Yaskawa Sigma-5 Safety Precautions for SGDV Servo Amplifier - Manual (Page 10)

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• Install the battery at either the host controller and the battery unit
of the encoder.
It is dangerous to install batteries at both 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.
• Take appropriate measures to ensure that the input power supply
is supplied within the specified voltage fluctuation range. Be par-
ticularly 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-cir-
cuiting in external wiring.
Failure to observe this caution may result in fire.
• Take appropriate and sufficient countermeasures for each 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, SERVOPACK,
and servomotor or cause it to explode.
• Wiring or inspection must be performed by a technical expert.
CAUTION