Wiring18 KW2M-A/X User's Manual4.8 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).◆How to connect a KW2M-A (2-wire) and a KW9M (3-wire)(Fig.1)Correct wiring○Incorrect wiring×Terminal Terminalstation station