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ProNet Series AC Servo User's Manual
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Safety Precautions
■ Do not connect the servomotor directly to the local electrical network.
Failure to observe this may result in damage to servomotor.
■ Do not plug or unplug connectors from servo drive when power is on.
Failure to observe this may result in damage to servo drive and servomotor.
■ Please note that even after power is removed, residual voltage still remains in the capacitor inside the servo drive. If
inspection is to be performed after power is removed, please wait 5 minutes to avoid risk of electrical shock.
■ Keep servo drives and other devices separated by at least 10mm.
The servo drive generates heat. Install the servo drive so that it can radiate heat freely. When installing servo drives
with other devices in a control panel, provide at least 10mm space between them and 50mm space above and below
them. Please install servo drives in an environment free from condensation, vibration and shock.
■ Perform noise reduction and grounding properly.
Please comply with the following instructions to avoid noise generated by signal lines.
1. Separate high-voltage cables from low-voltage cables.
2. Use cables as short as possible.
3. Single point grounding is required for the servomotor and servo drive (grounding resistance 100 Ω or below).
4. Never use a line filter for the power supply in the circuit.
■ Conduct a voltage resistance test for the servo drive under the following conditions:
1. Input voltage: AC 1500Vrms, 1 minute
2. Braking current: 100mA
3. Frequency:50/60Hz
4. Voltage applied point: Between L1, L2,L3 terminals and frame ground.
■ Use a fast-response type ground-fault interrupter.
For a ground-fault interrupter, always use a fast-response type or one designed for PWM inverters. Do not use a
time-delay type.
■ Do not make any extreme adjustments or setting changes of parameters.
Failure to observe this caution may result in injury or damage to the product due to unstable operation.
■ The servomotor cannot be operated by turning the power on and off.
Frequently turning the power ON and OFF causes the internal circuit elements to deteriorate, resulting in unexpected
problems. Always start or stop the servomotor by using reference pulses.