Connection method 1:
Terminal A is RS485+, terminal B is RS485-. Connnect A to A, B to B.
Note: RS485 port can communication through Modbus_RTU or X-NET. Please choose the mode
in XINJEConfig software. As the communication effect of RS485 port on the PLC is not better
than BD board, it is not recommended to use PLC RS485 port for X-NET communication.
Connection method 2:
There are four terminals including A, B, SG(signal ground), FG(shielded ground) on expansion
BD board XD-RS485-BD. Normally, X-NET needs to connect terminal A and B, the shielded
layer connects to FG. If there is requirements for anti-interference, such as motion control fieldbus,
it needs to connect terminal A, B, SG.
XD-RS485-BD has switch to set terminal resistor. The default setting is switch OFF(left) without
terminal resistor. If XD-RS485-BD is at the head or end of the filedbus, it needs to add 120ohm
terminal resistor at both end, the switch must be ON (right).
Note: RS485 port of XD-NE-BD can communication through Modbus_RTU or X-NET. Please
choose the mode in XINJEConfig software.
Connection method 3:
Connect through the expansion ED board on the left side of PLC.
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General