5. USER INTERFACES
Figure 27: RS-485: Connection to the router with data cable length more than 10 m
With an RS-485 data cable longer than 10m, it is necessary to use overvoltage protection
on the router side!
Connector Pinout in RS-422 mode
Figure 28: RS-485/422 connector
Panel socket RJ45 (RS-422 Mode)
Pin
Signal mark
Description
Data flow direction
1
SGND
Signal and power supply ground
2
SGND
Signal and power 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
Table 20: Connector pinout in RS-422 mode
ATTENTION! The power supply is selected on the module board using the jumpers.
If galvanic separation is required, the converter must use an external power supply.
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