4.6.2 Properties
Description
• The holding brake is used to clamp the motor shaft when the motor is at a standstill. The
holding brake is not a working brake for braking the rotating motor. When the motor is at a
standstill, the holding brake is designed for at least 5 million switching cycles.
• Restricted EMERGENCY-STOP operation is permissible.
WARNING
Unpredictable movements of the machine or system because of inadequate braking
performance
If you use the holding brake inappropriately, e.g. as an operating brake or you ignore the
permissible operating energy of the brake, then the brake will be subject to excessive and
impermissible wear. As a consequence, there may be no braking eect at all. Unintentional
movements of the machine or system can result in death or serious injury.
• Observe the permissible operating energy and EMERGENCY STOP properties.
• Operate the motor only in conjunction with an intact brake.
• Avoid repeated brief acceleration of the motor against a holding brake that is still closed.
• Do not exceed the maximum operating energy per emergency braking.
NOTICE
Premature wear of the motor holding brake when operated outside its permissible
voltage range
Operating the motor holding brake outside its permissible voltage range at the motor
connection will damage the brake.
• Ensure that the motor holding brake is only operated within its permissible voltage
range.
• The rated voltage of the holding brake is 24VDC +/- 10%. Voltages outside this tolerance
range can cause disturbances.
Note
Subsequent conversion of motors with or without a holding brake is not possible.
4.6.3 Technical specications
Technical data of the holding brakes
Note
The following data apply for control using 24VDC.
Mounting and options
4.6Holding brake
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 12/2023, A5E50610821B AF 51
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