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 Number of Head Directions Series Auxiliary Contacts
RS Stock No. 623-3004
Mfr. Part No.AZ16ZVRK-M20-2254
BrandSchmersal
TWD998.00
Each
units
M20 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 3 AZ16 1NO
RS Stock No. 666-4940
Mfr. Part No.XCSB502EX
TWD19,723.00
Each
units
Screw Key 1NC/2NO - - Zamak 240V 1NC/2NO 250V Preventa IP67 8 XCSB -
RS Stock No. 185-7252
Mfr. Part No.M-TS (A101)
BrandIDEM
TWD7,075.00
Each
units
M6 Screw Key - Interlock - Die Cast Metal, Stainless Steel - - - - - 2 M-TS -
RS Stock No. 744-8664
Mfr. Part No.570222
BrandPilz
TWD2,066.00
Each
units
Screw Key 2NC - Yes Glass Fibre Reinforced Thermoplastic 240V 2NC - PSENmech IP65 4 - -
RS Stock No. 337-3812
Mfr. Part No.GKCC1L6
BrandHoneywell
TWD7,193.00
Each
units
M20 Key 1NC/1NO - Yes Glass Filled PET 600V 1NC 250V - IP67 2 GKC 1NO
RS Stock No. 179-4741
Mfr. Part No.HS5L-DD44M-G
BrandIdec
TWD3,417.00
Each
units
M20 Key 1NC/1NC Spring Lock - Metal (Head) 250V 1NC+1NC 30V - IP67 - HS5L -
RS Stock No. 179-4727
Mfr. Part No.HS5D-03RNM
BrandIdec
TWD943.00
Each
units
M20 Handle 3NC Interlock - Plastic (Head) 250V 3NC 30V - IP67 - HS5D -
RS Stock No. 755-7948
Mfr. Part No.3SE5234-0QV40-1AE0
BrandSiemens
TWD2,974.00
Each
units
M20 Key 2NC - - Plastic 230V - 230V Sirius IP65 5 3SE5 2NC
RS Stock No. 623-2972
Mfr. Part No.AZ15ZVRK-M20-2254
BrandSchmersal
TWD1,078.00
Each
units
M20 Key 1NC - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 3 AZ15 -
RS Stock No. 625-0330
Mfr. Part No.AZ16-02ZVRK-M20
BrandSchmersal
TWD1,026.00
Each
units
M20 Key 2NC - - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 3 AZ16 -
RS Stock No. 189-5319
Mfr. Part No.6051201005
TWD1,533.00
Each
units
- - - - - Aluminium - - - - - - - -
RS Stock No. 179-4746
Mfr. Part No.HS5L-VC44M-G
BrandIdec
TWD3,720.00
Each
units
M20 Key 1NC/1NO (Lock Monitor), 2NC (Door Monitor) Spring Lock - Metal (Head) 250V 1NC/1NO (Lock Monitor), 2NC (Door Monitor) 30V - IP67 - HS5L -
RS Stock No. 179-4752
Mfr. Part No.HS6E-M44B05-G
BrandIdec
TWD6,158.00
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. 133-0077
Mfr. Part No.XCSDMP50010
TWD2,858.00
Each
units
10m Pre-Cabled - - - Yes Plastic - NC/3NO - Preventa IP66, IP67 - XCSDMP -
RS Stock No. 181-1214
Mfr. Part No.106828 & LS-S11-230AMT-ZBZ/X
BrandEaton
TWD8,599.00
Each
units
Screw - NO/NC Magnet Lock Yes Insulated Material 415V NO/NC 220V - IP65, IP66 1 LS ZBZ/X -
RS Stock No. 176-0019
Mfr. Part No.2TLA020051R5100 Adam DYN-Info M12-5
BrandABB Jokab
TWD3,304.00
Each
units
M12 - - Interlock - PBT - - 24V Eden IP67, IP69K - - -
RS Stock No. 698-8729
Mfr. Part No.EX-AZ 16-03ZVRK-3D
BrandSchmersal
TWD2,539.00
Each
units
Screw Key 3NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 3NC 24V - IP67 3 EX-AZ16 1NO
New
RS Stock No. 213-1660
Mfr. Part No.HS1T-VD44ZM-G
BrandIdec
TWD9,829.00
Each
units
- - 2NC Type 2 - - 250V - - - - - HS1T -
RS Stock No. 179-4730
Mfr. Part No.HS5D-03ZRNM
BrandIdec
TWD1,118.00
Each
units
M20 Handle 3NC Interlock - Metal (Head) 250V 3NC 30V - IP67 - HS5D -
RS Stock No. 814-7071
Mfr. Part No.XCSTA793
TWD2,584.00
Each
units
Cable Key 2NC/1NO - Yes Glass Fibre Reinforced PA 240V - 250V Preventa IP67 8 XCSTA -