Fail safe and fail secure dropbolts

Bolt unlock in case of power off (door unlocked)


  • Nickel-plated steel housing
  • Front panel in chrome-plated brass and stainless steel striker plate. (On request, adjustable chrome-plated brass striker plate for armoured profiles)
  • Cylindrical steel bolt, dia. 18 mm, extension 22 mm
  • Power supply: 12/24 V DC
  • Current consumption: 3 A pickup, 250 mA maintenance current at 12 V DC, 1.8 A pickup, 180 mA maintenance current at 24 V DC
  • Magnetic interior door sensor
  • Bolt position sensing via N.O./N.C. microswitch
  • Microprocessor controlled electronic current limiter
  • Maximum cycle frequency: 10 cycles/min
  • SMD control logic with microprocessor protected against polarity inversions, with the following functions:
    - N.O. button door open control
    - Emergency control (bolt permanently retracted)
    - Automatic closure, adjustable from 1 to 5 sec after door contact, or from 1 to 60 sec if the door is not opened
    - Configurable for cascade connection for control of 2 or more interlocked doors

Mechanical override:
Key or knob

Electronic operation:
Electrical pulse

For interior doors