User`s manual

40 CMX34GS cpuModule BDM-610000082 Rev A
Table 21 COM A (RS-422) and COM B (RS-422)
1
1. Dual RS-485 mode with echo uses dual RS-422 mode pinout
Pin Signal Function In/Out DB-9
1 TXD1- COM A- Transmit Data (–) out 1
2TXD2-COM B - Transmit Data (–)out6
3TXD1+COM A - Transmit Data (+)out2
4TXD2+COM B - Transmit Data (+)out7
5 RXD1+ COM A - Receive Data (+) in 3
6 RXD2+ COM B - Receive Data (+) in 8
7 RXD1- COM A- Receive Data (–) in 4
8 RXD2- COM B - Receive Data (–) in 9
9,10 GND Signal Ground — 5
Table 22 COM A (RS-485) and COM B (RS-485)
Pin Signal Function In/Out DB-9
1D1-COM A- Data (–) in/out1
2 D2- COM B - Data (–) in/out 6
3 D1+ COM A - Data (+) in/out 2
4 D2+ COM B - Data (+) in/out 7
5—Reserved —3
6—Reserved —8
7—Reserved —4
8—Reserved —9
9,10 GND Signal Ground — 5