Yaskawa Sigma-5 User Manual: Setup for Rotary Motors - Manual (Page 60)

3 Wiring and Connection
3-2
3.1
Precautions for Wiring
CAUTION
• Be sure to wire correctly and securely.
Failure to observe this caution may result in motor overrun, injury, or malfunction.
• Do not bundle or run the main circuit cables together with the I/O signal cables or
the encoder cables in the same duct. Keep them separated by at least 30 cm.
Failure to do so may result in malfunction.
• Use shielded twisted-pair wires or multi-core shielded twisted-pair wires for I/O
signal cables and the encoder cables.
• I/O signal cables must be no longer than 3 m, encoder cables must be no longer
than 50 m, and control power supply (+24 V, 0 V) cables for a 400 V input SER-
VOPACK must be no longer than 10 m.
• Do not touch the power terminals while the CHARGE lamp is ON after turning
power OFF because high voltage may still remain in the SERVOPACK.
Make sure the charge indicator is off first before starting an inspection.
• Leakage current may increase depending on the type of noise filter and the
grounding conditions.
When using a detector or a breaker for leakage current, select the appropriate
one by considering the type of noise filter and the grounding conditions.
For details, contact the manufacturer of the noise filter.
• Incorrect wiring or incorrect voltage application to the output circuit may cause
short-circuit.
The above failures will prevent the holding brake from working, which may damage the
machine or cause an accident resulting in death or injury.
• Inverting the polarity of the brake signal (/BK), i.e. positive logic, will prevent the
holding brake from working in case of its signal line disconnection.
If this setting is absolutely necessary, check the operation and confirm that there
are no safety problems.