153.6 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)・ For terminal stations of both side including the upper device, termination resistors should beconnected. KW9M Eco-POWER METER doesn’t have any built-in termination resistors.Connect 120Ω, 1/2W or more termination resistor between [A+] and [B-] of Eco-POWER METER thatis connected the end of RS485 transmission line. The RS485 transmission line shielded cable shouldbe grounded at the end KW9M Eco-POWER METER. (Fig. 1)・Be sure to connect with daisy chain the RS485 transmission line between each unit.Do not use a splitter. (Fig. 2)・To avoid noise, separate the transmission line from high-voltage line (power supply, voltage line).(Fig.1)◆How to connect KW9M and the other devices with 2-wire system(Fig.2)Correct wiring○Incorrect wiring×Terminal Terminalstation stationPhone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
