Document Reference No.: ES_000011
ES-R-2x01-M RS232 to RS422 / RS485 Converter User Guide
Version draft
Clearance No.: ES#*
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©2009 EasySync Ltd.
12
3
Connections
3.1
RS422 Signal Wiring
3.1.1
RS422 Four-wire full-duplex
ES-R-2x01-M
Direction
RS422 Device
1
TxD- (A)
RxD- (A)
2
TxD+ (B)
RxD+ (B)
3
RxD+ (B)
TxD+ (B)
4
RxD- (A)
TxD- (A)
5
GND (C)
GND (C)
Table 3.1 – RS422 Wiring – Full Duplex Without Handshake
3.1.2
RS422 Four-wire full-duplex with handshaking
ES-R-2x01-M
Direction
RS422 Device
1
TxD- (A)
RxD- (A)
2
TxD+ (B)
RxD+ (B)
3
RxD+ (B)
TxD+ (B)
4
RxD- (A)
TxD- (A)
5
GND (C)
GND (C)
6
RTS- (A)
CTS- (A)
7
RTS+ (B)
CTS+ (B)
8
CTS+ (B)
RTS+ (B)
9
CTS- (A)
RTS- (A)
Table 3.2 – RS422 Wiring – Full Duplex With Handshake
Preliminary