Using The Holding Brake - YASKAWA MECHATROLINK Sigma 2 Series User Manual

The dynamic brake is an emergency stop function. Do not repeatedly start and stop the servomotor
IMPORTANT
using the SV_ON/SV_OFF command or by repeatedly turning power ON and OFF.

6.5.2 Using the Holding Brake

The holding brake is used when a servodrive controls a vertical axis. In other words, a servo-
motor with brake prevents the movable part from shifting due to gravity when system power
goes OFF.
The brake built into the SGM H servomotor with brakes is a de-energization brake, which is used
IMPORTANT
only to hold and cannot be used for braking. Use the holding brake only to hold a stopped motor. Brake
torque is at least 120% of the rated motor torque.
Wiring Example
Use the SERVOPACK sequence output signal /BK and the brake power supply to form a
brake ON/OFF circuit. The following diagram shows a standard wiring example.
Power supply
Servomotor
Holding brake
Prevents the movable part from
shifting due to gravity when
system power goes OFF.
BK-RY
/BK+
+24V
/BK-
BK-RY Blue or
yellow
White
Brake Power Supply
BK-RY: Brake control relay
* 1. The output terminal allocated with Pn50F.2
* 2. Brake power supplies are available in 200-V and 100-V models.
6-39
SERVOPACK
L1
U
L2
V
L3 W
L1C
L2C
∗1
CN1-
∗1
CN1-
CN2
Red
Black
DC
∗2
6.5 Setting Stop Functions
Servomotor
with brake
A ( 1 )
B ( 2 )
M
C ( 3 )
D ( 4 )
E ( 5 )
BK
F ( 6 )
PG
6