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. 252-3864
Mfr. Part No.XCSPA591
TWD1,357.00
Each
units
- Key 1NC/1NO Polyamide 240V 250V - Preventa - - 8 XCSPA - 30mm
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
TWD2,565.00
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - Yes - 3 AZ16 1NO 30mm
RS Stock No. 757-9231
Mfr. Part No.D4NS-1BF
BrandOmron
TWD1,251.00
Each
units
Screw Key 2NC Plastic 240V 250V - - - - 4 D4NS - 30mm
RS Stock No. 754-8300
Mfr. Part No.3SE5212-0QV40
BrandSiemens
TWD1,685.00
Each
units
M20 Key 2NC/1NO Metal 230V 230V 2NC Sirius - - 5 3SE5 1NO 33mm
RS Stock No. 666-4944
Mfr. Part No.XCSB702EX
TWD9,893.00
Each
units
Screw Key 2NC/1NO Zamak 240V 250V 2NC/1NO Preventa - - 8 XCSB - 44mm
RS Stock No. 666-4947
Mfr. Part No.XCSA702EX
TWD8,589.00
Each
units
Screw Key 2NC/1NO Zamak 240V 250V 2NC/1NO Preventa - - 8 XCSA - 44mm
RS Stock No. 181-1209
Mfr. Part No.LS-S11-24DFT-ZBZ/X
BrandEaton
TWD9,384.00
Each
units
Screw - NO/NC Insulated Material 415V 220V NO/NC - Yes Spring Lock 1 LS ZBZ/X - 30.8mm
RS Stock No. 179-4720
Mfr. Part No.HS1L-DQ44KMSR-G
BrandIdec
TWD6,047.00
Each
units
G1/2 Key 1NC/1NC (Main), 1NO (Door Monitor), 1NO (Lock Monitor) - 250V 30V 1NC+1NC/1NC+1NC (Main), 1NO (Door Monitor), 1NO (Lock Monitor) - - Spring Lock - HS1L - 129mm
RS Stock No. 181-1214
Mfr. Part No.LS-S11-230AMT-ZBZ/X
BrandEaton
TWD8,996.00
Each
units
Screw - NO/NC Insulated Material 415V 220V NO/NC - Yes Magnet Lock 1 LS ZBZ/X - 30.8mm
RS Stock No. 754-8304
Mfr. Part No.3SE5212-0RV40
BrandSiemens
TWD1,585.00
Each
units
M20 Key 1NC/1NO Metal 230V 230V 1NC Sirius - - 5 3SE5 1NO 33mm
RS Stock No. 296-4669
Mfr. Part No.XCSPA592
TWD1,044.00
Each
units
Screw Key 1NC/1NO Glass Fibre Reinforced PA 240V 250V 1NC/1NO Preventa - - 8 XCSPA - 30mm
RS Stock No. 252-3757
Mfr. Part No.XCSA501
TWD3,193.00
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 185-7260
Mfr. Part No.M-KE-NS3 (A101, B201, C301)
BrandIDEM
TWD15,441.00
Each
units
M6 Screw Key - Die Cast Metal, Stainless Steel - - - - - Interlock - M-KE - 109mm
RS Stock No. 181-1210
Mfr. Part No.LS-S02-230AFT-ZBZ/X
BrandEaton
TWD9,384.00
Each
units
Screw - 2NC Insulated Material 415V 220V 2NC - Yes Spring Lock 1 LS ZBZ/X - 30.8mm
RS Stock No. 179-4721
Mfr. Part No.HS1L-DQ44KMSR-R
BrandIdec
TWD6,803.00
Each
units
G1/2 Key 1NC/1NC (Main), 1NO (Door Monitor), 1NO (Lock Monitor) - 250V 30V 1NC+1NC/1NC+1NC (Main), 1NO (Door Monitor), 1NO (Lock Monitor) - - Spring Lock - HS1L - 129mm
RS Stock No. 397-2166
Mfr. Part No.XCSA801
TWD2,761.00
Each
units
Screw Key 3NC Zamak 240V 250V 3NC Preventa - - 8 XCSA - 44mm
RS Stock No. 179-4745
Mfr. Part No.HS5L-VC44LM-G
BrandIdec
TWD4,393.00
Each
units
M20 Key 1NC/1NO (Lock Monitor), 2NC (Door Monitor) Metal (Head) 250V 30V 1NC/1NO (Lock Monitor), 2NC (Door Monitor) - - Spring Lock - HS5L - 127mm
RS Stock No. 179-4749
Mfr. Part No.HS6B-12B05
BrandIdec
TWD2,082.00
Each
units
Cable - 2NC/1NO - 250V 30V 2NC+1NO - - Interlock - HS6B - 87mm
RS Stock No. 133-0084
Mfr. Part No.XCSA503
TWD3,328.00
Each
units
1/2 in NPT Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa Yes - 8 XCSA - 114mm
RS Stock No. 147-556
Mfr. Part No.GKMB16
BrandHoneywell
TWD2,197.00
Each
units
Cable Key 2NC Glass Filled PET 50V 50V 2NC - - - 2 GKM - 16mm