YASKAWA Sigma-V Series User Manual page 12

 Wiring (cont'd)
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• Be sure to observe the following precautions when wiring the main circuit
terminals and connectors on a multi-winding drive unit, SERVOPACK, or
converter.
• Do not turn ON the power to a multi-winding drive unit, SERVOPACK, or con-
verter until all wiring, including the wiring to the main circuit terminals, has
been completed.
• Remove detachable main circuit terminals from the multi-winding drive unit,
SERVOPACKs, and converters prior to wiring.
• Insert only one 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-cir-
cuits) adjacent wires.
• Install a battery at either the host controller or the multi-winding drive unit
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.
• Always use the correct polarity (P and N) for the SERVOPACK and con-
verter.
Incorrect polarity may cause ruptures or damage.
• Take appropriate measures to ensure that the input power supply is sup-
plied 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, multi-winding drive unit,
or servomotor, or cause an explosion.
• Wiring or inspection must be performed by a technical expert.
• Use a 24-VDC control power supply with double insulation or reinforced
insulation.
CAUTION