YASKAWA Sigma-7 Series Product Manual page 19

 Wiring and inspections must be performed only by qualified engineers.
There is a risk of electric shock or product failure.
 Check all wiring and power supplies carefully.
Incorrect wiring or incorrect voltage application to the output circuits may cause short-circuit fail-
ures. If a short-circuit failure occurs as a result of any of these causes, the holding brake will not
work. This could damage the machine or cause an accident that may result in death or injury.
 Connect the AC and DC power supplies to the specified SERVOPACK terminals.
• Connect an AC power supply to the L1, L2, and L3 terminals and the L1C and L2C terminals on the
SERVOPACK.
• Connect a DC power supply to the B1/
SERVOPACK.
There is a risk of failure or fire.
 If you use a SERVOPACK with the Dynamic Brake Hardware Option, connect an External
Dynamic Brake Resistor that is suitable for the machine and equipment specifications to the
specified terminals.
There is a risk of unexpected operation, machine damage, burning, or injury when an emergency
stop is performed.
 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 ter-
minals while the CHARGE lamp is lit because high voltage may still remain in the SERVOPACK
even after turning OFF the power supply.
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 contact,
possibly resulting in fire.
 Use shielded twisted-pair cables or screened unshielded multi-twisted-pair cables for I/O Sig-
nal Cables and Encoder Cables.
 The maximum wiring length is 3 m for I/O Signal Cables, and 50 m for Encoder Cables or Servo-
motor Main Circuit 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 termi-
nals, 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 con-
tact with adjacent wires and cause a short-circuit.
 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.
WARNING
and 2 terminals and the L1C and L2C terminals on the
CAUTION
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