Acnodes FPC 5105 - Manual (Page 14)

Pin RS-232 RS-422 RS-485
1 DCD TX- Data-
2 RXD TX+ Data+
3 TXD RX+ N.C
4 DTR RX- N.C.
5 GND No use No use
6 DSR No use No use
7 RTS No use No use
8 CTS No use No use
9 RI No use No use
2.2.1 COM1&COM2 Connector
The COM1 and COM2 is a standard DB-9 connector. This connector is equipped with +5V level
power capability on DCD and +12V level on RI by setting JP10 and JP11. The pin assignment of
RS-232/RS-422/RS-485 is listed on the following table. If you need COM1 port to support RS-422
or RS-485 m ode, please refer to Jum per Settings
COM1(SBC87832)
1 5
6 10