SMC Networks LECSB2-T Series User Manual

3. SIGNALS AND WIRING
3 - 61
3.10 Servo motor with a lock
3.10.1 Safety precautions
CAUTION
Configure an electromagnetic brake circuit which is interlocked with an external
emergency stop switch.
Servo motor
Electromagnetic brake
B
U
RA
Contacts must be opened when ALM (Malfunction)
or MBR (Electromagnetic brake interlock) turns off.
24 V DC
Contacts must be opened with the
EMG stop switch.
The electromagnetic brake is provided for holding purpose and must not be used
for ordinary braking.
Before operating the servo motor, be sure to confirm that the electromagnetic
brake operates properly.
Do not use the 24 V DC interface power supply for the electromagnetic brake.
Always use the power supply designed exclusively for the electromagnetic brake.
Otherwise, it may cause a malfunction.
When using EM2 (Forced stop 2), use MBR (Electromagnetic brake interlock) for
operating the electromagnetic brake. Operating the electromagnetic brake without
using MBR during deceleration to a stop will saturate servo motor torques at the
maximum value due to brake torque of the electromagnetic brake. This can result
in delay of the deceleration to a stop from a set value.
POINT
Refer to Chapter 15 for specifications such as the power supply capacity and
operation delay time of the electromagnetic brake.
Refer to Chapter 15 for the selection of a surge absorber for the electromagnetic
brake.
Note the following when the servo motor with an electromagnetic brake is used.
1) The electromagnetic brake will operate when the power (24 V DC) turns off.
2) The status is base circuit shut-off during RES (Reset) on. When you use the motor in vertical axis
system, use MBR (Electromagnetic brake interlock).
3) Turn off SON (Servo-on) after the servo motor stopped.
(1) Connection diagram
B2
B1
MBR
DOCOM
RA1
U
B
Servo motor
24 V DC
ALM
(Malfunction)
Servo amplifier
MBR
RA1
(Note 1)
(Note 2)
24 V DC
Note 1.
Create the circuit in order to shut off by interlocking with the emergency stop switch.
2.
Do not use the 24 V DC interface power supply for the electromagnetic brake.
Lock
Contacts must be opened when ALM (Malfunction)
and MBR (Electromagnetic brake interlock) turns
off.
Refer to section 3.10.3 when wiring for the circuit configuration.
driver

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English