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 Actuator Included Housing Material Maximum AC Voltage Safety Contacts Maximum DC Voltage Range Lock Type IP Rating Number of Head Directions Series Auxiliary Contacts
RS Stock No. 625-0374
Mfr. Part No.AZ15ZVRK-M20
BrandSchmersal
SGD61.16
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
SGD64.07
Each
units
M20 Key 2NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 3 AZ16 1NO
RS Stock No. 625-0330
Mfr. Part No.AZ16-02ZVRK-M20
BrandSchmersal
SGD56.73
Each
units
M20 Key 2NC - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 3 AZ16 -
RS Stock No. 623-3098
Mfr. Part No.AZ 17-11ZK
BrandSchmersal
SGD46.79
Each
units
M16 Key 1NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - - IP67 4 AZ17 1NO
RS Stock No. 623-3060
Mfr. Part No.AZ16-03ZVRK-M20
BrandSchmersal
SGD54.18
Each
units
M20 Key 3NC - Glass Fibre Reinforced Thermoplastic 230V 3NC 24V - - IP67 3 AZ16 -
RS Stock No. 698-8723
Mfr. Part No.EX-AZ16-12ZVRK-M20-3D
BrandSchmersal
SGD101.63
Each
units
Screw Key 2NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 3 EX-AZ16 1NO
RS Stock No. 625-0504
Mfr. Part No.AZ 17-02ZRK
BrandSchmersal
SGD44.85
Each
units
M16 Key 2NC - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 4 AZ17 -
RS Stock No. 623-3048
Mfr. Part No.AZ16-02ZVRK-M20-2254
BrandSchmersal
SGD51.64
Each
units
M20 Key 2NC - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 3 AZ16 -
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
SGD119.51
Each
units
M20 Key 2NC/1NO Yes Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 3 AZ16 1NO
RS Stock No. 623-3076
Mfr. Part No.AZ16-12ZVRK-M20-2254
BrandSchmersal
SGD54.18
Each
units
M20 Key 2NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 3 AZ16 1NO
RS Stock No. 742-0748
Mfr. Part No.AZ 3350-12ZUEK
BrandSchmersal
SGD124.66
Each
units
Screw Key 2NC/1NO Yes Aluminium 230V 2NC 24V - - IP67 4 AZ3350 1NO
RS Stock No. 623-2988
Mfr. Part No.AZ16ZVRK-M20
BrandSchmersal
SGD54.46
Each
units
M20 Key 1NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - - IP67 3 AZ16 1NO
RS Stock No. 698-8729
Mfr. Part No.EX-AZ 16-03ZVRK-3D
BrandSchmersal
SGD114.61
Each
units
Screw Key 3NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 3NC 24V - - IP67 3 EX-AZ16 1NO
RS Stock No. 623-3082
Mfr. Part No.AZ 17-11ZRK
BrandSchmersal
SGD46.88
Each
units
M16 Key 1NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - - IP67 4 AZ17 1NO
RS Stock No. 623-3004
Mfr. Part No.AZ16ZVRK-M20-2254
BrandSchmersal
SGD45.32
Each
units
M20 Key 1NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - - IP67 3 AZ16 1NO
RS Stock No. 623-3105
Mfr. Part No.AZ 17-02ZK
BrandSchmersal
SGD47.23
Each
units
M16 Key 2NC - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - - IP67 4 AZ17 -
RS Stock No. 623-2972
Mfr. Part No.AZ15ZVRK-M20-2254
BrandSchmersal
SGD48.67
Each
units
M20 Key 1NC - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - - IP67 3 AZ15 -
RS Stock No. 724-3695
Mfr. Part No.AZ 3350-12ZUEK-U90
BrandSchmersal
SGD140.58
Each
units
Screw Key 2NC/1NO Yes Aluminium 230V 2NC 24V - - IP67 4 AZ3350 1NO
RS Stock No. 623-3032
Mfr. Part No.AZ16-03ZVRK-M20-2254
BrandSchmersal
SGD54.18
Each
units
M20 Key 3NC - Glass Fibre Reinforced Thermoplastic 230V 3NC 24V - - IP67 3 AZ16 -
RS Stock No. 211-1499
Mfr. Part No.AZ 17-11ZI-B5
BrandSchmersal
SGD83.65
Each
units
M16 Key 1NC/1NO - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - - IP67 4 AZ17 1NO