Mitsubishi Electric MELSERVO-J3 Series Handbook page 220

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
c) When using an external sequence to control the magnetic contactor
When an alarm occurs, turn off the magnetic contactor using the external sequence, and shut
off the main circuit power supply.
Servo motor
speed
Drive unit
Control circuit
power supply
Converter unit
Control circuit
power supply
Main circuit
power supply
Base circuit
Electromagnetic
brake interlock
(MBR)
Servo-on command
(from servo system
controller)
Ready-on command
(from controller)
Position command
(Note 3)
Note 1. When setting up an electromagnetic brake at customer's side, make up a sequence which will
0 r/min
ON
OFF
ON
OFF
ON
OFF
ON
OFF
(Note 1) ON
OFF
ON
OFF
ON
OFF
0 r/min
operate the electromagnetic brake as follow using the electromagnetic brake interlock (MBR).
ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated
2. Give a position command after the external electromagnetic brake is released.
3. For the position control mode.
4. "Tb" is a delay time from when the electromagnetic brake interlock (MBR) is turned off until when
the base circuit is shut off at servo off. Set Tb using [Pr. PC02].
5. The base circuit remains ready-on status at servo-off. When the status is ready-off, the base circuit
and the servo-on command turn off at the same time. (Tb = 0)
(3 s)
(Note 2)
5 - 25
(Note 4, 5)
Tb
(95 ms)