Holding brake

The motors can be equipped as an option with permanent magnet holding brakes. These operate according to the quiescent current principle and open at a voltage of 24 VDC +6 / -10 % with > 10,000,000 switching cycles.

The holding brake installed is not suitable for service braking because there is no monitoring for wear and functionality by the servo terminal and configuration. This applies in particular to vertical axes.

Holding brake 1:

Safety measures for vertical axes must be applied

When operating vertical axes, appropriate additional measures must be taken; for example, including but not only:

    • additional redundant brake units
    • mechanical safeguards or interlocks
    • attachment of a balancing weight
    • Permanent magnet holding brakes alone are not approved for the protection of persons. In consideration of ISO 13849-1 and 13849-2, additional precautions must be taken for personal protection.
    • If the voltage is interrupted by emergency stop or power failure, the holding brake is conditionally permissible as a service brake. You can perform a maximum of 2000 emergency stops from a maximum of 3000 rpm with a maximum of three times the intrinsic inertia of the motor. These maximum values may vary due to increased load inertia.
    • The function of the holding brake can be checked with a torque wrench or with TwinCAT Scope.

    A holding brake blocks the rotor in the de-energized state. The holding brake increases the motor length and the rotor moment of inertia. The holding brake cannot be retrofitted and is mounted on the B bearing side of the motor.