YASKAWA SGD7S Product Manual page 88

4.1 Wiring and Connecting SERVOPACKs
4.1.1 General Precautions
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 Wait for at least six minutes after turning OFF the power supply (with a SERVOPACK for a
100-VAC power supply input, wait for at least nine minutes) and then make sure that the
CHARGE indicator is not lit before starting wiring or inspection work. Do not touch the
power supply terminals while the CHARGE lamp is lit after turning OFF the power supply
because high voltage may still remain in the SERVOPACK.
There is a risk of electric shock.
 Observe the precautions and instructions for wiring and trial operation precisely as
described in this document.
Failures caused by incorrect wiring or incorrect voltage application in the brake circuit may
cause the SERVOPACK to fail, damage the equipment, or cause an accident resulting in death
or injury.
 Check the wiring to be sure it has been performed correctly.
Connectors and pin layouts are sometimes different for different models. Always confirm the
pin layouts in technical documents for your model before operation.
There is a risk of failure or malfunction.
 Connect wires to power supply terminals and motor connection terminals securely with the
specified methods and tightening torque.
Insufficient tightening may cause wires and terminal blocks to generate heat due to faulty con-
tact, possibly resulting in fire.
 Use shielded twisted-pair cables or screened unshielded multi-twisted-pair cables for I/O
Signal Cables and Encoder Cables.
 Observe the following precautions when wiring the SERVOPACK's main circuit terminals.
• Turn ON the power supply to the SERVOPACK only after all wiring, including the main circuit ter-
minals, has been completed.
• If a connector is used for the main circuit terminals, remove the main circuit connector from the
SERVOPACK before you wire it.
• Insert only one wire per insertion hole in the main circuit terminals.
• When you insert a wire, make sure that the conductor wire (e.g., whiskers) does not come into
contact with adjacent wires.
 Install molded-case circuit breakers and other safety measures to provide protection
against short circuits in external wiring.
There is a risk of fire or failure.
 Whenever possible, use the Cables specified by Yaskawa.
If you use any other cables, confirm the rated current and application environment of your
model and use the wiring materials specified by Yaskawa or equivalent materials.
 Securely tighten cable connector screws and lock mechanisms.
Insufficient tightening may result in cable connectors falling off during operation.
 Do not bundle power lines (e.g., the Main Circuit Cable) and low-current lines (e.g., the I/O
Signal Cables or Encoder Cables) together or run them through the same duct. If you do not
place power lines and low-current lines in separate ducts, separate them by at least 30 cm.
If the cables are too close to each other, malfunctions may occur due to noise affecting the low-
current lines.
 Install a battery at either the host controller or on the Encoder Cable.
If you install batteries both at the host controller and on the Encoder Cable at the same time,
you will create a loop circuit between the batteries, resulting in a risk of damage or burning.
 When connecting a battery, connect the polarity correctly.
There is a risk of battery rupture or encoder failure.
CAUTION
NOTICE