Fail-safe principle

The fail-safe principle for electromagnetic spring-applied brakes is based on the requirement that the brake automatically switches to the closed state in the event of a power failure or malfunction. This is achieved by a constructive design in which the mechanical springs mechanically load the brake disks. In the regular operating state, the spring force is compensated by an electromagnetic field generated by an energized coil. The brake is released accordingly. If the power supply is interrupted, the magnetic field collapses, allowing the spring force to act unhindered and the brake to apply.

This design ensures that the braked component - such as a shaft, a drive or a load - is brought to a standstill reliably and without additional control pulses. The fail-safe principle is therefore a central element for functional safety in applications where uncontrolled continued operation of the machine could lead to hazards, such as in hoists, conveyor systems or rotating industrial equipment. The implementation of this principle meets the requirements for fail-safe systems in accordance with the relevant standards and directives.