Com1 port, Com2 port, Com1 port com2 port – NEXCOM APPC 1240T User Manual
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APPC 1240T/1245T/1540T/1740T/1940T User Manual
Chapter 2: Jumpers and Connectors
COM1 Port
Connector type: DB-9 port, 9-pin D-Sub
Connector location: CN10
COM2 Port
Connector type: DB-9 port, 9-pin D-Sub
Connector location: CN12
1
6
5
9
1
6
5
9
Pin
RS232
RS422
RS485
1
COM1_DCD
COM1_TXD-
COM1_TXD-
COM1_RXD-
2
COM1_RXD
COM1_TXD+
COM1_TXD+
COM1_RXD+
3
COM1_TXD
COM1_RXD+
Reserve
4
COM1_DTR
COM1_RXD-
Reserve
5
COM1_GND
COM1_GND
Reserve
6
COM1_DSR
COM1_RTS-
Reserve
7
COM1_RTS
COM1_RTS+:
Reserve
8
COM1_CTS
COM1_CTS+
Reserve
9
COM1_RI
(Could be a +5V
Power Pin)
COM1_CTS-
(Could be a +5V
Power Pin)
Reserve
(Could be a +5V
Power Pin)
Pin
RS232
RS422
RS485
1
COM2_DCD
COM2_TXD-
COM2_TXD-
COM2_RXD-
2
COM2_RXD
COM2_TXD+
COM2_TXD+
COM2_RXD+
3
COM2_TXD
COM2_RXD+
Reserve
4
COM2_DTR
COM2_RXD-
Reserve
5
COM2_GND
COM2_GND
Reserve
6
COM2_DSR
COM2_RTS-
Reserve
7
COM2_RTS
COM2_RTS+
Reserve
8
COM2_CTS
COM2_CTS+
Reserve
9
COM2_RI
(Could be a +12V
Power Pin)
COM2_CTS-
(Could be a +12V
Power Pin)
Reserve
(Could be a +12V
Power Pin)