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. 549-619
Mfr. Part No.D4NS-4CF
BrandOmron
PHP2,363.27
Each
units
M20 Key 2NC/1NO Plastic 240V 250V 2NC/1NO - - - 4 D4NS - 30mm
RS Stock No. 861-4650
Mfr. Part No.D4NS-2CF
BrandOmron
PHP4,131.68
Each
units
G1/2 Key 2NC/1NO Plastic 240V 250V - - Yes - 4 D4NS - 96mm
RS Stock No. 625-0330
Mfr. Part No.AZ16-02ZVRK-M20
BrandSchmersal
PHP2,377.87
Each
units
M20 Key 2NC Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 - 30mm
RS Stock No. 305-1966
Mfr. Part No.XCSPA791
PHP5,729.57
Each
units
Screw Key 2NC Glass Fibre Reinforced PA 240V 250V - Preventa - - 8 XCSPA - 30mm
RS Stock No. 820-3500
Mfr. Part No.GKMA33
BrandHoneywell
PHP4,224.00
Each
units
Cable Key 1NC/1NO Glass Filled PET 240V 250V - - Yes - 2 GKM - 16mm
RS Stock No. 623-3060
Mfr. Part No.AZ16-03ZVRK-M20
BrandSchmersal
PHP2,201.14
Each
units
M20 Key 3NC Glass Fibre Reinforced Thermoplastic 230V 24V 3NC - - - 3 AZ16 - 30mm
RS Stock No. 625-0374
Mfr. Part No.AZ15ZVRK-M20
BrandSchmersal
PHP2,149.43
Each
units
M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS Stock No. 263-3624
Mfr. Part No.XCSA702
PHP12,878.67
Each
units
Screw Key 2NC/1NO Zamak 240V 250V 2NC/1NO Preventa - - 8 XCSA - 44mm
RS Stock No. 820-3507
Mfr. Part No.GKMB33
BrandHoneywell
PHP4,006.11
Each
units
Cable Key 1NC/1NO Glass Filled PET 240V 250V - - Yes - 2 GKM - 16mm
RS Stock No. 746-7292
Mfr. Part No.D4NS-4AF
BrandOmron
PHP3,989.97
Each
units
Screw Key 1NC/1NO Plastic - - - - - - 4 D4NS - 30.6mm
RS Stock No. 861-4641
Mfr. Part No.D4GS-N2T
BrandOmron
PHP3,928.19
Each
units
Cable Key 2NC Plastic 240V 250V 1NC - - - 2 D4GS 1NC 95.5mm
RS Stock No. 623-3048
Mfr. Part No.AZ16-02ZVRK-M20-2254
BrandSchmersal
PHP1,901.56
Each
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M20 Key 2NC Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 - 30mm
RS Stock No. 240-8232
Mfr. Part No.D4BS15FS
BrandOmron
PHP5,910.04
Each
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PG 13.5 Key 1NC/1NO Plastic 400V - 1NC/1NO - - - 4 D4BS - 43mm
RS Stock No. 549-558
Mfr. Part No.D4NS-8CF
BrandOmron
PHP6,040.62
Each
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M20 Key 2NC/1NO Plastic 240V 250V 2NC/1NO - - - 4 D4NS - 30mm
RS Stock No. 623-2972
Mfr. Part No.AZ15ZVRK-M20-2254
BrandSchmersal
PHP1,792.22
Each
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M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
PHP4,439.56
Each
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M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - Yes - 3 AZ16 1NO 30mm
RS Stock No. 840-2823
Mfr. Part No.SI-QS90MFF
BrandBanner
PHP9,975.14
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced PA 230V 24V - - Yes - 2 SI-QS90 - 33mm
RS Stock No. 549-574
Mfr. Part No.D4NS-9AF
BrandOmron
PHP7,577.39
Each
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M12 Key 1NC/1NO Plastic 240V 250V 1NC/1NO - - - 4 D4NS - 30mm
RS Stock No. 826-3880
Mfr. Part No.208026
BrandIDEM
PHP18,402.22
Each
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Cable Key 2NC/2NO Stainless Steel 240V - 2NC/1NO Kobra - - 4 K-SS-Ex 1NO 37.5mm
RS Stock No. 861-4644
Mfr. Part No.D4GS-N4R
BrandOmron
PHP4,313.90
Each
units
Cable Key 3NC Plastic 240V 250V 2NC - - - 2 D4GS 1NC 95.5mm