Yaskawa Σ-V Series AC Servo Drives Rotational Motor Analog Voltage Reference - Manual (Page 8)

viii
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 servomotor connec-
tion.
Failure to observe this caution may result in injury or fire.
• Securely connect the main circuit terminals.
Failure to observe this caution may result in fire.
• Do not bundle or run the servomotor main circuit cables together with the I/O signal cables or the
encoder cables in the same duct. Keep the servomotor main circuit 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.
• Install the battery in the battery unit of the encoder cable with a battery unit.
• 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.
• Be sure to observe the following precautions when wiring the SERVOPACK main circuit terminal
blocks.
• Do not turn the SERVOPACK power ON until all wiring, including the main circuit terminal blocks, has
been completed.
• Remove detachable power supply input connectors or motor connectors from the SERVOPACK before
wiring.
• Make sure that the wiring for both the main circuit power supply and control power supply is correct.
Incorrect wiring may cause damage.
• Make sure that the polarity of the input power supply is correct.
Incorrect polarity may cause damage.
• Always use the specified power supply voltage.
An incorrect voltage may result in fire or malfunction.
• Take appropriate measures to ensure that the input power supply is supplied within the specified
voltage fluctuation range.
An incorrect power supply may result in damage to the equipment.
• Install external breakers or other safety devices against short-circuiting in external wiring.
Failure to observe this caution may result in fire.
• Take appropriate and sufficient countermeasures for each form of potential interference when
installing systems in the following locations.
• Locations subject to static electricity or other forms of noise
• Locations subject to strong electromagnetic fields and magnetic fields
• Locations subject to possible exposure to radioactivity
• Locations close to power supplies
Failure to observe this caution may result in damage to the equipment.
• Do not reverse the polarity of the battery when connecting it.
Failure to observe this caution may damage the battery, the SERVOPACK or servomotor, or cause an explo-
sion.
• Wiring or inspection must be performed by a technical expert.
• Use a 24-VDC or 48-VDC power supply with double insulation or reinforced insulation.
• Failures caused by incorrect wiring or wrong voltage application in the brake circuit may damage
the equipment or cause an accident resulting in death or injury. Follow the procedures and instruc-
tions for wiring and trial operation precisely as described in this manual.
• 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 filter. For details, contact the manufac-
turer 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.