YASKAWA SGD7S-1R9D Product Manual page 79

4.1 Wiring and Connecting SERVOPACKs
4.1.1 General Precautions
Important
To ensure safe, stable application of the Servo System, observe the following precautions when
wiring.
• Use the Cables specified by Yaskawa. Design and arrange the system so that each cable is
as short as possible.
Refer to the catalog for information on the specified cables.
• The signal cable conductors are as thin as 0.2 mm
excessive bending stress or tension.
4-4
 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.
 If you use an External Regenerative Resistor or External Dynamic Brake Resistor, use cable
ties, clamps, or other means to secure the resistor so that the connectors or terminal blocks
inside the SERVOPACK will not be affected even if the resistor is subjected to vibration or
shock.
There is a risk of SERVOPACK damage.
• Use a molded-case circuit breaker (1QF) or fuse to protect the main circuit. The SERVOPACK
connects directly to a commercial power supply; it is not isolated through a transformer or
other device. Always use a molded-case circuit breaker (1QF) or fuse to protect the Servo Sys-
tem from accidents involving different power system voltages or other accidents.
• Install an earth leakage breaker. The SERVOPACK does not have a built-in ground fault protec-
tive circuit. To configure a safer system, install a ground fault detector against overloads and
short-circuiting, or install a ground fault detector combined with a molded-case circuit breaker.
• Do not turn the power supply ON and OFF more than necessary.
• Do not use the SERVOPACK for applications that require the power supply to turn ON and
OFF frequently. Such applications will cause elements in the SERVOPACK to deteriorate.
• After you have started actual operation, allow at least one hour between turning the power
supply ON and OFF (as a guideline).
NOTICE
2
or 0.3 mm
2
. Do not subject them to