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. 826-3864
Mfr. Part No.222001
BrandIDEM
TWD1,049.00
Each
units
M16 Key 2NC - - Glass Fibre Polyester - 2NC - Kobra IP67 - 8 INCH-1
RS Stock No. 147-483
Mfr. Part No.GKMA13
BrandHoneywell
TWD2,892.00
Each
units
Cable Key 1NC/1NO - - Glass Filled PET 50V 1NC/1NO 50V - IP66, IP67 - 2 GKM
RS Stock No. 189-5300
Mfr. Part No.6018200007
TWD4,906.00
Each
units
Screw - 2NC (Guard Lock), 2NC (Inter Lock) Guard Lock, Inter Lock Yes Glass Fibre Reinforced Thermoplastic 24V 2NC (Guard Lock), 2NC (Inter Lock) 24V - IP67 - - SLC
RS Stock No. 179-4752
Mfr. Part No.HS6E-M44B05-G
BrandIdec
TWD6,466.00
Each
units
Cable Key 1NC (Lock Monitor), 1NC/1NC (Main), 2NC (Door Monitor) Spring Lock - - 250V 1NC (Lock Monitor), 1NC+1NC (Main), 2NC (Door Monitor) 30V - IP67 - - HS6E
RS Stock No. 185-7254
Mfr. Part No.M-TS (B201)
BrandIDEM
TWD7,075.00
Each
units
M6 Screw Key - Interlock - Die Cast Metal, Stainless Steel - - - - - - 2 M-TS
RS Stock No. 397-2166
Mfr. Part No.XCSA801
TWD2,742.00
Each
units
Screw Key 3NC - - Zamak 240V 3NC 250V Preventa IP67 - 8 XCSA
RS Stock No. 252-3757
Mfr. Part No.XCSA501
TWD11,194.00
Each
units
Screw Key 1NC/2NO - - Zamak 240V 1NC/2NO 250V Preventa IP67 - 8 XCSA
RS Stock No. 754-8304
Mfr. Part No.3SE5212-0RV40
BrandSiemens
TWD2,300.00
Each
units
M20 Key 1NC/1NO - - Metal 230V 1NC 230V Sirius IP66, IP67 - 5 3SE5
RS Stock No. 179-4735
Mfr. Part No.HS5D-12RNP
BrandIdec
TWD952.00
Each
units
PG13.5 Handle 1NO/2NC Interlock - Plastic (Head) 250V 1NO+2NC 30V - IP67 - - HS5D
RS Stock No. 623-3004
Mfr. Part No.AZ16ZVRK-M20-2254
BrandSchmersal
TWD1,048.00
Each
units
M20 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 3 AZ16
RS Stock No. 185-7259
Mfr. Part No.M-HS (D401)
BrandIDEM
TWD6,325.00
Each
units
M6 Screw Key - Interlock Yes Die Cast Metal, Stainless Steel - - - - - - - M-HS
RS Stock No. 185-7262
Mfr. Part No.M-BS (A101)
BrandIDEM
TWD5,718.00
Each
units
M6 Screw Key - Interlock Yes Die Cast Metal, Stainless Steel - - - - - - - M-BS
RS Stock No. 609-6754
Mfr. Part No.XCSPA691
TWD1,422.00
Each
units
Screw Key 1NC/1NO - - Glass Fibre Reinforced PA 240V 1NC/1NO 250V Preventa IP67 - 8 XCSPA
RS Stock No. 826-3906
Mfr. Part No.208007
BrandIDEM
TWD3,850.00
Each
units
M20 Key 3NC/1NO - - Stainless Steel 240V 3NC - Kobra IP67, IP69K - 4 K-SS
RS Stock No. 742-0748
Mfr. Part No.AZ 3350-12ZUEK
BrandSchmersal
TWD3,114.00
Each
units
Screw Key 2NC/1NO - Yes Aluminium 230V 2NC 24V - IP67 - 4 AZ3350
RS Stock No. 623-3082
Mfr. Part No.AZ 17-11ZRK
BrandSchmersal
TWD1,281.00
Each
units
M16 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 - 4 AZ17
RS Stock No. 826-3868
Mfr. Part No.222002
BrandIDEM
TWD2,132.00
Each
units
M12 Key 2NC - - Glass Fibre Polyester - 2NC - Kobra IP67 - 8 INCH-1
RS Stock No. 279-6400
Mfr. Part No.XCSTA791
TWD3,874.00
Each
units
Screw Key 2NC/1NO - - Glass Fibre Reinforced PA 240V 2NC/1NO 250V Preventa IP67 - 8 XCSTA
New
RS Stock No. 219-9207
Mfr. Part No.XCSPR952
TWD2,230.00
Each
units
Terminal Keyed 1 NC + 1 NC + 1 NO Solenoid - Plastic - - - - - - - Preventa Safety Detection
RS Stock No. 724-3695
Mfr. Part No.AZ 3350-12ZUEK-U90
BrandSchmersal
TWD3,114.00
Each
units
Screw Key 2NC/1NO - Yes Aluminium 230V 2NC 24V - IP67 - 4 AZ3350