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Safety timers

Sentry TSR10 and Sentry USR models offer advanced timer functions such as off-delay, on-delay, time bypass and time reset. More information about these in the “Timer functions” tab below.
The time is set via the display, from 0 to 999 seconds with an accuracy of ± 1%.

Sentry TSR10 is suitable for e-stop buttons, safety switches and OSSD-devices.

Sentry USR10 and USR22 are suitable for most safety devices, i.e. emergency stop buttons, safety switches, OSSD-devices, two-hand devices and contact mats/bumpers/edges.

Main features

  • Up to PL e/SIL3
  • Advanced timer functions 0 to 999 seconds
    • Precision of 0.1 second up to 100 seconds and 1 second over 100 seconds
    • Accuracy of ± 1%
  • Simple configuration using display to select between preset configurations and custom configuration
  • Display with extensive status information
  • Removable terminal blocks
  • Extensive LED indication


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CAD drawings for all Safety Products are available here.