Over-speed safety relays and zero-speed safety relays

Zero-speed and over-speed safety relays

Excessive speeds pose a danger to people and machinery. The compact PSRmotion over-speed safety relays and zero-speed safety relays monitor and disconnect rotating parts safely in the event of an emergency. The switching devices are compatible with all common sensor types and can be configured and commissioned particularly quickly using buttons on the product or using software.

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New products

Safe, sensorless PSR-MM35 over-speed safety relay
Safe over-speed safety relay
Sensorless motion monitoring

The safe PSR-MM35 over-speed safety relay reliably monitors speeds and thus protects against dangerous motion. You can monitor motion very economically and efficiently without any additional sensors.

These are the main features

  • Cost savings up to 50% with no need of additional sensors for speed measurement
  • Maximum availability, as the rotary field measurement of the drive is independent of external disruptive factors such as shock, vibration, and EMC
  • Fast commissioning with intuitive configuration software and no need for mounting and adjusting additional sensors

These are the advantages

  • Safe motion monitoring based on rotary field measurement of the drive up to SIL 3 / PL e
  • Integrated safety functions: STO (Safe Torque Off), SLS (Safely Limited Speed), SSM (Safe Speed Monitor), SSR (Safe Speed Range)
  • Overall width of 12.5 mm

PSRmotion over-speed safety relays and zero-speed safety relays

Over-speed safety relays and zero-speed safety relays for reliable motion monitoring

Speed and zero-speed monitoring in one device

With the PSR-MM30 combined over-speed and zero-speed safety relay, you can monitor up to three different operating modes in addition to zero-speed mode. The PSR-MM30 ensures high system availability with its reliable measuring procedure.

  • Overall width of 22.5 mm
  • Compatible with modern safety encoders up to SIL 3
  • Motion detection via encoder or proximity switch
  • Force-guided relay outputs, parameterizable signal outputs
  • Live monitoring with the PSRmotion software
  • Startup via USB connection
  • Integrated safety door monitoring ensures compatibility with PSRswitch safety switches
  • Up to PL e and SIL 3
PSRmotion software for over-speed safety relays and zero-speed safety relays

PSRmotion software for over-speed and zero-speed safety relays

Live monitoring via PSRmotion software

Our over-speed and zero-speed safety relays can be started up, parameterized, and monitored conveniently with the PSRmotion software.
In live measuring mode, you can visualize the motion sequences of your machine.
You can download the Windows-based software free of charge. The software is then adapted via a USB interface.

PSRmotion zero-speed safety relays

PSRmotion zero-speed safety relays with an overall width of 12.5 mm

Compact zero-speed monitoring without additional sensors

The narrow PSR-MM25 zero-speed safety relay monitors machines for zero-speed situations without the need for additional sensors and actuates an interlocking device, for example. The zero-speed state is detected by evaluating the voltage induced in a motor winding.

  • Overall width of 12.5 mm
  • Easy startup via configuration button
  • Can be used for machines with and without frequency converters
  • Force-guided relay outputs, two signal outputs