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.

New products

PSR-MM20 over-speed and zero-speed safety relay

Over-speed and zero-speed safety relays

Safe motion monitoring

The PSR-MM20 safe over-speed and zero-speed safety relay is designed for motion monitoring. The PSR-MM20 detects the overspeed or zero speed of rotating parts in systems and machines.

Main features

  • Connection of two 3-wire PNP proximity switches
  • Monitoring of parameterizable speed thresholds
  • Flexible frequency setting up to 31.5 Hz (in 0.5 Hz increments) or up to 315 Hz (in 5 Hz increments)
  • Analog output (0 - 10 V) for monitoring speed values
  • 17.5 mm overall width

Your Advantages

  • Safe motion monitoring up to Cat. 4/PL e in accordance with EN ISO 13849-1 and up to SIL 3 in accordance with EN IEC 62061
  • Easy, software-free configuration directly on the device
  • Compatible with 3-wire PNP proximity switches as well as Pulsotronic push-pull proximity switches, making it very easy to meet sensor signal requirements

PSRmotion over-speed and zero-speed safety relay

PSRmotion over-speed and zero-speed safety relay

Compact motion monitoring without additional sensors

The sensor-free PSR-MM35 over-speed safety relay reliably monitors speeds to protect against dangerous motion. Based on the rotary field measurement of the drive, the integrated safety functions STO (Safe Torque Off), SLS (safely limited speed), SSM (safe speed monitor), and SSR (safe speed range) are reliably implemented up to SIL 3 or PL e.
With the PSR-MM25 zero-speed safety relay, machine zero speed is monitored without any additional sensors and an interlocking device can be actuated, for example. The zero-speed state is detected by evaluating the voltage induced in a motor winding.

  • Overall width of 12.5 mm
  • Safe motion monitoring up to SIL 3/PL e
  • Force-guided relay outputs
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.