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. 792-3105
Mfr. Part No.440G-T27252
£187.00
Each
Units
TLS-1-GD2 440G-T - - Power to Unlock Yes - 24 V ac/dc Fully Flexible - 2NC M20 126mm Plastic
RS Stock No. 617-5087
Mfr. Part No.AZM 161SK-12/12RKA-024
BrandSchmersal
£187.29
Each
Units
- AZM 161 - - Power to Lock No - 24 V ac/dc Various Options - 4NC M16 90mm Plastic
RS Stock No. 537-7096
Mfr. Part No.440G-MT47013
£168.00
Each
Units
- 440G-MT - - Power to Unlock - - 110 V ac/dc - - 3NC M20 40mm Metal
RS Stock No. 357-9177
Mfr. Part No.440G-T27124
£195.00
Each
Units
TLS-1-GD2 440G-T - - Power to Unlock No - 110 V ac Various Options - 2NC M20 126mm Plastic
RS Stock No. 792-3109
Mfr. Part No.440G-T27255
£182.00
Each
Units
TLS-2-GD2 440G-T - - Power to Lock Yes - 24 V ac/dc Standard - 2NC M20 126mm Plastic
RS Stock No. 744-8654
Mfr. Part No.570001
BrandPilz
£154.18
Each
Units
PSENmech PSENme - - Power to Unlock Yes - 24 V ac/dc Radius - 2NO M20 184mm Plastic
RS Stock No. 739-0606
Mfr. Part No.XCSLF3737312
£217.00
Each
Units
Preventa XCS-LF - - Power to Unlock Yes - 24 V ac/dc Key - 2NC/1NO M20 205mm Metal
RS Stock No. 356-6187
Mfr. Part No.440G-L07263
£393.00
Each
Units
Atlas 5 440G-L - - Power to Lock Yes - 110 V ac/dc Standard - 2NC M20 90mm Metal
RS Stock No. 305-1988
Mfr. Part No.XCSTE5311
£196.00
Each
Units
Preventa XCS-TE - - Power to Unlock - - 24 V ac/dc - - 1NO/1NC PG11 93.5mm Plastic
RS Stock No. 862-1703
Mfr. Part No.D4SL-N4CFG
BrandOmron
£129.90
Each
Units
- D4SL-N - - Power to Lock No - 24 V dc Various Options - 2NC M20 39mm Metal
RS Stock No. 824-4920
Mfr. Part No.570800
BrandPilz
£519.22
Each
Units
PSENsgate PSEN sg2c - - - Yes - 24 V dc Handle - 2NC M12 465mm Stainless Steel
RS Stock No. 301-9984
Mfr. Part No.XCSTE7312
£198.00
Each
Units
Preventa XCS-TE - - Power to Unlock - - 24 V ac/dc - - 2NC M16 93.5mm Plastic
RS Stock No. 810-4068
Mfr. Part No.440G-LZS21SPLH
£201.00
Each
Units
- 440G-LZ - - Power to Lock Yes - 24 V dc Standard Guardlink 2 PNP M12 140mm Plastic
RS Stock No. 251-1962
Mfr. Part No.440G-S36003
£292.00
Each
Units
Spartan 440G-S - - Power to Unlock Yes - 110 V ac Standard - 2NC M20 58mm Plastic
RS Stock No. 862-1712
Mfr. Part No.D4SL-N4EFG-D
BrandOmron
£135.80
Each
Units
- D4SL-N - - Power to Lock No - 24 V dc Various Options - 2NC/1NO M20 39mm Metal
RS Stock No. 890-2985
Mfr. Part No.440G-TZS21UPLH
£258.00
Each
Units
- 440G-TZ - - Power to Lock Yes - 24 V dc Straight Guardlink 2 PNP - 92mm Plastic
RS Stock No. 443-8336
Mfr. Part No.440G-L07255
£489.00
Each
Units
Atlas 5 440G-L - - Power to Unlock Yes - 24 V ac/dc Standard - 2NC M20 184mm Metal
RS Stock No. 741-8685
Mfr. Part No.AZM 170-02ZRKA 24 VAC/DC
BrandSchmersal
£168.22
Each
Units
- AZM 170 - - Power to Lock No - 24 V ac/dc Various Options - 2NC 1/2 NPT 30mm Plastic
RS Stock No. 873-2180
Mfr. Part No.440G-MT47038
£183.00
Each
Units
- 440G-MT - - Power to Unlock Yes - 24 V ac/dc Straight - 3NC M20 199mm Metal
RS Stock No. 251-1978
Mfr. Part No.440G-S36005
£292.00
Each
Units
Spartan 440G-S - - Power to Unlock Yes - 230 V ac Standard - 2NC M20 58mm Plastic