YASKAWA SGM series User Manual page 29

Always follow the specified installation method.
The Servopack generates heat. Install the Servo-
pack so that it can radiate heat freely. Note also
that the Servopack must be in an environment
free from condensation, vibration and shock.
Perform noise reduction and grounding properly.
If the signal line is noisy, vibration or malfunction
will result.
D Separate high-voltage cables from low-voltage cables.
D Use cables as short as possible.
D Use at least class 3 grounding (ground resistance
100Ω or below) for the Servomotor and Servopack.
D Never use a line filter for the power supply in the
motor circuit.
Conduct a voltage resistance test under the following conditions.
D Voltage: 1,500 Vrms AC, one minute
D Braking current: 20 mA
D Frequency: 50/60 Hz
D Voltage applied point: Between R, T terminals and
frame ground (connect terminals R and T securely.)
Use a fast-response type ground-fault interrupter.
For a ground-fault interrupter, always use a fast-
response type or one designed for PWM invert-
ers. Do not use a time-delay type.
Do not perform continuous operation under overhanging load.
Continuous operation cannot be performed by ro-
tating the motor from the load and applying regen-
erative braking. Regenerative braking by the Ser-
vopack can be applied only for a short period,
such as the motor deceleration time.
The Servomotor cannot be operated by turning the power ON and OFF.
Frequently turning the power ON and OFF causes
the internal circuit elements to deteriorate. Always
start or stop the servomotor by using reference
pulses.
2.1 Precautions
Provide sufficient clearance
Ambient
temperature:
0 to 55°C
Conduct a
dielectric
strength test
as described
on the left.
Ground-fault interrupter
GOOD
GOOD
Fast-response For PWM Time-delay
type inverter type
Servomotor
Regenerative braking
continuously applied
Servopack
Power
supply
Starting and stopping by
turning power ON and OFF
10 mm
2
POOR
17