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 Rated stroke Power to Lock / Unlock Actuator Included Actuator Type Interface Conduit Entry Length Width Depth Supply Voltage
RS Stock No. 792-3105
Mfr. Part No.440G-T27252
£176.00
Each
Units
TLS-1-GD2 440G-T - - - Power to Unlock Yes Fully Flexible - M20 126mm 86mm 43mm 24 V ac/dc
RS Stock No. 617-5087
Mfr. Part No.AZM 161SK-12/12RKA-024
BrandSchmersal
£187.29
Each
Units
- AZM 161 - - - Power to Lock No Various Options - M16 90mm 30mm 130mm 24 V ac/dc
RS Stock No. 537-7096
Mfr. Part No.440G-MT47013
£157.00
Each
Units
- 440G-MT - - - Power to Unlock - - - M20 40mm 46.75mm 199mm 110 V ac/dc
RS Stock No. 357-9177
Mfr. Part No.440G-T27124
£184.00
Each
Units
TLS-1-GD2 440G-T - - - Power to Unlock No Various Options - M20 126mm 86mm 33mm 110 V ac
RS Stock No. 792-3109
Mfr. Part No.440G-T27255
£172.00
Each
Units
TLS-2-GD2 440G-T - - - Power to Lock Yes Standard - M20 126mm 86mm 43mm 24 V ac/dc
RS Stock No. 744-8654
Mfr. Part No.570001
BrandPilz
£154.18
Each
Units
PSENmech PSENme - - - Power to Unlock Yes Radius - M20 184mm 42.5mm 51mm 24 V ac/dc
RS Stock No. 739-0606
Mfr. Part No.XCSLF3737312
£217.00
Each
Units
Preventa XCS-LF - - - Power to Unlock Yes Key - M20 205mm 51mm 43.5mm 24 V ac/dc
RS Stock No. 356-6187
Mfr. Part No.440G-L07263
£369.00
Each
Units
Atlas 5 440G-L - - - Power to Lock Yes Standard - M20 90mm 56mm 184mm 110 V ac/dc
RS Stock No. 862-1703
Mfr. Part No.D4SL-N4CFG
BrandOmron
£129.90
Each
Units
- D4SL-N - - - Power to Lock No Various Options - M20 39mm 179.5mm 39mm 24 V dc
RS Stock No. 305-1988
Mfr. Part No.XCSTE5311
£196.00
Each
Units
Preventa XCS-TE - - - Power to Unlock - - - PG11 93.5mm 33mm 110mm 24 V ac/dc
RS Stock No. 824-4920
Mfr. Part No.570800
BrandPilz
£519.22
Each
Units
PSENsgate PSEN sg2c - - - - Yes Handle - M12 465mm 200mm 108mm 24 V dc
RS Stock No. 301-9984
Mfr. Part No.XCSTE7312
£198.00
Each
Units
Preventa XCS-TE - - - Power to Unlock - - - M16 93.5mm 33mm 110mm 24 V ac/dc
RS Stock No. 810-4068
Mfr. Part No.440G-LZS21SPLH
£188.00
Each
Units
- 440G-LZ - - - Power to Lock Yes Standard Guardlink M12 140mm 45mm 50mm 24 V dc
RS Stock No. 251-1962
Mfr. Part No.440G-S36003
£265.00
Each
Units
Spartan 440G-S - - - Power to Unlock Yes Standard - M20 58mm 35mm 120mm 110 V ac
RS Stock No. 862-1712
Mfr. Part No.D4SL-N4EFG-D
BrandOmron
£135.80
Each
Units
- D4SL-N - - - Power to Lock No Various Options - M20 39mm 179.5mm 39mm 24 V dc
RS Stock No. 890-2985
Mfr. Part No.440G-TZS21UPLH
£243.00
Each
Units
- 440G-TZ - - - Power to Lock Yes Straight Guardlink - 92mm 39mm 126mm 24 V dc
RS Stock No. 443-8336
Mfr. Part No.440G-L07255
£459.00
Each
Units
Atlas 5 440G-L - - - Power to Unlock Yes Standard - M20 184mm 80mm 56mm 24 V ac/dc
RS Stock No. 873-2180
Mfr. Part No.440G-MT47038
£172.00
Each
Units
- 440G-MT - - - Power to Unlock Yes Straight - M20 199mm 40mm 46.75mm 24 V ac/dc
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 Various Options - 1/2 NPT 30mm 90mm 84mm 24 V ac/dc
RS Stock No. 251-1978
Mfr. Part No.440G-S36005
£265.00
Each
Units
Spartan 440G-S - - - Power to Unlock Yes Standard - M20 58mm 35mm 120mm 230 V ac