RS485/RS422
30
Wieland Electric GmbH | BA000917 | 01/2019 (Rev. B)
8.3
Expansion port connection RS485
Panel socket RJ45
Pin
no.
Signal
mark
Description
Direction
1
GND
Signal and supply ground
2
GND
Signal and supply ground
3
TxRx-
RS485 B (-)
Input/Output
4
TxRx+
RS485 A (+)
Input/Output
5
TxRx-
RS485 B (-)
Input/Output
6
RXD-
RS485 A (+)
Input/Output
7
+12 V EXT External power supply
8
+12 V EXT External power supply
Power supply is selected on the expansion port RS485 by means of a jumper.
The signals 3 – 5 and 4 – 6 are linked inside of the router.
If galvanic separation is required, the converter must have an external power supply.
Figure 18: The jumper
(default jumper posi-
tion) circuitry for
RS485 (left) and RS422
(right)
Table 18: Connection
of RS485 connector
Figure 19: : RS485
connector
NOTICE
NOTICE
