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. 252-3864
Mfr. Part No.XCSPA591
TWD1,526.00
Each
units
- Key 1NC/1NO - - Polyamide 240V - 250V Preventa IP67 8 XCSPA -
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
TWD2,570.00
Each
units
M20 Key 2NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 3 AZ16 1NO
RS Stock No. 153-141
Mfr. Part No.GKNC21
BrandHoneywell
TWD2,719.00
Each
units
M20 Key 2NC/1NO - - Glass Filled PET 600V 2NC/1NO 250V - IP67 4 GKN -
New
RS Stock No. 219-9202
Mfr. Part No.XCSPA892
TWD1,759.00
Each
units
Terminal Keyed 1 NC + 2 NO Solenoid - Plastic - - - - - - Preventa Safety Detection -
RS Stock No. 132-9180
Mfr. Part No.XCSPA491
TWD2,172.00
Each
units
PG 11 Key 2NC/1NO - Yes Polyamide 240V 2NC/1NO 250V Preventa IP67 8 XCSPA -
RS Stock No. 179-4738
Mfr. Part No.HS5D-12ZRNP
BrandIdec
TWD1,076.00
Each
units
PG13.5 Handle 1NO/2NC Interlock - Metal (Head) 250V 1NO+2NC 30V - IP67 - HS5D -
RS Stock No. 179-4739
Mfr. Part No.HS5L-DD44LM-G
BrandIdec
TWD4,261.00
Each
units
M20 Key 1NC/1NC Spring Lock - Metal (Head) 250V 1NC+1NC 30V - IP67 - HS5L -
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. 179-4733
Mfr. Part No.HS5D-12RNM
BrandIdec
TWD992.00
Each
units
M20 Handle 1NO/2NC Interlock - Plastic (Head) 250V 1NO+2NC 30V - IP67 - HS5D -
RS Stock No. 498-915
Mfr. Part No.3SE5112-1QV10
BrandSiemens
TWD4,409.00
Each
units
M20 Key 2NC/1NO - - Metal - - 24V Sirius IP66, IP67 5 3SE5 2NC/1NO
New
RS Stock No. 219-9204
Mfr. Part No.XCSPL551
TWD1,964.00
Each
units
Terminal Keyed 1 NC + 1 NO Solenoid - Plastic - - - - - - Preventa Safety Detection -
RS Stock No. 133-0062
Mfr. Part No.XCSMP70L5
TWD7,654.00
Each
units
Cable Key 2NC/1NO - Yes Polyamide 240V 2NC/1NO 250V Preventa IP67 1 XCSMP -
RS Stock No. 766-1618
Mfr. Part No.XCSB722
TWD6,037.00
Each
units
- Key 2NC/1NO - Yes Zamak 240V 2NC/1NO 250V Preventa IP67 8 XCSB -
RS Stock No. 181-1199
Mfr. Part No.106817 & LS-02-ZB
BrandEaton
TWD3,301.00
Each
units
Cage Clamp - 2NC Spring Lock Yes Insulated Material 415V 2NC 220V - IP65, IP66 1 LS4 ZB -
RS Stock No. 826-3912
Mfr. Part No.203001
BrandIDEM
TWD1,575.00
Each
units
M20 Key 2NC/1NO - - Die Cast Metal 240V 2NC - Kobra IP67 4 KM 1NO
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. 746-7292
Mfr. Part No.D4NS-4AF
BrandOmron
TWD1,293.00
Each
units
Screw Key 1NC/1NO - - Plastic - - - - - 4 D4NS -
RS Stock No. 189-5309
Mfr. Part No.6018200002
TWD4,906.00
Each
units
Screw - NC/NO (Guard Lock), NC/NO (Inter Lock) Guard Lock, Inter Lock Yes Glass Fibre Reinforced Thermoplastic 24V NC/NO (Guard Lock), NC/NO (Inter Lock) 24V - IP67 - SLC -
New
RS Stock No. 213-1658
Mfr. Part No.HS1T-VC44ZSM-G
BrandIdec
TWD10,320.00
Each
units
- - 1NC, 1NO Type 2 - - 250V - - - - - HS1T -
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 -