Appendix
premo
en-37
4022-D045530
Revision: 02
9.4.21 Technical specifications of premo brake
The brakes installed in the actuators work on the basis of a permanent magnetic circuit. When the
power is off, the brake pads make contact and a holding torque is built up. When the power is on
the permanent magnetic field is compensated and the friction surfaces separate without residual
torque.
The brakes used are designed as holding brakes. The intended use is in applications where no
dynamic braking procedures must be initiated by the brakes in fault/free operation.
In emergency stop situations a dynamic braking procedure could be necessary. Observe the
effective torques in the braking procedure for your dimensioning.
The reduction of kinetic energy in dynamic braking procedures increases the abrasive wear on the
brake pads, which can change the magnetic circuit within the brake. This can change opening and
closing times and can result in the brake no longer reaching the specified holding torque or no
longer closing.
For additional information about dynamic braking in emergency stop situations, please contact our
sales department.
Observe the instructions given in Chapter 7.1.1 "Refreshment of holding brake" for fault free
operation.
The listed opening and closing times are noted without the use of an additional wiring of the brake.
To avoid interfering signals from the switching of the brake, in general an additional wiring, e.g.
in form of a varistor, should be added. Observe the requirements for this of the applied servo
controller manufacturer.
The holding brake used is not a safety brake and is not suitable for
personal protection or as a service brake.
PxG 1
PxG 2
PxG 3
Ratio
16 – 35 40 – 100 16 – 35 40 – 100 16 – 35 40 – 100
Unit
Static holding
torque at 120°C
Nm
1.30
0.52
2.34
1.30
7.28
2.34
Dynamic braking
torque
Nm
–
–
–
–
–
–
Supply voltage
V DC
24
24
24
24
24
24
Current at rated
rated voltage and
20 °C
A DC
0.46
0.42
0.50
0.46
0.71
0.50
Linking time
msec
≤ 8
≤ 10
≤ 20
≤ 8
–
≤ 20
Separation time
msec
≤ 35
≤ 18
≤ 50
≤ 35
≤ 60
≤ 50
Tbl-36: Technical specifications of premo brake
