Leading Manufacturer of Safety Interlock Switches and Machine Guard Safety Switch Devices for Automation and Process Safety

Compact Tongue Interlock Safety Switch Stainless Steel (MK1-SS)

The compact body is only 30mm wide with industry standard 22mm fixing centres, ideal for restricted spaces. The rotatable head provides up to 8 actuator entry positions.

  • Housing/Fixing: Compact, 18mm fixing profile
  • Contacts: 2 N/C + 1 N/O
  • Connection: Wired or M12 Quick Connect

NOTE: Replaceable contact blocks.

Part No.Part Description
224001MK1-SS M20 2NC 1NO
224001AMK1-SS M20 2NC 1NO – std actuator
224001FMK1-SS M20 2NC 1NO – flat actuator
224001PFMK1-SS M20 2NC 1NO PF actuator
224002MK1-SS ½NPT 2NC 1NO
224002AMK1-SS ½NPT 2NC 1NO – std actuator
224002FMK1-SS ½NPT 2NC 1NO – flat actuator
224002PFMK1-SS ½NPT 2NC 1NO PF actuator
224003MK1-SS QC M12 8way 2NC 1NO
224003AMK1-SS QC M12 8way 2NC 1NO – std actuator
224003FMK1-SS QC M12 8way 2NC 1NO – flat actuator
224003PFMK1-SS QC M12 8way 2NC 1NO PF actuator

Technical Data
TechnologyTongue Interlock (Non Locking)
Housing Material316 Grade Stainless Steel
Contact Configuration2 NC + 1 NO
Thermal Current (lth)10A
Overload protection fuse (fuse externally)10A. (FF)
Rated Insulation/Withstand Voltages600VAC/2500VAC
Actuator Travel/Force for Positive Opening6mm/12N
Actuator Entry Minimum Radius150mm Standard 100mm Flexible
Maximum Approach Withdrawal Speed600mm/s
Enclosure Protection IP67, IP69K (QC versions IP67 on connector)
Operating Temperature-25 ... +80 °C (105 °C for CIP/SIP Cleaning)
Vibration IEC 68-2-6 10-55Hz+1Hz Excursion: 0.35mm, 1 octave/min
Fixing2 x M4
Pollution Degree3
Short Circuit Overload ProtectionFuse externally 10A (FF)

Information with regard to UL Standards
EnclosureType 1
Electrical RatingPilot Duty A300 240V.ac 3A. 6,000 cycles
Maximum Ambient Temperature+40 °C
Use 16 - 12AWG stranded copper insulated conductors rated 90ºC minimum. (75C. ampacity).
Terminal tightening torque 7ibs ins (0.8Nm)
Intended for same polarity use and one polymeric conduit connection
Not suitable for connection to a rigid metal conduit system