Configuration Manual Synchronous Motors 1FK7 - Siemens ...

Motor Components (Options)
Holding brake
4.3 Holding brake
4.3.1 Features
• The integrated or mounted holding brake is used to clamp the motor shaft when the motor
is at a standstill. The holding brake is not a working brake that is used to brake a motor
that is still rotating.
• Motors with or without holding brake cannot be subsequently retrofitted!
Motors with holding brake are longer by the mounted space required (refer to the dimension
drawing).
• Restricted Emergency Stop operation is permissible.
Up to 2000 braking operations can be executed with 300% rotor moment of inertia as
external moment of inertia from a speed of 3000 RPM without the brake being subject to
an inadmissible amount of wear. The specific highest switching work for each emergency
braking operation may not be exceeded.
• The rated voltage of the holding brake is 24 V DC.
Caution
The rated voltage is 24 V DC +/- 10%. Voltages outside this tolerance bandwidth can result
in faults.
Inadmissible wear means that the braking function can no longer be guaranteed!
It is not permissible to exceed the above specified Emergency Stop conditions or to
repeatedly briefly accelerate the motor against a holding brake that is still closed. This
means that the switching times of the brakes and relays must be taken into account in the
drive control and enable functions.
1FK7 Synchronous Motors
4-10 Configuration Manual (PFK7), 10/2005 Edition, 6SN1197-0AD06-0BP1