Chapter 4 Motor shaft retention brake
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33
4-2-2 Not using a relay cable
If the optional relay cable for brakes (EWA-B
!!
-JST03-TMC) is not used, the customer must control
the brake power supply to the brake release coil and release retention coil.
Supply the power upon brake release and during brake release retention, as shown below.
Lead wire color
Applied voltage
Upon brake
release
Gray/Yellow
24VDC
10%
Blue/Yellow
During release
retention
Gray/Yellow
0VDC
Blue/Yellow
24VDC
10%
During brake use
Gray/Yellow
0VDC
Blue/Yellow
Supply the power to the coils according to the following time chart.
Control the power supply so that the duration in which the power is supplied to the brake release coil
(gray/yellow) is 100ms or less. The brake will not be released only by the power supply to the brake
release retention coil. To release the brake, also supply the power to the brake release coil.
Be careful not to exceed the number of allowable brake operations
(Refer to “4-1 Motor shaft retention brake specifications”).
If the number is exceeded, the retention torque drops and it cannot be
used as a brake.
Warning
The power supply to the brake must be controlled.
Control the power supply to the brake as described in “4-2 Controlling the brake power
supply.” If the current flows continuously to the attraction coil, the actuator burns due
to temperature rise, causing fire or electric shock.
Warning
Brake released
Brake ON
Brake release
Brake release retained
Brake release coil
Wiring: Gray/Yellow (GND)
Brake release retention coil
Wiring: Blue/Yellow (GND)
