Moxa Technologies Industio C114HI, Руководство пользователя

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Pinouts and Cable Wiring
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Appendix A
45
A.3 RS-485
The pinouts of the RS-485 port are the same as RS-422 except that only TxD+,
TxD-, RxD+, RxD- and GND are used. The following lists pinouts of the RS-422
port.
C114HI DB-9 Male Connector C114HI Pin-head Connector
1 TxD-(A) 1 TxD-(A)
2 RxD+(B) 2 RxD+(B)
3 TxD+(B) 3 TxD+(B)
4 RxD-(A) 4 RxD-(A)
5 GND 5 GND
There are two operation modes for RS-485. Note that when jumper set to half
duplex, TxD+ with RxD+ and TxD- with RxD-
are shorted internally on board .
Only TxD+ and TxD- are good for connection.
1. Point-to-Point
Point-to-Point configuration means two devices located at two different places
can be linked together to communicate via RS-485 interface.
Point-to-Point RS-485 Half-Duplex Point-to-Point RS-485 Full-Duplex
C114HI Remote site C114HI Remote site
1 TxD- RxD- 1 TxD- RxD-
4 RxD- TxD- 4 RxD- TxD-
3 TxD+ RxD+ 3 TxD+ RxD+
2 RxD+ TxD+ 2 RxD+ TxD+
5 GND GND 5 GND GND
4
3
2
1
5
9
8
7
6
10
GND
RxD-
TxD+
RxD+
TxD-
9
8
7
6
G
Rx
Tx
Rx
Tx
5
4
3
2
1