Yaskawa SGDS Sigma III Servo Amplifier - Manual (Page 9)

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Wiring
• Do not connect a three-phase power supply to the U, V, or W output terminals.
Failure to observe this caution may result in injury or fire.
• Securely connect the power supply terminal screws and motor output terminal screws.
Failure to observe this caution may result in fire.
• Do not bundle or run power and signal lines together in the same duct. Keep power and signal lines
separated by at least 30 cm (11.81 in).
• Use twisted-pair shielded wires or multi-core twisted pair shielded wires for signal and encoder (PG)
feedback lines.
The maximum length is 3 m (118.11 in) for reference input lines and is 20 m (787.40 in) for PG feedback lines.
• Do not touch the power terminals for five minutes after turning power OFF because high voltage may still
remain in the SERVOPACK.
Make sure the charge indicator is out first before starting an inspection.
• Avoid frequently turning power ON and OFF. Do not turn power ON or OFF more than once per minute.
Since the SERVOPACK has a capacitor in the power supply, a high charging current flows for 0.2 seconds when
power is turned ON. Frequently turning power ON and OFF causes main power devices like capacitors and fuses to
deteriorate, resulting in unexpected problems.
• Observe the following precautions when wiring main circuit terminal blocks.
• Remove the terminal block from the SERVOPACK prior to wiring.
• Insert only one wire per terminal on the terminal block.
• Make sure that the core wire is not electrically shorted to adjacent core wires.
• Do not connect the SERVOPACK for 100 V and 200 V directly to a voltage of 400 V.
The SERVOPACK will be destroyed.
• Install the battery at either the host controller or the battery case of the encoder.
It is dangerous to install batteries at both simultaneously, because that sets up a loop circuit between the batteries.
• Be sure to wire correctly and securely.
Failure to observe this caution may result in motor overrun, injury, or malfunction.
• Always use the specified power supply voltage.
An incorrect voltage may result in burning.
• 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 brakers or other safety devices against short-circuiting in external wiring.
Failure to observe this caution may result in fire.
CAUTION