Safety sensor on Reed contact basis with built-in relay

Safety sensor 171…

With built-in relay


The safety sensor with built-in relay 171K... monitors guard doors and protective covers on machines and systems to protect personnel. The combination of safety sensor and safety control electronics in one housing, saves a great deal of space since no additional safety control device is necessary in the switch cabinet. This is a space-saving and cost effective solution, particularly for small machines and systems.


  • Safety sensor on Reed contact basis with built-in relay
  • Connection type: cable outlet
  • Plastic housing M30 x 81 mm
  • Contact form: N.O./N.O with control contact
  • With LED display
  • Actuators 30420000.H and 30420000.V, 30420000/S.:

Front and side actuation

Operating distance (Sao) from 7 to 10 mm

Switch-off distance (Sar) from 18 to 21 mm

  • Temperature range from -25 °C to +75 °C
  • IP67 protection class (DIN EN 60529)
  • ETL Listed Mark and certified in accordance with ECOLAB® criteria
171K1B1 / 171K1B2 Product inquiry
operating voltage 24 V AC/DC ±10%
max. current consumption 50 mA
max. switching voltage safety output: 250 V AC/30 V DC
contr. output: 250 V AC/30 V DC
max. switching current safety output: 2,5 A
contr. output: 0,1 A
max. switching power safety output: 625/75 VA/W
contr. output: 25/ 3 VA/W
temperature range -25…+70°C
protection class IP 67
indication LED
magnet system 30420000
air gaps for reliable switching function a = > 0,5 mm ≤ 7 mm, b = 18 mm
magnet system 30420000S
air gaps for reliable switching function a = > 0,5 mm ≤ 10 mm, b = 21 mm
safety characteristics
PFHD 1 x 10-7 (1/h)
elobau worldwide
Download catalogue Machine Safety
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