Expansion Port Connection Rs422 - Wieland wienet LR77 v2 User Manual

7.4

Expansion port connection RS422

Panel socket RJ45.
Pin
1
2
3
4
5
6
7
8
Figure 22: RS422 port connector
NOTICE
Power supply is selected on the expansion port RS422 by means of a jumper.
If galvanic separation is required, the converter must have an external power supply.
Circuit example of the equipment with a router with data cable length less than 10 m
Figure 23: Circuit 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
Figure 24: Circuit equipment with a router with data cable length more than 10 m
NOTICE
With an RS422 data cable longer than 10 m it is necessary to use overvoltage protection on the
router side!
Wieland Electric GmbH | BA000917 | 08/2021 (Rev. C)
Signal Description
SGND Signal and supply ground
SGND Signal and supply ground
RxD- Receive data (-)
RxD+ Receive data (+)
TxD- Transmit data (-)
TxD- Transmit data (+)
+12 V EXT External power supply
+12 V EXT External power supply
Expansion port RS485/RS422
Direction
Output
Output
Input
Input
27