Rs485/422 Connector; Connection Of Rs485 Connector; Connection Of Rs422 Connector - Advantech SmartFlex SR307 User Manual

Connection of RS485 connector:

Pin Signal
1 TxRx+
2 TxRx-
3 TxRx+
4 TxRx-

Connection of RS422 connector:

Pin Signal
1 RxD+
2 RxD-
3 TxD+
4 TxD-
The selection of either RS485 or RS422 can be performed by using jumpers on the
board. The points where jumpers have to be mounted are shown on the port (see the fig-
ure below). Three jumpers are required for the RS485 interface or one jumper for the RS422
interface. The default configuration is RS485 with termination off.
Description
RS485 B (+)
RS485 A (-)
RS485 B (+)
RS485 A (-)
Table 22: Connection of RS485 connector
Description
RS422 (+)
RS422 (-)
RS422 (+)
RS422 (-)
Table 23: Connection of RS422 connector
Figure 43: RS485/422 connector
35
SmartFlex SR307
Direction
Input/Output
Input/Output
Input/Output
Input/Output
Direction
Output
Output
Input
Input