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The 300 Series are highly defeat-resistant interlock switches with a normally open circuit and coded actuators. These switches have five different housing styles with switching voltages up to 120 Volts.

Download PDF pages from the Product Catalog or detailed Installation Instructions under each product. (You will need Adobe Acrobat to view these files. To download a free copy, link to: www.adobe.com

NOTE: All dimensions listed are approximate. For precise dimensions, download catalog pages or installation instructions.

300 Series General Installation Instructions (PDF 32K)

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301 & 303 GuardSwitch   302 GuardSwitch
The 301/303 is a defeat resistant position sensor that works best in interlock applications where a switch override must be prevented.

3-1/8"(L) x 1-1/2"(H) x 3/4"(D)

Stainless Steel Enclosure

The 302 is the same as the 301 but comes with armored cable for applications where unprotected cable wires could be damaged.

3-3/8"(L) x 1-1/2"(H) x 3/4"(D)

Stainless Steel Enclosure

302 GuardSwitch – Interlock Switch (PDF 56K)
302 GuardSwitch Installation Instructions (PDF 648K)

 

371 GuardSwitch 381 & 383 GuardSwitch

This switch is a defeat resistant interlock/position sensor for an explosive environment. The enclosure is UL classified for: Class I, Group B,C,D; Class II, Group E,F,G; Class III, Divisions 1 & 2.

5 3/4"(L) x 2"(H) x 1-1/2"(D)

Explosion Proof,
Die Cast Aluminum Enclosure

This is a defeat resistant interlock/position sensor for conduit connections and easy installation.

4-3/4"(L) x 1-1/2"(H) x 1-1/2"(D)

Coated Aluminum Enclosure

381 & 383 GuardSwitch – Interlock Switch (PDF 60K)
381 & 383 GuardSwitch Installation Instructions (PDF 668K)

371 GuardSwitch – Interlock Switch (PDF 68K)
371 GuardSwitch Installation Instructions (PDF 684K)

 

391 & 393 GuardSwitch
The 391/393 is a seamless stainless steel defeat resistant interlock/position sensor that is ideal for heavy wash-down applications.

4-1/4"(L) x 1-1/4"(H) x 7/8"(D)

Stainless Steel Enclosure

391 & 393 GuardSwitch – Interlock Switch (PDF 60K)
391 & 393 GuardSwitch Installation Instructions (PDF 532K)