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Comitronic-BTI SPEEDTRONIC N Safety Relay - Door unlocking control on motor shutdown


  • Time before dangerous failure : MTTFd = 100 years
  • Cycle before dangerous failure : B10d=100,000 at 5A
  • Risk duration: approx. 2…7s adjustable at front
  • Persistence : approx. 20mV to 700mV adjustable front
  • Motor power : up to 3x690 VAC
  • Protection for severed wires : yes
  • Protection against disconnection of motor coiling : yes
  • Safety contacts : 3x NO 8A/250V redundant
  • Diagnostics : 1x NF 8A/250V redundant parallel.
  • 1 PNP "OK" output indicating motor coiling presence.
  • 1 PNP "ERROR" output indicating a synchronization malfunction.
  • 1 "RS" system reset input.
  • Indicators : 3 LEDs for diagnostics
  • Reset : automatic
  • Mounting : symmetrical DIN 35mm rail on DIN 50022
  • Mounting : IP 54 electrical box
  • Electrical connection : Maximum 14AWG (2.08mm²) / 250V minimum
  • Temperature : -20°C…+60°C


The SpeedTronic detector is a zero-speed engine that allows unlocking movable. This module has three safety lines and a line NO auxiliary NC, each with a power cut 8A/250Vac. This product is compatible with variable frequency. It has two settings on the front (level and timer) to make it compatible with all engines on the market.

Zero speed control with lock release.

Door unlocking control on motor shutdown
Detection of asynchronous motors stoppage without external sensor
Removable terminals
Performance level with AWAX controller : PL = e
Safety category : 4

Additional Information

Manufacturer Comitronic - BTI
Product Name / Options Price (ex VAT)
Comitronic-BTI SPEEDTRONIC N CAT.4 Null Speed detector Relay 3NO+1NF Call for Prices