ADLINK MIX-110 - Manual (Page 36)

24 Hardware Information
COM1/2 Connectors (DB-9)
COM1 RS-232/422/485 Mode Select (J3)
Pin # RS-232 RS-422* RS-485*
1 DCD-L TX- RTX-
2 RXD TX+ RTX+
3 TXD RX+ N/A
4 DTR-L RX- N/A
5 GND
6 DSR-L N/A
7 RTS-L N/A
8 CTS-L N/A
9 RI-L N/A
NOTE: NOTE:
*RS-422/485 signals supported on COM1 only. See COM1
Mode jumper settings below and 3.3 Board Layout on p. 26 for
J3 location.
Pins RS-232 RS-422 RS-485
1-2 Open Shorted Shorted
3-4 Open Shorted Open
5-6 Open Open Shorted
1
5
6