CHAPTER 0 INTRODUCTION
0
■ Precautions on wiring
CAUTION
Never apply the commercial power supply to the U, V and W terminals of the servomotor.
It might cause fire and failure.
Do not connect the grounding (E) cable to the U, V and W terminals of the servomotor. Do not
connect the U, V and W terminals in inappropriate order.
It might cause fire or failure. Also there is a risk of damaging your mechanical equipment due to
motor malfunction.
Make sure to check if the motor cable is connected properly. If open phase faulty has been
occurred with the motor power cable wiring (U, V, and W), the motor will not rotate even if a
command is given, failing in detecting any alarm such as OL and OS.
When fabricating an encorder cable, be careful not to reverse the porality between BAT+ and BAT-.
If the battery is connected with wrong polarity, the both battery terminals may become short circuit,
generating abnormal heat or causing damage to the battery.
Never perform a dielectric, Megger or buzzer test to the encoder terminals.
Otherwise the encoder will be damaged.
To perform a dielectric, Megger or buzzer test to the U, V and W terminals of the servomotor,
disconnect the servo amplifier.
Do not connect encoder terminals in inappropriate order.
Otherwise the encoder and servo amplifier will be damaged.
In an adverse power supply environment, insert a protective device such as the AC reactor so that
the voltage fluctuation is contained within the rating.
Otherwise the servo amplifier will be damaged.
Install a circuit breaker or similar safety devices for short circuits in external wiring.
There is a risk of fire or failure.
Do not remove the cover or disconnect the cable, connector or optional device with the servo
amplifier turned on.
There is a risk of electric shock to human body, product operation stop, and burnout.
Use the servo system under the specified voltage range.
Do not tie signal cables or route them in the same duct with main power cable or servo amplifier
motor output cable.
Use the designated wiring material. In particular, use the option cable or equivalent for the encoder
cable.
Do not insert a phase advance capacitor, various filter, reactor or similar on the output side of the
servo amplifier.
The servo amplifier cannot be protected from ground fault fully.
GROUND
Be sure to connect the grounding terminal of the servo amplifier to a grounding electrode.
There is a risk of electric shock.
0-6 Safety Precautions
