YASKAWA SGM Series User Manual page 73

Application
5.6.3 Regenerative Unit
Single-phase 200 to 230 VAC
or 100 to 115 VAC
5
J Connecting a Regenerative Unit
The connections of the regenerative unit are shown below.
Figure 5.4 Regenerative Unit Connection Diagram
D A Regenerative unit is equipped with the following error detection functions:
• Detecting disconnection in the regenerative resistor.
• Detecting a damaged transistor in the regenerative unit.
• Detecting overvoltage.
D When one of these fault detection functions operates, the internal alarm relay is actuated,
and the circuit between output terminals C1 and C2 is opened.
D Form a sequence so that SERVOPACK power turns OFF when the alarm relay is actuated.
D Once the alarm relay is actuated, it takes two or three seconds until the system returns to
a normal state. This time is required for the main capacitor inside the SERVOPACK to
discharge.
D When using an external resistor, be sure to remove the jumper between Y4 and Y5 and then
connect the resistor between P/Y3 and Y4.
D Be sure to use an external resistor with a resistance of at least 50 Ω.
SERVOPACK
1Ry
3
Servo
alarm
4
1Ry
←Alarm
Regenerative Unit
(JUSP-RG08C)
5 -12
External resistor
Shorting jumper (Remove when
external resistor is used.)