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15. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
2) Drive unit
When the Emergency stop (EMG) of the drive unit is activated, the base circuit shuts off in the
operating drive unit, and the drive unit goes into the emergency stop status. If the drive unit becomes
emergency stop status, the magnetic contactor turns off and the main circuit power supply is shut off.
Electromagnetic brake
interlock (MBR)
(Note 1)
Base circuit
ON
OFF
Servo motor speed
Emergency stop
(EMG)
Invalid (ON)
Valid (OFF)
Main circuit
power supply
ON
OFF
(Note 2)
(3s)
(3s)
Dynamic brake
ON
OFF
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.