Rs485 Communication - Panasonic KW2M-A User Manual

Wiring

4.8 RS485 Communication

・When using a shielded cable for the RS485 transmission line, ground one end.
Use a class D dedicated earth for grounding. Do not share a ground with other earth lines. (Fig. 1)
・Make sure to establish a daisy-chain connection with the RS485 transmission line between each unit.
Do not use a splitter. (Fig. 1)
・To avoid noise, separate the transmission lines from high-voltage lines (power supply, voltage line).
(Fig.1)
◆How to connect a KW2M-A (2-wire) and a KW9M (3-wire)
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Correct wiring
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Incorrect wiring
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KW2M-A/X User's Manual