ES21 - Safety command devices

By SICK Pty Ltd

Quick, reliable emergency stop safety protection


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

  • Either as surface-mounted version with housing or as built-in version (Ø 22 mm)

  • Built-in version for machine control panels with self-monitoring contacts between the pushbutton and switching element

  • Surface-mounted version for direct mounting on different machines and systems

  • Rotational or key unlocking

  • Variants with LED ring lighting

  • Available with protective collar to prevent inadvertent actuation

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