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

Explosion Proof Non-Contact Safety Interlock Switch (WM1-Ex)

The WM1-Ex explosion proof safety interlock switch for use in hazardous environments are designed to interlock hinged, sliding or removable guard doors or hatches. All electrical components are fully encapsulated and encased with a stainless back plate to prevent tempering. The cable is protected with a stainless steel flexible conduit.

  • Housing Material: 316 Grade Stainless Steel, Mirror Polished
  • Contacts: 2NC + 1NO
  • Contact Rating: Up to 250V ac/dc 2.0A Max (Internally Fused)
  • Zones: 0, 20, 1, 21, 2, 22
  • Ex Marking: II 1G Ex ma IIC T6 Ga / II ID Ex ma IIIC T80 Da IP67*
Part No.Part Description
900101WM1-Ex-SS 5M ‘2NC 1NO’ 230Vac/24Vdc
900102WM1-Ex-SS 10M ‘2NC 1NO’ 230Vac/24Vdc

Important Note
Installation of all non-contact Ex Safety Switches must be in accordance with your machines risk assessment.

Technical Data
Housing Material316 Grade Stainless Steel
Recommended setting gap5mm
Tolerance to misalignment5mm in any direction from 5mm setting gap
Switching frequency1.0 Hz Maximum
Temperature rangeSee conditions of use
Enclosure protectionIP67 (Fully encapsulated)
Mechanical reliability (B10d)3.3 million operations at 100mA load
MTTFd470 years (Proof Test Interval 47 years)
Cable typePVC 7 core or 3 core 6.5mm O.D. Max.
Mounting boltsM4 Tightening torque 1.5 Nm

Ex Classification
II 1G Ex ma IIC T6 Ga
II 1D Ex ma IIIC T80C D