
5. ROUTER DESIGN
Connection of RS422 connector:
Pin
Signal
Description
Direction
1
RxD+
RS422 (+)
Output
2
RxD-
RS422 (-)
Output
3
TxD+
RS422 (+)
Input
4
TxD-
RS422 (-)
Input
Table 21: Connection of RS422 connector
Figure 42: RS485/422 connector
Selection of RS485 or RS422 can be performed using jumpers on the board. Positions
where jumpers have to be mounted are shown on the port (see figure below). Three jumpers
for RS485 interface or one jumper for RS422 interface are required.
Figure 43: Connection of jumpers
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