Safety command devices

Your Benefits

  • Increased safety due to self-monitoring contacts
  • Reduction in accidental faults due to variants with a protective collar
  • User-friendly status indicator identified by a colored mark or LED ring around the pushbutton simplifies diagnostics
  • Successful down to the last detail: award-winning and appealing design


ES21 emergency stop pushbuttons are essential in automated machines and plants. They make it possible for someone to stop a machine or a system immediately in case of an emergency. Depending on the variant, the emergency stop pushbuttons are either integrated into a machine control panel, or mounted with their housings directly on the machines.

At a glance
  • Available either as a surface-mounted version with housing or as a built-in version (Ø 22 mm)
  • Built-in version for machine control panels with self-monitoring contacts between pushbutton and switching element
  • Surface-mounted version for direct mounting on different machines and systems
  • Variants with LED ring lighting
  • Optionally available with protective collar to prevent inadvertent actuation


Technical overview

  • Technical data overview

    Technical data overview

    Switch typeEmergency stop pushbutton
    Number of positive action N/C contacts1 / 2 / 3
    Number of N/O contacts0 / 1
    Housing materialPlastic
    Enclosure rating

    IP65 (IEC 60529)

    IP54 (IEC 60529)

    Emergency stop pushbutton (illuminable)– / ✔
    Connection typeCable gland, 2 x M20
All technical data can be found accompanying the individual product