10
Utility Functions
10.1.1
Holding Brake Function of the SERVOPACK
10-2
10.1 Controlling Vertical Axes
This section explains connection methods and parameter settings required to use the SERVOPACK
to control a vertical axis.
10.1.1 Holding Brake Function of the SERVOPACK
When using a SERVOPACK to control a vertical axis or an axis to which an external force is being
applied, a Servomotor with a brake must be used to prevent the axis from dropping or moving due to
gravity or the external force when the system power is turned OFF.
The holding brake of the Servomotor is controlled through the brake interlock output (/BK) signal
from the SERVOPACK. The brake is not controlled from the MP2300.
10.1.2 Connections to
Σ
-
II
/
III
SGDH or SGDS SERVOPACK
( 1 ) Example of a Brake ON and OFF Circuit
A circuit is configured to turn the brake ON and OFF using the /BK contact output signal from the
SERVOPACK and a brake power supply. The following diagram shows the standard connections.
• Vertical Axis • Axis Subject to External Force
Servomotor
Holding brake
External force
Servomotor
Preventing
movement due to
gravity when power is
OFF

The brake built into a Servomotor with a brake uses non-excitation operation and is for use as a holding
brake only. It cannot be used to control or stop axis movement. Use the holding brake only to hold the axis in
a stopped state after the motor has stopped. The torque of the brake is 100% or higher of the rated torque of
the motor.
M
BK
PG
U
V
W
CN2
Red
Black
White
AC DC
BK-RY
+24 V
L1
L2
L3
L1C
L2C
Brake power supply
*3
SGDM, SGDH, or SGDS
SERVOPACK
Power supply
27-
28-
/BK+
/BK-
A (1)
B (2)
C (3)
D (4)
E (5)
F (6)
BK-RY
∗
1
∗
2
∗
1
Blue or
yellow
Servomotor
with a brake
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