RS485/RS422
Wieland Electric GmbH | BA000917 | 01/2019 (Rev. B)
31
Circuit example of the equipment with a router with data cable length less than
10 m:
Circuit example of the equipment with a router with data cable length more than
10 m:
With a RS485 data cable more than 10m it is necessary to use overvoltage protection on
the router side!
8.4
Expansion port connection RS422
Panel socket RJ45
Pin
no.
Signal
mark
Description
Direction
1
SGND
Signal and supply ground
2
SGND
Signal and supply ground
3
RxD-
Receive data (-)
Output
4
RxD+
Receive data (+)
Output
5
TxD-
Transmit data (-)
Input
6
TxD-
Transmit data (+)
Input
7
+12 V EXT External power supply
8
+12 V EXT External power supply
Figure 20: Equipment
with a router with data
cable less than 10 m
Figure 21: Equipment
with a router with data
cable more than 10 m
NOTICE
Table 19: Connection
of RS422 connector
