EM500 Open-Loop Vector Control Inverter User Manual 3.3.10 Control Circuit Cable and Screw Size The length of cable for transmitting control signal should be limited to 50 m and its distance from power cable should be greater than 30 cm, in order to reduce interference and attenuation of control signal. Please use shielded twisted-pair cable when analog signal is input externally. It’s recommended to use 0.5 - 1 mm 2 cable as the control circuit cable. Terminal block of EM500 inverter shall be through control circuit connection terminal. Please use a cross screwdriver PH0 for installation with tightening torque of 0.5 N.m.
3.3.11Attentions for Control Circuit Wiring Separate control circuit cable from other cable. Separate cable of control circuit terminals EA, EB, EC, Y1 and Y2 from the cable of other control circuit terminals. To prevent malfunctions caused by interference, use shielded twisted-pair cable for control circuit, with the wiring distance being less than 50m. Wrap exposed shield net with insulating tape to prevent the shield net from contacting other signal cable and housing of device. It’s not allowed to contact various ports or components without ESD measures. 3.3.12Standard Wiring of Control Circuit Standard wiring of control circuit of EM500 inverter is shown in Figure 3–22. 56