YASKAWA SERVOPACK Sigma 7W Series Product Manual page 19

 Wait for six minutes after turning OFF the power supply 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 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 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.
 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 SER-
VOPACK 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.
 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.
 In places with poor power supply conditions, ensure that the input power is supplied within the
specified voltage range.
There is a risk of equipment damage.
 Provide sufficient shielding when using the SERVOPACK in the following locations.
• Locations that are subject to noise, such as from static electricity
• Locations that are subject to strong electromagnetic or magnetic fields
• Locations that are subject to radiation
• Locations that are near power lines
There is a risk of equipment damage.
 Configure the circuits to turn ON the control power supply to the SERVOPACK before the 24-V
I/O power supply.
If the control power supply to the SERVOPACK is turned ON after the external power supply, e.g.,
the 24-V I/O power supply, the outputs from the SERVOPACK may momentarily turn ON when the
power supply to the SERVOPACK turns ON. This can result in unexpected operation that may
cause injury or device damage.
 Provide emergency stop circuits, interlock circuits, limit circuits, and any other required safety
measures in control circuits outside of the SERVOPACK.
There is a risk of injury or device damage.
 If you use MECHATROLINK I/O Modules, use the establishment of MECHATROLINK communi-
cations as an interlock output condition.
There is a risk of device damage.
 Select the I/O signal wires for external wiring to connect the SERVOPACK to external devices
based on the following criteria:
• Mechanical strength
• Noise interference
• Wiring distance
• Signal voltage
CAUTION
xix