Acnodes PC 5170 User Manual page 158

RS-485 Mode
PIN Description
1 RTX-
3 RTX+
5 NC
7 NC
9 NC
CN20B: Serial Port DB-9 Male Connector (COM2)
COM2 supports three modes: RS-232, RS-422 and RS-485 (via DB-9 Connector).
RS-232 Mode
PIN Description
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
RS-422 Mode
PIN Description
1 TXD-
2 TXD+
3 NC
4 NC
5 NC
Page 154
PIN Description
2 NC
4 NC
6 NC
8 Voltage
10 NC
PIN Description
6 DSR
7 RTS
8 CTX
9 RI
PIN Description
6 RX-
7 RX+
8 NC
9 Voltage
PC 5170 Flat Panel PC
ACNODES ® Corp.