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. 263-3624
Mfr. Part No.XCSA702
HK$744.11
Each
units
Screw Key 2NC/1NO Zamak 240V 250V 2NC/1NO Preventa - - 8 XCSA - 44mm
RS Stock No. 623-2972
Mfr. Part No.AZ15ZVRK-M20-2254
BrandSchmersal
HK$275.06
Each
units
M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS Stock No. 153-141
Mfr. Part No.GKNC21
BrandHoneywell
HK$653.33
Each
units
M20 Key 2NC/1NO Glass Filled PET 600V 250V 2NC/1NO - - - 4 GKN - 33mm
RS Stock No. 625-0374
Mfr. Part No.AZ15ZVRK-M20
BrandSchmersal
HK$227.38
Each
units
M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS Stock No. 826-3892
Mfr. Part No.204026
BrandIDEM
HK$2,627.77
Each
units
Cable Key 2NC/2NO Stainless Steel 250V 250V 2NC/1NO Kobra - - 8 KM-SS-Ex 1NO 44mm
RS Stock No. 623-2988
Mfr. Part No.AZ16ZVRK-M20
BrandSchmersal
HK$299.79
Each
units
M20 Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ16 1NO 30mm
RS Stock No. 279-6393
Mfr. Part No.XCSTA591
HK$316.08
Each
units
Screw Key 1NC/2NO Glass Fibre Reinforced PA 240V 250V 1NC/2NO Preventa - - 8 XCSTA - 30mm
RS Stock No. 666-4938
Mfr. Part No.XCSA502EX
HK$2,091.09
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 623-3054
Mfr. Part No.AZ16-12ZVRK-M20
BrandSchmersal
HK$356.39
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 1NO 30mm
RS Stock No. 623-3098
Mfr. Part No.AZ 17-11ZK
BrandSchmersal
HK$338.25
Each
units
M16 Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 4 AZ17 1NO 30mm
RS Stock No. 826-3915
Mfr. Part No.203007F
BrandIDEM
HK$508.74
Each
units
M20 Key 3NC/1NO Die Cast Metal 240V - 3NC Kobra Yes - 4 KM 1NO 43.5mm
RS Stock No. 147-534
Mfr. Part No.GKMD03
BrandHoneywell
HK$864.51
Each
units
M12 Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 623-3105
Mfr. Part No.AZ 17-02ZK
BrandSchmersal
HK$293.82
Each
units
M16 Key 2NC Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 4 AZ17 - 30mm
RS Stock No. 189-5308
Mfr. Part No.6018200003
HK$1,056.03
Each
units
Screw - NC/NO (Guard Lock), NC/NO (Inter Lock) Glass Fibre Reinforced Thermoplastic 240V 24V NC/NO (Guard Lock), NC/NO (Inter Lock) - Yes Guard Lock, Inter Lock - SLC - 44mm
RS Stock No. 263-3595
Mfr. Part No.XCSA502
HK$2,091.09
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 814-7015
Mfr. Part No.XCSMP79L2
HK$1,419.47
Each
units
Cable Key 2NC Polyamide 240V 250V - Preventa Yes - 1 XCSMP - 30mm
RS Stock No. 820-3500
Mfr. Part No.GKMA33
BrandHoneywell
HK$761.92
Each
units
Cable Key 1NC/1NO Glass Filled PET 240V 250V - - Yes - 2 GKM - 16mm
RS Stock No. 754-8281
Mfr. Part No.3SE5122-1QV10
BrandSiemens
HK$772.89
Each
units
M20 Key 2NC/1NO Metal 230V 24V 1NC Sirius - - 5 3SE5 2NO 37.8mm
RS Stock No. 189-5314
Mfr. Part No.3911742390
HK$52.85
Each
units
M4 Screw - - - - - - - - - - - - 9mm
RS Stock No. 179-4732
Mfr. Part No.HS5D-12RN
BrandIdec
HK$294.18
Each
units
G1/2 Handle 1NO/2NC Plastic (Head) 250V 30V 1NO+2NC - - Interlock - HS5D - 91mm
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