Motor components
6.3 Holding brake (option)
Synchronous Motors 1FK7
Configuration Manual, (PFK7S), Edition 12.2006, 6SN1197-0AD16-0BP1
79
6.3 Holding brake (option)
6.3.1 Properties
• 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.
• 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 VDC.
Caution
The rated voltage is 24 VDC +/- 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.
Notice
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 drawings).
6.3.2 Brake types
Brakes with different principles of operation are used:
• Permanent-magnet brake
• Spring-operated brake
Both of the brake types operate according to the closed-circuit principle.
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