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15. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
(b) When turning off magnetic contactor by external sequence
1) Converter unit
When the Forced stop (EM1) of the converter unit is activated, the base circuit shuts off in the
operating drive unit, and the Main circuit off warning (AL.E9) is displayed on the drive unit. When the
Forced stop (EM1) of the converter unit is deactivated, the drive unit automatically restarts the
operation. Shut off the main circuit power supply concurrently with the turn OFF of the Forced stop
(EM1) of the converter unit and the Emergency stop (EMG) of the drive unit.
(Note 1)
Forced stop (EM1)
(Note 2)
(3s)
(3s)
Dynamic brake
Electromagnetic
brake interlock (MBR)
Base circuit
Servo motor speed
Converter main circuit
off warning
Main circuit power
supply
a)
ON
OFF
ON
OFF
ON
OFF
Invalid (ON)
Valid (OFF)
Existence
Nothing
Note 1. When setting up an electromagnetic brake at customer's side, make up a sequence which will
operate the electromagnetic brake as follow using the electromagnetic brake interlock (MBR).
ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated
2. There is delay caused by magnetic contactor built into the external dynamic brake (about 50ms)
and delay caused by the external relay.
a) in Figure When the forced stop is invalid, the converter main circuit off warning turns off.