ESM Safety relays


EUCHNER ESM Safety Relays are designed to evaluate connected safety components and reliably turn off hazardous machine functions in the event of an unsafe condition. It will also ensure that the machine cannot be restarted until the unsafe condition is corrected and the module reset. This can be used to protect people, machinery and manufacturing processes. Up to safety category 4 (in accordance with EN954-1) and stop category 0 or 1 (in accordance with EN60204-1) can be achieved with the proper installation. Standard or time-delay expander modules as well as 2-hand control modules are available.

    You may also be interested in Emergency Stop Devices.   


  • Variety of safety relay modules available
    • Single or dual channel inputs
  • 35mm DIN rail mount
  • Expansion output module
  • Time delay module
    • 1 to 30 seconds delay
  • 2-hand control relay
    • For anti-tie down
  • CE
  • UL Listed


  • Available to 3 safety contacts and 1 auxiliary
  • Can switch up to 8 amps
  • Status LED's
  • Compact housing
    • As required by NFPA machine safety standard
    • As required by EM954,ENC0204-1
  • Coded plug in terminals on some models (ordered separately)
    • No wiring mistakes during servicing
  • Variations of non-contact CMS read heads are available for use with safety relays


  • Variety of voltages available
    • 24 VAC/DC
    • 115 V
    • 230V
  • Automatic reset or manual start selectable
  • Ground fault monitoring
  • Short circuit monitoring
  • Up to safety category 4
  • To stop category 0 or 1

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