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 Lock Type Actuator Included Housing Material Maximum AC Voltage Safety Contacts Maximum DC Voltage Range IP Rating Hazardous Area Certification Number of Head Directions Series
RS Stock No. 625-0330
Mfr. Part No.AZ16-02ZVRK-M20
BrandSchmersal
kr 265,03
Each
Units
M20 Key 2NC - - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 - 3 AZ16
RS Stock No. 698-8723
Mfr. Part No.EX-AZ16-12ZVRK-M20-3D
BrandSchmersal
kr 501,71
Each
Units
Screw Key 2NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 ATEX 3 EX-AZ16
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
kr 478,20
Each
Units
M20 Key 2NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 - 3 AZ16
RS Stock No. 623-2972
Mfr. Part No.AZ15ZVRK-M20-2254
BrandSchmersal
kr 248,19
Each
Units
M20 Key 1NC - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 3 AZ15
RS Stock No. 623-3004
Mfr. Part No.AZ16ZVRK-M20-2254
BrandSchmersal
kr 265,03
Each
Units
M20 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 3 AZ16
RS Stock No. 623-2988
Mfr. Part No.AZ16ZVRK-M20
BrandSchmersal
kr 265,03
Each
Units
M20 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 3 AZ16
RS Stock No. 397-2150
Mfr. Part No.XCSA701
kr 867,39
Each
Units
Screw Key 2NC/1NO - - Zamak 240V 2NC/1NO 250V Preventa IP67 - 8 XCSA
RS Stock No. 410-7206
Mfr. Part No.SKI-U1Z M3
kr 320,96
Each
Units
Screw Key 1NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 240V 1NC/1NO - - IP65 - 4 SKI
RS Stock No. 623-3076
Mfr. Part No.AZ16-12ZVRK-M20-2254
BrandSchmersal
kr 311,15
Each
Units
M20 Key 2NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 - 3 AZ16
RS Stock No. 397-2166
Mfr. Part No.XCSA801
kr 867,39
Each
Units
Screw Key 3NC - - Zamak 240V 3NC 250V Preventa IP67 - 8 XCSA
RS Stock No. 623-3098
Mfr. Part No.AZ 17-11ZK
BrandSchmersal
kr 287,84
Each
Units
M16 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 4 AZ17
RS Stock No. 625-0374
Mfr. Part No.AZ15ZVRK-M20
BrandSchmersal
kr 246,23
Each
Units
M20 Key 1NC - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 3 AZ15
RS Stock No. 623-3054
Mfr. Part No.AZ16-12ZVRK-M20
BrandSchmersal
kr 311,15
Each
Units
M20 Key 2NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 - 3 AZ16
RS Stock No. 744-8673
Mfr. Part No.570230
BrandPilz
kr 339,49
Each
Units
Screw Key 1NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 240V 2NC/1NO - PSENmech IP65 - 4 -
RS Stock No. 754-8281
Mfr. Part No.3SE5122-1QV10
BrandSiemens
kr 1 096,70
Each
Units
M20 Key 2NC/1NO - - Metal 230V 1NC 24V Sirius IP66, IP67 - 5 3SE5
RS Stock No. 252-3864
Mfr. Part No.XCSPA591
kr 389,83
Each
Units
- Key 1NC/1NO - - Polyamide 240V - 250V Preventa IP67 - 8 XCSPA
RS Stock No. 826-3874
Mfr. Part No.223001
BrandIDEM
kr 362,56
Each
Units
M16 Key 2NC/1NO - - Glass Fibre Polyester - 2NC - Kobra IP67 - 8 INCH-3
RS Stock No. 410-7212
Mfr. Part No.SKT-U1Z M3
kr 303,95
Each
Units
Screw Key 1NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 240V 1NC/1NO 250V - IP65 - 4 SKT
RS Stock No. 279-6400
Mfr. Part No.XCSTA791
kr 464,60
Each
Units
Screw Key 2NC/1NO - - Glass Fibre Reinforced PA 240V 2NC/1NO 250V Preventa IP67 - 8 XCSTA
RS Stock No. 623-3082
Mfr. Part No.AZ 17-11ZRK
BrandSchmersal
kr 287,84
Each
Units
M16 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 4 AZ17