YASKAWA SGD7S

4.4 Wiring Servomotors
4.4.4 Wiring the SERVOPACK to the Holding Brake
4-32
4.4.4 Wiring the SERVOPACK to the Holding Brake
* Install the surge absorber near the brake terminals on the Servomotor.
• If you use a Rotary Servomotor, select a Surge Absorber according to the brake current and
brake power supply. Refer to the following manual for details.
Σ-7-Series Peripheral Device Selection Manual (Manual No.: SIEP S800001 32)
• After the Surge Absorber is connected, check the time required to brake in your application.
The Surge Absorber may affect the time required to brake.
Configure the relay circuit to activate the holding brake for an emergency stop.
• The /BK (Brake) signal cannot be used with the default settings. You must allocate the output
signal. Refer to the following section for details.
Allocating the /BK (Brake) Signal on page 5-39
• If you use a 24-V brake, install a separate power supply for the 24-VDC power supply from
other power supplies, such as the one for the I/O signals of the CN1 connector. If the power
supply is shared, the I/O signals may malfunction.
Important
Relay Circuit Example
0V
Emergency stop
5 VDC to 30 VDC
SERVOPACK
Photocoupler
Servomotor with
Holding Brake
SERVOPACK
Surge Absorber
Power supply
BK-RY: Brake control relay
1D: Flywheel diode
M
BK
ENC
U
V
W
CN2
AC DC
BK-RY
BK-RY
+24 V
L1
L2
L3
L1C
L2C
(/BK+)
(/BK-)
CN1
Brake power supply
DC side
1D
0 V
*