Solenoid Interlock Switches

Solenoid interlock switches allow guards or gates to be securely locked while dangerous processes are in operation. They require an internal solenoid to be energised before the guard can be opened and remain locked until all equipment has ceased moving.

What are solenoid interlock switches used for?

Solenoid interlock switches are widely used in machinery where an interruption could cause damage. This kind of switch mechanism is crucial when operating machinery where the hazard continues even after power supply to a device is stopped, for example when using circular saw blades. Solenoid interlock switches are also used where there is regular entry to dangerous areas, such as high temperature or pressurised sites.

How do solenoid interlock switches work?

Solenoid interlock switches are operated by magnetic force and respond when a guard opens. A machine can't start until the switch's guard is closed and locked, and it will hold the guard closed until dangerous processes are complete. Interlock switches use positive opening safety contacts for high reliability and can only be operated with one of the keys provided.


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Description Price Power to Lock / Unlock Supply Voltage Series Actuator Included Range Actuator Type Safety Contacts Conduit Entry Normal State Configuration Auxiliary Contacts Housing Material IP Rating Maximum AC Voltage Depth
RS Stock No. 179-7564
BrandRS PRO
£24.67
Each
Units
- 600 V ac - - - 90° Key - PG13.5 2NC - Plastic IP67 600V 95mm
RS Stock No. 357-9199
Mfr. Part No.440G-T27127
£172.55
Each
Units
Power to Lock 24 V ac/dc 440G-T - TLS-2-GD2 - 2NC M20 - NO Plastic IP67 - 33mm
RS Stock No. 351-3852
Mfr. Part No.440G-T27121
£177.63
Each
Units
Power to Unlock 24 V ac/dc 440G-T - TLS-1-GD2 - 2NC M20 - NO Plastic IP67 - 33mm
RS Stock No. 251-1956
Mfr. Part No.440G-S36001
£288.86
Each
Units
Power to Unlock 24 V ac/dc 440G-S Yes Spartan Standard 2NC M20 - NO Plastic IP67 - 120mm
RS Stock No. 397-2223
Mfr. Part No.XCSTE7311
£200.00
Each
Units
Power to Unlock 24 V ac/dc XCS-TE - Preventa - 2NC PG11 - NC Plastic IP67 - 110mm
RS Stock No. 356-6171
Mfr. Part No.440G-L07264
£396.93
Each
Units
Power to Unlock 24 V ac/dc 440G-L Yes Atlas 5 Standard 2NC M20 - 1NO Metal IP65 - 184mm
RS Stock No. 357-9212
Mfr. Part No.440G-T27134
£197.93
Each
Units
Power to Unlock 24 V ac/dc 440G-T - TLS-3-GD2 - 2NC M20 - NO Plastic IP66, IP67, IP69K - 33mm
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
£187.29
Each
Units
Power to Unlock 24 V ac/dc AZM 161 No - Various Options 4NC M16 - 2NO Plastic IP67 - 130mm
RS Stock No. 536-681
Mfr. Part No.440G-T21BNPM-1B
£322.19
Each
Units
Power to Unlock 24 V ac/dc 440G - TLS-GD2 - 2NC M20 - NO Plastic IP66, IP67, IP69K - 125mm
RS Stock No. 537-7080
Mfr. Part No.440G-MT47007
£174.58
Each
Units
Power to Unlock 24 V ac/dc 440G-MT - - - 3NC M20 - NO Metal IP67 - 199mm
RS Stock No. 873-2187
Mfr. Part No.440G-MT47037
£159.36
Each
Units
Power to Unlock 24 V ac/dc 440G-MT Yes - Straight 3NC M20 - 1NO Metal IP67 - 46.75mm
RS Stock No. 744-8651
Mfr. Part No.570000
BrandPilz
£120.66
Each
Units
Power to Unlock 24 V ac/dc PSENme Yes PSENmech Standard 2NO M20 - - Plastic IP67 - 51mm
RS Stock No. 792-3118
Mfr. Part No.440G-T27256
£184.73
Each
Units
Power to Lock 24 V ac/dc 440G-T Yes TLS-2-GD2 Fully Flexible 2NC M20 - 1NO Plastic IP66, IP67, IP69K - 43mm
RS Stock No. 263-3753
Mfr. Part No.XCSE7312
£310.00
Each
Units
Power to Unlock 24 V ac/dc XCS-E No Preventa Key 1NO/2NC PG13.5 - - Metal IP67 - 146mm
RS Stock No. 178-3150
Mfr. Part No.8 10 BM 28
BrandMecalectro
£141.03
Each
Units
Power to Unlock 24 V dc - No - Various Options - - - - - IP40 - 30mm
RS Stock No. 792-3102
Mfr. Part No.440G-T27251
£205.03
Each
Units
Power to Unlock 24 V ac/dc 440G-T Yes TLS-1-GD2 Standard 2NC M20 - 1NO Plastic IP66, IP67, IP69K - 43mm
RS Stock No. 397-2188
Mfr. Part No.XCSE7311
£308.00
Each
Units
Power to Unlock 24 V ac/dc XCS-E Yes Preventa Key 1NO/2NC PG13.5 - - Metal IP67 - 146mm
RS Stock No. 741-8679
Mfr. Part No.AZM 170-02ZRK 24 VAC/DC
BrandSchmersal
£168.22
Each
Units
Power to Unlock 24 V ac/dc AZM 170 No - Various Options 2NC 1/2 NPT - - Plastic IP67 - 84mm
RS Stock No. 890-2989
Mfr. Part No.440G-TZS21UPRH
£260.58
Each
Units
Power to Unlock 24 V dc 440G-TZ Yes TLS-ZR GD2 Straight 2 PNP M12 - 1 PNP Plastic IP66, IP69K - 126mm
RS Stock No. 741-8691
Mfr. Part No.AZM 170-11ZRK 24 VAC/DC
BrandSchmersal
£168.22
Each
Units
Power to Unlock 24 V ac/dc AZM 170 No - Various Options 1NC 1/2 NPT - 1NO Plastic IP67 - 84mm