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 Range Series Pole Configuration Normal State Configuration Power to Lock / Unlock Actuator Included Rated stroke Supply Voltage Actuator Type Interface Safety Contacts Conduit Entry Length Housing Material
RS Stock No. 179-7564
BrandRS PRO
£21.28
Each
Units
- - - 2NC - - - 600 V ac 90° Key - - PG 13.5 31mm Plastic
RS Stock No. 357-9199
Mfr. Part No.440G-T27127
£172.55
Each
Units
TLS-2-GD2 440G-T - - Power to Lock - - 24 V ac/dc - - 2NC M20 126mm Plastic
RS Stock No. 351-3852
Mfr. Part No.440G-T27121
£177.63
Each
Units
TLS-1-GD2 440G-T - - Power to Unlock - - 24 V ac/dc - - 2NC M20 126mm Plastic
RS Stock No. 251-1956
Mfr. Part No.440G-S36001
£288.86
Each
Units
Spartan 440G-S - - Power to Unlock Yes - 24 V ac/dc Standard - 2NC M20 58mm Plastic
RS Stock No. 397-2223
Mfr. Part No.XCSTE7311
£193.00
Each
Units
Preventa XCS-TE - - Power to Unlock - - 24 V ac/dc - - 2NC PG11 93.5mm Plastic
RS Stock No. 356-6171
Mfr. Part No.440G-L07264
£396.93
Each
Units
Atlas 5 440G-L - - Power to Unlock Yes - 24 V ac/dc Standard - 2NC M20 90mm Metal
RS Stock No. 357-9212
Mfr. Part No.440G-T27134
£197.93
Each
Units
TLS-3-GD2 440G-T - - Power to Unlock - - 24 V ac/dc - - 2NC M20 126mm Plastic
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
£187.29
Each
Units
- AZM 161 - - Power to Unlock No - 24 V ac/dc Various Options - 4NC M16 90mm Plastic
RS Stock No. 536-681
Mfr. Part No.440G-T21BNPM-1B
£322.19
Each
Units
TLS-GD2 440G - - Power to Unlock - - 24 V ac/dc - - 2NC M20 85mm Plastic
RS Stock No. 537-7080
Mfr. Part No.440G-MT47007
£174.58
Each
Units
- 440G-MT - - Power to Unlock - - 24 V ac/dc - - 3NC M20 40mm Metal
RS Stock No. 873-2187
Mfr. Part No.440G-MT47037
£159.36
Each
Units
- 440G-MT - - Power to Unlock Yes - 24 V ac/dc Straight - 3NC M20 199mm Metal
RS Stock No. 744-8651
Mfr. Part No.570000
BrandPilz
£120.66
Each
Units
PSENmech PSENme - - Power to Unlock Yes - 24 V ac/dc Standard - 2NO M20 184mm Plastic
RS Stock No. 792-3118
Mfr. Part No.440G-T27256
£184.73
Each
Units
TLS-2-GD2 440G-T - - Power to Lock Yes - 24 V ac/dc Fully Flexible - 2NC M20 126mm Plastic
RS Stock No. 263-3753
Mfr. Part No.XCSE7312
£300.00
Each
Units
Preventa XCS-E - - Power to Unlock No - 24 V ac/dc Key - 1NO/2NC PG13.5 98mm Metal
RS Stock No. 178-3150
Mfr. Part No.8 10 BM 28
BrandMecalectro
£141.03
Each
Units
- - - - Power to Unlock No - 24 V dc Various Options - - - 60mm -
RS Stock No. 792-3102
Mfr. Part No.440G-T27251
£205.03
Each
Units
TLS-1-GD2 440G-T - - Power to Unlock Yes - 24 V ac/dc Standard - 2NC M20 126mm Plastic
RS Stock No. 397-2188
Mfr. Part No.XCSE7311
£282.15
Each
Units
Preventa XCS-E - - Power to Unlock Yes - 24 V ac/dc Key - 1NO/2NC PG13.5 98mm Metal
RS Stock No. 741-8679
Mfr. Part No.AZM 170-02ZRK 24 VAC/DC
BrandSchmersal
£168.22
Each
Units
- AZM 170 - - Power to Unlock No - 24 V ac/dc Various Options - 2NC 1/2 NPT 30mm Plastic
RS Stock No. 890-2989
Mfr. Part No.440G-TZS21UPRH
£260.58
Each
Units
- 440G-TZ - - Power to Unlock Yes - 24 V dc Straight Guardlink 2 PNP - 92mm Plastic
RS Stock No. 741-8691
Mfr. Part No.AZM 170-11ZRK 24 VAC/DC
BrandSchmersal
£168.22
Each
Units
- AZM 170 - - Power to Unlock No - 24 V ac/dc Various Options - 1NC 1/2 NPT 30mm Plastic