Safety-Rated Interlock Switches

Safety rated interlock switches are safeguarding measures designed to improve safety in situations where guards or gates are used around hazardous machinery or equipment.

What are safety rated interlock switches used for?

In industrial situations, safety rated interlock switches prevent or permit the use of machinery, depending on safety conditions. They allow current to pass to the machine when it is safe to operate, for example when the machine's guard is closed. And they cut off the power if there's a potential hazard, such as a guard being opened. When a dangerous piece of equipment such as a metalworking machine is in operation, safety rated interlock switch might be used to ensure safety gates remain closed, excluding workers from hazardous areas.

Types of safety rated interlock switches

Safety rated interlock switches vary according to their lock type, maximum current and voltage, as well as their housing material. Guard-locking switches prevent access to machine parts that may still be in motion, even when the power has been cut. Hinge switches will close protective gates and guards in unsafe conditions.


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Description Price Connection Type Lock Style Normal State Configuration Housing Material Maximum AC Voltage Maximum DC Voltage Safety Contacts Range Actuator Included Lock Type Number of Head Directions Series Auxiliary Contacts Depth
RS Stock No. 252-3864
Mfr. Part No.XCSPA591
TWD1,397.00
Each
units
- Key 1NC/1NO Polyamide 240V 250V - Preventa - - 8 XCSPA - 30mm
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
TWD2,530.00
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - Yes - 3 AZ16 1NO 30mm
RS Stock No. 757-9231
Mfr. Part No.D4NS-1BF
BrandOmron
TWD1,226.00
Each
units
Screw Key 2NC Plastic 240V 250V - - - - 4 D4NS - 30mm
RS Stock No. 609-6697
Mfr. Part No.XCSA711
TWD3,960.00
Each
units
Screw Key 2NC/1NO Zamak 240V 250V 2NC/1NO Preventa - - 8 XCSA - 44mm
RS Stock No. 133-0069
Mfr. Part No.XCSE73117
TWD15,342.00
Each
units
- - - Zamak 240V 250V 2NC Preventa Yes - - XCS-E - 146mm
RS Stock No. 189-5319
Mfr. Part No.6051201005
TWD1,533.00
Each
units
- - - Aluminium - - - - - - - - - 35.5mm
RS Stock No. 609-6704
Mfr. Part No.XCSB501
TWD4,407.00
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSB - 44mm
RS Stock No. 623-3076
Mfr. Part No.AZ16-12ZVRK-M20-2254
BrandSchmersal
TWD1,303.00
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 1NO 30mm
RS Stock No. 176-0019
Mfr. Part No.2TLA020051R5100
BrandABB Jokab
TWD3,147.00
Each
units
M12 - - PBT - 24V - Eden - Interlock - - - 75.2mm
RS Stock No. 189-5320
Mfr. Part No.6051201009
TWD1,533.00
Each
units
Screw - - - - - - - - - - SLC - -
RS Stock No. 185-7256
Mfr. Part No.M-TS (C301)
BrandIDEM
TWD7,075.00
Each
units
M6 Screw Key - Die Cast Metal, Stainless Steel - - - - - Interlock 2 M-TS - 109mm
RS Stock No. 132-9182
Mfr. Part No.XCSPA891
TWD5,379.00
Each
units
PG 11 Key 1NC/2NO Glass Fibre Reinforced PA 240V 250V 1NC/2NO Preventa Yes - 8 XCSPA - 94mm
RS Stock No. 744-8673
Mfr. Part No.570230
BrandPilz
TWD1,463.00
Each
units
Screw Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 240V - 2NC/1NO PSENmech Yes - 4 - - 33mm
RS Stock No. 766-1598
Mfr. Part No.XCSB502
TWD4,970.00
Each
units
- - 2NO/NC Zamak 240V 250V 2NO/NC Preventa Yes - - XCSB - 44mm
RS Stock No. 252-3757
Mfr. Part No.XCSA501
TWD6,730.00
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 263-3595
Mfr. Part No.XCSA502
TWD7,893.00
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 755-7935
Mfr. Part No.3SE5242-0QV40
BrandSiemens
TWD2,296.00
Each
units
M20 Key 2NC/1NO Plastic 230V 230V 2NC Sirius - - 5 3SE5 1NO 33mm
RS Stock No. 814-6993
Mfr. Part No.XCSC703
TWD13,111.00
Each
units
Cable Key 2NC/1NO Zamak 240V 250V - Preventa Yes - 8 XCSC - 44mm
RS Stock No. 181-1206
Mfr. Part No.106875 & LS-S02-ZB/X
BrandEaton
TWD1,561.00
Each
units
Screw - 2NC Insulated Material 415V 220V 2NC - No Power Lock 1 LS4 ZB - 33.4mm
RS Stock No. 147-506
Mfr. Part No.GKMB39
BrandHoneywell
TWD2,823.00
Each
units
Cable Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm