Ferrogard 1, 2, 20, 21 Non-contact Interlock Switches

The Ferrogard™ 1, 2, 20, and 21 Non-contact Interlock Switches have plastic rectangular housings, making them ideal for wet environments. The magnetically actuated safety switches offer non-contact reliability together with tolerance to misalignment.

Popular Resources/Quicklinks
Safety Switches Brochure Safety Switches Specifications Technical Data Ferrogard Installation Instructions


  • Non-contact actuation
  • High tolerance to misalignment
  • High switching current (2 A, 250V AC; 1 A, 24V DC)
  • Plastic rectangular housing (IP67)
  • Cable or quick-disconnect (QD) connections
Additional Information

Protect your people, productivity, and environment with our Safety Components and integrated Safety Solutions. We understand your factory floor challenges and can help you meet your goals with one of the broadest safety portfolios in the industry.


Product Selection


  • CE Marked for all applicable directives
Safety Classification
  • Cat. 1 Device per ISO13849-1
  • Dual channel interlocks suitable for Cat. 3 or 4 systems 
Functional Safety Data
  • B10d: > 2 x 106 operations at min.
  • PFHD: > 3 x 10-7
  • MTTFd: > 385 years
  • Dual channel interlock may be suitable for performance levels PLe or PLd (according to ISO 13849-1:2006) and for use in SIL2 or SIL3 systems (according to IEC 62061) depending on application characteristics
Standards Compliance
  • ISO 13849-1
  • IEC/EN 60204-1
  • NFPA 79
  • EN 1088
  • AS 4024.1
Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.


Resource Publication Number Language
Safety Switches Brochure GLSAFE-BR002
Safety Switches Specifications Technical Data SWITCH-TD001
Ferrogard Installation Instructions FERGRD-IN001
Literature LibraryLiterature Library
Literature Library

Browse Literature Library where you can search for additional technical and commercial publications in more languages.


Search Literature Library

KnowledgebaseKnowledgebase Support Center

Visit our online resource for technical information, support chat and forums, software updates and product safety advisories/notices.


Get Support