Advantech MIC-770 V2 User Manual page 27

2.3.1.1 COM Connector
MIC-770 V2 provides two 9-pin D-sub connectors, offer RS-232/422/485 serial com-
municate interface ports. Default setting is ES-232, but this can be modified by BIOS
setting. You can find detailed setting methods in Chapter 3.
Note!
Can expand four more RS-232 via optional cables.
Table 2.2: COM Connector Pin Assignments
RS-232
Pin Signal Name
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Note!
NC represents "No Connection".
RS-422
Signal Name
Tx-
Tx+
Rx+
Rx-
GND
NC
NC
NC
NC
13
RS-485
Signal Name
DATA-
DATA+
NC
NC
GND
NC
NC
NC
NC
MIC-770 V2 User Manual