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. 151-2545
Mfr. Part No.440G-LZS21STRB
£135.52
Each
Units
- 440G-LZ - - Power to Unlock Yes - 24 V dc Standard - - - 45mm ABS
RS Stock No. 136-3174
Mfr. Part No.6018119045
£159.26
Each
Units
- SLK DP - Power to Unlock No - 24 V ac/dc Various Options - 1NO/1NC M20 42.5mm Plastic
RS Stock No. 132-9169
Mfr. Part No.XCSTE7512
£226.00
Each
Units
Preventa XCS-TE DP - Power to Unlock Yes - 24 V ac/dc Key - 1NC M16 110mm Plastic
RS Stock No. 151-2463
Mfr. Part No.442G-MABLB-UL-E0P49
£1,598.11
Each
Units
- 442G - - Power to Lock Yes - 5 → 24 V dc Unique RFID Coded Bolt - - M12 x 2 285.3mm Glass Fibre Reinforced Plastic
RS Stock No. 146-5795
Mfr. Part No.AZM161SK-12/12RI-024-B1
BrandSchmersal
£227.15
Each
Units
- AZM 161 3P - Power to Unlock Yes - 24 V ac/dc Coded - 4NC M20 130mm Plastic
RS Stock No. 151-2457
Mfr. Part No.442G-MABLB-UR-P49
£877.25
Each
Units
- 442G - - Power to Lock Yes - 5 → 24 V dc Unique RFID Coded Bolt - - M12 x 2 285.3mm Glass Fibre Reinforced Plastic
RS Stock No. 151-2544
Mfr. Part No.440G-LZS21STRA
£208.58
Each
Units
- 440G-LZ - - Power to Unlock Yes - 24 V dc Standard - - - 45mm ABS
RS Stock No. 151-2462
Mfr. Part No.442G-MABRB-UL-E0P49
£1,598.11
Each
Units
- 442G - - Power to Unlock Yes - 5 → 24 V dc Unique RFID Coded Bolt - - M12 x 2 285.3mm Glass Fibre Reinforced Plastic
RS Stock No. 151-2456
Mfr. Part No.442G-MABRB-UR-P49
£1,504.72
Each
Units
- 442G - - Power to Unlock Yes - 5 → 24 V dc Unique RFID Coded Bolt - - M12 x 2 285.3mm Glass Fibre Reinforced Plastic
RS Stock No. 2509887991
Mfr. Part No.XCSE7342
£303.56
Each
Units
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RS Stock No. 2509896513
Mfr. Part No.XCSE73127
£302.76
Each
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RS Stock No. 2509888152
Mfr. Part No.XCSE8312
£277.58
Each
Units
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RS Stock No. 2508968761
Mfr. Part No.XCSE83127
£305.64
Each
Units
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