User`s guide

DESCRIPTION
17
At RS485 data cable more then 10m it is need to use overvoltage protection
on the router side!
2.10.4. Connection of the XPORT Connector – RS422
Pin
number
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 +12V EXT External power supply
8 +12V EXT External power supply
ATTENTION! Power supply is selected on the expansion port RS422 by help
of a jumper, 2.12. If galvanic separation is required the converter must have an external
power supply.
Circuit example of the equipment with router with data length less then 10 m: