YASKAWA SGDV User Manual page 11

Wiring
• 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 connection.
Failure to observe this caution may result in injury or fire.
• Securely connect the main circuit power supply terminals and servomotor
connection terminals.
Failure to observe this caution may result in fire.
• Do not bundle or run the main circuit cables together with the I/O 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
I/O 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 (+24 V, 0 V) cables for a 400 V
input SERVOPACK must be no longer than 10 m.
• Do not touch the power terminals while the CHARGE lamp is ON after turn-
ing 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 terminals.
• Remove detachable main circuit terminals from the SERVOPACK prior to wir-
ing.
• Insert only one main circuit cable per opening in the main circuit terminals.
• Make sure that no part of the core wire comes into contact with (i.e., short-cir-
cuit) adjacent wires.
• Install a battery at either the host controller or the battery unit of the
encoder, 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 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.
CAUTION
xi