User Manual of EM730/EM730E Series Inverter RS485 communication interface of host + terminal - terminal GND A+ GND A- A+ GND A- A- A+ GND A- A+ GND ON Inverter S1 OFF Inverter S1 OFF Inverter S1 OFF Inverter S1 Fig. 3-17 Wiring of Communication Terminals of Multiple Inverters Connection to the host via RS485/RS232 adapter for communication: Inverter A+ RS232 communicatio A- RS485/RS232 adapter n interface of S1 ON GND host Fig.
3-18 Communication Terminal Wiring 3.3.8 Wire and screw dimensions of control circuit In order to reduce the interference and attenuation of the control signal, the control signal connection cable should be less than 50 m long, and the distance between the control signal connection cable and power line should be greater than 30 cm. Use the twisted-pair shielded cable when analog signals are externally inputted. It is recommended to use the wire with a diameter of 0.5-1 mm 2 in the control circuit. The terminal block of the EM730/EM730E series inverter is composed of through-type control circuit terminals. Install it with the PH0 Phillips screwdriver.
The tightening torque should be 0.5N.m. 3.3.9 Precautions for control circuit wiring Connect the control circuit connection wires and other wires separately. Connect the control circuit terminals EA, EB, EC, and Y1 separately from other control circuit terminals. In order to avoid malfunction caused by interference, use the twisted shielded cables 45