User Manual of EM730 Series Inverter Fig. 3-18 Communication Terminal Wiring 3.4.3 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 50m long, and the distance between the control signal connection cable and power line should be greater than 30cm. 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 mm2 in the control circuit. The terminal block of the EM730 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. 3.4.4 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 in the control circuit. The wiring distance should be less than 50m. Prevent the shield screen from contact with other signal lines and enclosures. The exposed shield screen can be wrapped with insulating tapes. It is prohibited to touch the ports and components of the control panel without static electricity protection measures. 49