XtraDrive User Manual Appendix B: Special Wiring
B-3
5. To prevent malfunction due to noise, take the following actions:
• Position the input reference device and noise filter as close to the
servo amplifier as possible.
• Always install a surge absorber circuit in the relay, solenoid, and
electromagnetic contactor coils.
• The distance between a power line (such as a power supply line
or motor cable) and a signal line must be at least 11.8in (30cm).
Do not put the power and signal lines in the same duct or bundle
them together.
• Do not share the power supply with an electric welder or
electrical discharge machine. When the servo amplifier is placed
near a high-frequency oscillator, install a noise filter on the input
side of the power supply line.
Note: 1. Since the servo amplifier uses high-speed switching elements, signal lines may receive noise.
To prevent this, always take the above precautions.
2. For details on grounding and noise filters, refer to 5.8.2 Wiring for Noise Control.
6. Use a UL listed molded-case circuit breaker (MCCB) or fuse in
accordance with the National Electrical Code (NEC) to protect the
power supply line from high voltage.
• This servo amplifier connects directly to a commercial power
supply without a transformer, so always use an MCCB or fuse to
protect the servo system from accidental high voltage.
• Select an appropriate MCCB or fuse according to the servo
amplifier capacity and the number of servo amplifiers to be used
as shown in the following table.
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