Safety interlock switch with guard door locking

  • IP67 (NEMA 6) enclosure to withstand water washdown
  • 4 contacts: 2 N/C safety + 1 contact for door position monitoring + 1 contact for lock monitoring
  • Rear manual release—allows unlocking of switch from inside of guarded area per ANSI/RIA R15.06
  • Narrow profile enables mounting to 2 in. square tubing or in applications with space restrictions


  • High locking force of 1,200 N (270 lb.) locks guard door shut until machine is safe to enter
  • Rotatable head—the rotatable head of the TL4019 provides 8 actuator entry positions to satisfy most installation requirements
  • Optional key release—this option on power-to-unlock models allows manual unlocking of the guard door
  • Optional slide bolt with integral door handle aids installation on sliding and swinging guard doors


Typical applications are on sliding guard doors and swinging guard doors that must remain locked until a signal is applied to the internal solenoid that unlocks the guard door.

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