1 precautions for wiring, Caution – Yaskawa AC Servo Drives DC Power Input Sigma-5 Series User Manual
Page 31
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 connect a commercial power supply to the U, V, or W terminals for the ser-
vomotor connection.
Failure to observe this caution may result in injury or fire.
• Do not bundle or run the servomotor main circuit cables together with the I/O sig-
nal cables or the encoder cables in the same duct. Keep the servomotor main cir-
cuit cables separated from the I/O signal cables and encoder cables by at least
30 cm.
Placing these cables too close to each other may result in malfunction.
• Use shielded twisted-pair cables or screened unshielded twisted-pair cables for
I/O signal cables and the encoder cables.
• The maximum wiring length is 3 m for I/O signal cables, 50 m for servomotor main
circuit cables and encoder cables, and 10 m for power supply cables.
• Voltage remains in the SERVOPACK even after the power supply is turned OFF.
To prevent electric shock, do not touch the input terminals for the main circuit
power supply or those for the control power supply.
Before wiring or inspections, confirm that the SERVOPACK has completely discharged.
• When using a detector or a breaker for leakage current, select the appropriate
one by considering the grounding conditions and the leakage current of noise fil-
ter. 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.