SMC Networks LECSN-T Series User Manual

3. SIGNALS AND WIRING
3 - 30
3.9 Servo motor with a lock
3.9.1 Safety precautions
CAUTION
Configure an lock circuit which is interlocked with an external emergency stop
switch.
Servo motor
Electromagnetic brake
B
U
RA
Contacts must be opened w hen ALM (Malfunction)
or MBR (Electromagnetic brake interlock) turns off.
24 V DC
Contacts must be opened w ith the
EMG stop sw itch.
The lock is provided for holding purpose and must not be used for ordinary
braking.
Before operating the servo motor, be sure to confirm that the lock operates
properly.
Do not use the 24 V DC interface power supply for the lock. Always use the power
supply designed exclusively for the lock. Otherwise, it may cause a malfunction.
When using EM2 (Forced stop 2), use MBR (Lock interlock) for operating the lock.
Operating the lock without using MBR during deceleration to a stop will saturate
servo motor torques at the maximum value due to brake torque of the lock. 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 lock.
Refer to Chapter 15 for the selection of a surge absorber for the lock.
Note the following when the servo motor with an lock is used.
1) The lock will operate when the power (24 V DC) turns off.
2) 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 lock.
(2) Setting
In [Pr. PC02 Lock sequence output], set a delay time (Tb) from MBR (Lock interlock) off to base circuit
shut-off at a servo-off as in the timing chart in section 3.9.2.
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 LECSN-T Series Specifications

General

Brand	SMC Networks
Model	LECSN-T Series
Category	Controller
Language	English