Yaskawa Sigma Mini - Manual (Page 87)

2.4Setting Stop Mode
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2.4.3 Holding Brake
Holding brake is useful when a Servo Drive is used to
control a vertical axis. A Servomotor with brake pre-
vents the movable part from dropping due to gravita-
tion when the system power is turned OFF.
Note The Servomotor with brake has a built-in brake that is a de-energization operation type, which
is used for holding purposes only. The brake cannot be used to stop the motor. Use the hold-
ing brake only to retain a stopped motor. Brake torque is more than 100% of the rated motor
torque.
Connection Examples
Use Servopack contact output-signal /BK and brake power supply to form a brake ON/OFF
circuit.
The following diagram shows a standard connection example.
24VDC
0V (24V)
CN1-8
CN1-3
/BK
SG-COM
MAX
50mA
BK-RY
BK-RY
+24V
Power supply
Servopack Servomotor with brake
BK-RY: Brake control relay
BK
M
U
V
W
PG CN2
Output → /BK CN1-8
Brake Interlock Output For Speed/Torque
Control and
Position Control
This output signal controls the brake when a motor with brake is used. This signal terminal
need not be connected when a motor without brake is used.
2
Servomotor
Holding brake
Prevents movable
part from shifting
due to gravitation
when power is
turned OFF