Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5-66
5.4.4 Using the Holding Brake
The holding brake is used when a servodrive controls a vertical axis. In other words,
a servomotor with brake prevents the movable part from shifting due to the force of
gravity when system power goes OFF.
Note: The brake built into the servomotor SGMH with brakes is a de-energization brake, which is
used 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 servo amplifier contact output signal /BK and the brake power supply to
form a brake ON/OFF circuit. The following diagram shows a standard wiring
example.
*CN1-1 /BK+ and CN1-2 /BK- are the output terminals allocated at parameter Pn50F.2.
This output signal controls the brake when using a servomotor with a brake and does
Output /BK Brake Interlock Output
Speed/Torque Control,
Position Control
Servomotor
Prevents the movable part from
shifting due to gravity when
system power goes OFF.
Holding brake
M
BK
PG
Servomotor
with brake
A (1)
B (2)
C (3)
D (4)
E (5)
F (6)
U
V
W
CN2
Red
Black
Blue or
yellow
White
AC DC
BK-RY
BK-RY
+24V
Brake Power Supply
Power supply
Servo amplifier
L1
L2
L3
L1C
L2C
CN1-
1
CN1-2
/BK+*
/BK-*
(Provided by Customer)
BK-RY
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