5. USER INTERFACES
Connector Pinout in RS-485 mode
Figure 25: RS-485/422 connector
Panel socket RJ45 (RS-485 Mode)
Pin
Signal mark
Description
Data flow 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
TxRx+
RS485 A (+)
Input/Output
7
+12 V EXT
External power supply
8
+12 V EXT
External power supply
Table 19: Connector pinout in RS-485 mode
ATTENTION! The power supply is selected on the module board using the jumpers.
In RS-485 mode, pins 3 and 5 and pins 4 and 6 are internally shorted together.
If galvanic separation is required, the converter must use an external power supply.
Figure 26: RS-485: Connection to the router with data cable length less than 10 m
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