Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 8)

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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 power supply terminal screws, control power supply terminal
screws, and servomotor connection terminal screws.
Failure to observe this caution may result in fire.
• Do not bundle or run the main circuit cables together with the input/output 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 input/output 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 cables for the SERVOPACK with a 400 V power supply (+24 V, 0 V) must be
no longer than 10 m.
• Do not touch the power terminals while the charge indicator 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.
• Observe the following precautions when wiring main circuit terminal blocks of the SERVOPACK.
• Remove the detachable main circuit terminal blocks from the SERVOPACK prior to wiring.
• Insert only one main power line per opening in the main circuit terminals.
• Make sure that no part of the core wire comes into contact with (i.e., short-circuit) adjacent wires.
• Install a battery at either the host controller or the SERVOPACK, but not both.
It is dangerous to install batteries at both ends simultaneously, because that sets up a loop circuit between the
batteries.
• 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. Be particularly careful in places where the power supply is unstable.
An incorrect power supply may result in damage to the product.
• 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 product.
• Do not reverse the polarity of the battery when connecting it.
Failure to observe this caution may damage the battery, the SERVOPACK, the servomotor, or cause an explo-
sion.
• Wiring or inspection must be performed by a technical expert.
• Use a 24-VDC power supply with double insulation or reinforced insulation.