ProNet Plus Series AC Servo User's Manual
1. The servomotor with the built in brake, is a de-energization brake. It is used to hold the servomotor and cannot be used
as a braking purposes. Use the holding brake only to hold a stopped servomotor.
2. When operating using only a speed loop, turn OFF the servo and set the input reference to 0V when the brake is
applied.
3. When forming a position loop, do not use a mechanical brake while the servomotor is stopped because the servomotor
enters servolock status.
(1) Wiring Example
Use the servo drive sequence output signal /BK and the brake power supply to form a brake ON/OFF circuit.
The following diagram shows a standard wiring example.
M
PG
BK
U
V
W
L1
L2
L3
L1C
L2C
*1
*2
CN1
Power supply
R
S
T
Servodrive
BK-RY
(/BK+)
(/BK-)
+24V
BK-RY
Brake power supply
Yellow or blue
White
Red
Black
AC
DC
Servomotor with brake
BK-RY：Brake control relay
1*、2*：The output terminals allocated with Pn511.
CN2
(2) Brake interlock output
This output signal controls the brake and is used only for a servomotor with a brake. This output signal is not used with
the factory setting.The output signal must be allocated by Pn511. It does not need to be connected for servomotor
without a brake.
(3) Allocating Brake Interlock Output (/BK)
Brake interlock output (/BK) is not used with the factory setting.The output signal must be allocated.
The /BK signal is output fromCN1-11,12.
The /BK signal is output from CN1-5,6.
The /BK signal is output from CN1-9,10.
The /BK signal is output from CN1-11,14.
The /BK signal is output from CN1-13,14.
■Important
When set to the factory setting, the brake signal is invalid.
For the allocation of servo drive output signals other than /BK signal, refer to 3.2.2 I/O Signal Names and Functions.
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