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Samsung MOSCON-E7 User Manual
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3.Wiring 3-173.6.5 Cable length between inverter and motor• If the cable between the inverter and motor is long and the carrierfrequency is high, high-frequency current is leaked from the cable andperipheral devices. This may damage the inverter and peripheraldevices.• Adjust the carrier frequency as shown in table below.• To change the setting related to the carrier frequency, refer to theparameter setting of C1-01.Table 3.8 Cable length.vs. carrier frequencyCable length 30m max. 50m max. 100m max. More than100mCarrier frequency Less than10kHz Less than8kHz Less than4kHz Less than1kHzC1.01 10 8 4 13-18 MOSCON-E7 User’s Manual3.7 Precautions when wiring3.7.1 Control circuit wiring precautions• Separate the control circuit wiring (terminals 1 to 11) from main circuitwiring (terminals P/B, N, R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, +1,and +2) and other high-power lines.• Separate the control circuit terminals A1, B1 and C1 (contact outputs)from wiring for control circuit terminals (terminals 1 to 11).• Use twist-pair or shielded twisted-pair to prevent operating faults dueto noise. The maximum cable length is 50cm.Figure 3.10 Ends of twisted-pair cables3.7.2 Main circuit input/output wiring• Do not connect the main circuit power to output terminal U/T1,V/T2, and W/T3.• When the output terminals U/T1, V/T2, and W/T3 and motorterminals U, V, and W are connected, the forward rotation commandcauses the motor to rotate counter-clockwise from the view of loadside. To change the direction, switch any of two wires of U, V and W.Figure 3.11 Direction of motor’s rotation |
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