Table A–14 J4 – COM1, COM2 connectors
J4 – COM1/COM2 connector
COM1 COM2
RS-232
RS-232
Pin #
Signal
Pin #
Signal
1 DCD
11
DCD
2 DSR
12
DSR
3 RxD
13
RxD
4 RTS
14
RTS
5 TxD
15
TxD
6 CTS
16
CTS
7 DTR
17
DTR
8 RI
18
RI
9 Gnd
19
Gnd
10 Nc
20 nc
Table A–15 J5 – COM3, COM4 connectors
J5 – COM3/COM4 connector
COM3 COM4
RS-232
RS-232
Pin #
Signal
Pin #
Signal
1 DCD
11
DCD
2 DSR
12
DSR
3 RxD
13
RxD
4 RTS
14
RTS
5 TxD
15
TxD
6 CTS
16
CTS
7 DTR
17
DTR
8 RI
18
RI
9 Gnd
19
Gnd
10 Nc
20 nc
COM3 COM4
RS-422
RS-485
RS-422
RS-485
Pin #
Signal
Signal
Pin #
Signal
Signal
1 TX+ DATA+
11
TX+ DATA+
2 TX– DATA–
12
TX– DATA–
3
13
4
14
5
15
6
16
7 RX+
17
RX+
8 RX–
18
RX–
9 Gnd Gnd 19
Gnd Gnd
10 nc
nc
20 nc
nc
136