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 Actuator Type Interface Conduit Entry Length Width Depth Supply Voltage Maximum AC Voltage
RS Stock No. 179-7564
BrandRS PRO
£20.60
Each
Units
- - - 2NC - - 90° Key - PG 13.5 31mm 31mm 95mm 600 V ac 600V
RS Stock No. 357-9199
Mfr. Part No.440G-T27127
£161.00
Each
Units
TLS-2-GD2 440G-T - - Power to Lock - - - M20 126mm 86mm 33mm 24 V ac/dc -
RS Stock No. 351-3852
Mfr. Part No.440G-T27121
£166.00
Each
Units
TLS-1-GD2 440G-T - - Power to Unlock - - - M20 126mm 86mm 33mm 24 V ac/dc -
RS Stock No. 251-1956
Mfr. Part No.440G-S36001
£259.00
Each
Units
Spartan 440G-S - - Power to Unlock Yes Standard - M20 58mm 35mm 120mm 24 V ac/dc -
RS Stock No. 397-2223
Mfr. Part No.XCSTE7311
£190.00
Each
Units
Preventa XCS-TE - - Power to Unlock - - - PG11 93.5mm 33mm 110mm 24 V ac/dc -
RS Stock No. 356-6171
Mfr. Part No.440G-L07264
£369.00
Each
Units
Atlas 5 440G-L - - Power to Unlock Yes Standard - M20 90mm 56mm 184mm 24 V ac/dc -
RS Stock No. 357-9212
Mfr. Part No.440G-T27134
£184.00
Each
Units
TLS-3-GD2 440G-T - - Power to Unlock - - - M20 126mm 86mm 33mm 24 V ac/dc -
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
£187.29
Each
Units
- AZM 161 - - Power to Unlock No Various Options - M16 90mm 30mm 130mm 24 V ac/dc -
RS Stock No. 536-681
Mfr. Part No.440G-T21BNPM-1B
£302.00
Each
Units
TLS-GD2 440G - - Power to Unlock - - - M20 85mm 41mm 125mm 24 V ac/dc -
RS Stock No. 537-7080
Mfr. Part No.440G-MT47007
£161.00
Each
Units
- 440G-MT - - Power to Unlock - - - M20 40mm 46.75mm 199mm 24 V ac/dc -
RS Stock No. 873-2187
Mfr. Part No.440G-MT47037
£147.00
Each
Units
- 440G-MT - - Power to Unlock Yes Straight - M20 199mm 40mm 46.75mm 24 V ac/dc -
RS Stock No. 492-3008
Mfr. Part No.SS1-CLIN-A02022D024B
BrandFortress
£461.25
Each
Units
mGard SS1 - - Power to Unlock Yes Key - M12 144.5mm 88.9mm 75.2mm 24 V dc -
RS Stock No. 744-8651
Mfr. Part No.570000
BrandPilz
£125.57
Each
Units
PSENmech PSENme - - Power to Unlock Yes Standard - M20 184mm 42.5mm 51mm 24 V ac/dc -
RS Stock No. 892-9041
Mfr. Part No.TA2T6SL411
BrandFortress
£404.87
Each
Units
amGardpro proAT / proLok - - Power to Unlock Yes Tongue - M12 177.1mm 80mm 40mm 24 V dc -
RS Stock No. 792-3118
Mfr. Part No.440G-T27256
£172.00
Each
Units
TLS-2-GD2 440G-T - - Power to Lock Yes Fully Flexible - M20 126mm 86mm 43mm 24 V ac/dc -
RS Stock No. 892-9031
Mfr. Part No.MA2M6SL411
BrandFortress
£415.66
Each
Units
amGardpro proAM / proLok - - Power to Unlock Yes Handle - M12 182.4mm 80mm 40mm 24 V dc -
RS Stock No. 263-3753
Mfr. Part No.XCSE7312
£291.00
Each
Units
Preventa XCS-E - - Power to Unlock No Key - PG13.5 98mm 44mm 146mm 24 V ac/dc -
RS Stock No. 178-3150
Mfr. Part No.8 10 BM 28
BrandMecalectro
£134.90
Each
Units
- - - - Power to Unlock No Various Options - - 60mm 30mm 30mm 24 V dc -
RS Stock No. 792-3102
Mfr. Part No.440G-T27251
£191.00
Each
Units
TLS-1-GD2 440G-T - - Power to Unlock Yes Standard - M20 126mm 86mm 43mm 24 V ac/dc -
RS Stock No. 397-2188
Mfr. Part No.XCSE7311
£280.00
Each
Units
Preventa XCS-E - - Power to Unlock Yes Key - PG13.5 98mm 44mm 146mm 24 V ac/dc -
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