Yaskawa SGDB User Manual
Page 29
2 . 1 Precautions
17
Always follow the specified installation method.
The SERVOPACK generates heat. Install the
SERVOPACK so that it can radiate heat freely.
Note also that the SERVOPACK must be in an en-
vironment 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
Ground the SERVOPACK ground terminal with the
resistance 100Ω or less 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: 1500 Vrms AC, one minute
D
Current limit: 100 mA
D
Frequency: 50/60 Hz
D
Voltage application points: Between r, t, R, S, T
terminals and frame ground (connect terminals
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
SERVOPACK can be applied only for a short peri-
od, 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
Provide sufficient clearance
Ambient
temperature:
0 to 55°C
10 mm
or
more
50 mm
or
more
Casing
SERVOPACK
Signal
line
Servomotor
100 Ω or less
Conduct a voltage
resistance test
under the condi-
tions given on the
left.
Ground-fault interrupter
Fast-response
type
For PWM
inverter
Time-delay
type
GOOD
POOR
GOOD
Servomotor
Do not apply regenerative
braking continuously.
Power
supply
SERVOPACK
Do not start or stop by
turning power ON and OFF.