Product Name : EK series
Product Description
Product Introduction


The EK series is a tongue (or key) operated safety interlock switch designed to fit at the leading edge of sliding, hinged or lift-off guards. With its dual entry slots and rotatable head, the versatile EK series can offer up to eight different actuator entry options. Operation of the switch is achieved through the insertion of a specially profiled stainless steel key that is permanently mounted to the guard door.

Available with one N.C. safety contact and one N.O. auxiliary contact or two N.C. contacts, the EK series is sealed to IP67 and has various conduit entries. A blanking plug is supplied for the unused key entry. Available accessories include a 90° actuator.


  • Fits on 25mm tubing, ideal for small, light weight guards
  • Contacts: Slow action 1N.C. /1N.O; 2N.C.; snap action 1N.C./1N.O.
  • Positive opening mechanism
  • Double-insulation structure
  • Eight possible actuator entry points, easy to install
  • 90° and straight key
  • IP65 enclosure rating
  • Robust stainless steel keys
EN60947-5-1, UL508, EN50047, EN1088
cULus, CE
Positive Opening Operation
NC Contact
Utilization Category
AC15 A600
Thermal Current (lth)
Rated Insulation Voltage
600V AC
Rated Impulse withstand Volt
2500V AC
Insulation Resistance
100MΩ min.(DC 500V)
Contact Resistance
25mΩ max.(Initial)
Travel For Positive Opening
Various (see Product Selection table)
Max Actuation Frequency
2 cycle/sec
Enclosure Material
UL approved glass-filled polybutylene terephthalate
Actuator Material
Stainless steel
Enclosure Protection
IP 65
Operating Temperature
Min -25℃(-18℉) Max 80℃ (+176℉)
Pollution Degree
Protection Against Electric Shock
Class II (Double Insulation)
Mech. Life Expectancy
1 x 106 Cycles min
Electrically Life Expectancy
150,000 Cycles min
IIEC 68-2-6, 10-55Hz±1 Hz, Excursion: 0.35mm, 1 octave/min
Conduit Entry
Various (see Product Selection table)
2 x M4
proimages/certification/UL.png  proimages/certification/CCC.png  proimages/certification/CE.png  proimages/certification/RoHS_compliant.JPG  proimages/certification/Limit_switch.jpg
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