pin #
RS-422
RS-485
1 TX- DATA-
2 TX+ DATA+
3 RX+
No
connector
4 RX-
No
connector
5
No connector
No connector
6
No connector
No connector
7
No connector
No connector
8
No connector
No connector
9 GND
GND
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