Mitsubishi Electric MR-J2-03B5, Instruction Manual

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3. SIGNALS AND WIRING
3.6 Servo motor with electromagnetic brake
CAUTION
Configure the electromagnetic brake operation circuit so that it is activated not only
by the servo amplifier signals but also by an external forced stop (EM1).
CNP2
EM1
Servo amplifier
Circuit must be opened
during forced stop (EM1).
Servo motor
The electromagnetic brake is provided for holding purpose and must not be used
for ordinary braking.
POINT
Refer to the Servo Motor Instruction Manual for specifications such as the
power supply capacity and operation delay time of the electromagnetic
brake.
Note the following when the servo motor equipped with electromagnetic brake is used for applications
requiring a brake to hold the motor shaft (vertical lift applications):
1) The brake will operate when the forced stop switch on.
2) Switch off the servo-on command after the servo motor has stopped.
(1) Connection diagram
Configure up a circuit which switches off main circuit power and makes the electromagnetic brake
effective as soon as EM1-SG are disconnected at a forced stop.
For connection, use the optional MR-JRBRCBL M-H electromagnetic braked servo motor cable and
MR-JRBRCN electromagnetic brake contact connector set.
B1A 1
B1B 2
EM1
10m(32.8ft) or less
Servo amplifier
Connector set for electromagnetic
brake contact (option)
MR-JRBRCN
(Note)
CNP2
Servo motor
Cable for servo motor with
electromagnetic brake (option)
MR-JRBRCBL M-H
Note. Fit a snubber circuit to the forced stop contact. (Refer to Section 11.2.5)
CNP21
(2) Setting
Using parameter No.21 (electromagnetic brake sequence output), set the time delay (Tb) at servo-off
from electromagnetic brake operation to base circuit shut-off as in the timing chart in (3) in this
section.