PowerWalker Modbus Card 2 - Manual (Page 3)

3
Modbus Card Quick Guide
V.2.5
4.3 RS-485 Resistance Configuration
4.4 Interface Configuration
RS-485 Pin Configuration
Pin
Function
4 RS-485 - B
5 RS-485 - A
8 GND
4.5 Connection
First, please use one RS485 to RS 232 converter or RS-485 to Modbus/TCP converter as media
converter between Modbus card and computer. Please follow below chart for wiring connection
between RJ45 and media converter:
Wiring connection between RJ45 and media converter
Function Bit # Setting Meaning
Push up
resistance
# 6
ON Enable (Default)
OFF Disable
Push down
resistance
# 7
ON Enable (Default)
OFF Disable
Terminate
resistance
# 8
ON Enable (Default)
OFF Disable