3.8 RS485 Communication・When using 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)・Be sure to connect with daisy chain the RS485 transmission line between each unit.Do not use a splitter. (Fig. 1)・To avoid noise, separate the transmission line from high-voltage line (power supply, voltage line).◆How to connect KW2M-A (2-wire) and KW9M (3-wire)(Fig.1)Correct wiring○Incorrect wiring×Terminal Terminalstation stationBuy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com