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