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 Safety Contacts Conduit Entry Length Housing Material Width
RS Stock No. 861-4638
Mfr. Part No.D4BL-1DRA
BrandOmron
TWD12,051.00
Each
units
- D4BL - - Power to Unlock - - 24 V dc Various Options 2NC 1/2 NPT 116.5mm Metal 123.5mm
New
RS Stock No. 214-6734
Mfr. Part No.D4NL-2AFA-B4
BrandOmron
TWD6,942.00
Each
units
- D4NL - 1NC/1NO + 1NC/1NO Power to Unlock - - 24 V dc - - - - - -
RS Stock No. 814-7062
Mfr. Part No.XCSE5313
TWD19,595.00
Each
units
Preventa XCS-E - - Power to Unlock Yes - 24 V ac/dc Key 2NO/1NC M20 146mm Metal 98mm
RS Stock No. 826-3962
Mfr. Part No.221304
BrandIDEM
TWD5,177.00
Each
units
LEILOCK KL1-P - - Power to Unlock No - 110 V ac Various Options 2NC M20 143mm Plastic 63mm
RS Stock No. 880-1719
Mfr. Part No.AZM300Z-I2-ST-1P2PA
BrandSchmersal
TWD19,581.00
Each
units
- AZM 300 - - Power to Lock No - 24 V dc Various Options 2 PNP 1/2 NPT 85mm Plastic 100mm
RS Stock No. 136-3177
Mfr. Part No.6018169054
TWD8,350.00
Each
units
- SLK 4P - Power to Unlock No - 24 V ac/dc Various Options 2NC M20 42.5mm Plastic 51mm
RS Stock No. 822-3860
Mfr. Part No.D4SL-N3NFG-DN
BrandOmron
TWD5,940.00
Each
units
- D4SL-N - - Power to Lock - - 24 V dc Various Options 2NC/1NO 1/2-14 NPT 39mm Metal 155mm
RS Stock No. 178-3144
Mfr. Part No.8 10 BJ 28
BrandMecalectro
TWD6,699.00
Each
units
- - - - Power to Lock No - 24 V dc Various Options - - 65mm - 30mm
RS Stock No. 820-3799
Mfr. Part No.D4SLN4QDGD
BrandOmron
TWD6,883.00
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 3NC M20 39mm Metal 39mm
RS Stock No. 252-3814
Mfr. Part No.XCSE5341
TWD12,775.00
Each
units
Preventa XCS-E - - Power to Unlock Yes - 230 V ac Key 2NO/1NC PG13.5 98mm Metal 44mm
RS Stock No. 617-5122
Mfr. Part No.AZM415-11/11 ZPKE 24VAC/DC-M20
BrandSchmersal
TWD15,377.00
Each
units
- AZM 415 - - Power to Unlock No - 24 V ac/dc Various Options 2NC 1/2 NPT 100mm Metal 46.5mm
RS Stock No. 880-1703
Mfr. Part No.AZM300Z-ST-1P2P
BrandSchmersal
TWD17,927.00
Each
units
- AZM 300 - - Power to Unlock No - 24 V dc Various Options 2 PNP 1/2 NPT 85mm Plastic 100mm
RS Stock No. 498-987
Mfr. Part No.3SE5312-1SD11
BrandSiemens
TWD14,188.00
Each
units
Sirius 3SE5 - - Power to Unlock - - 24 V dc Various Options 2NC M20 54mm Metal 43.8mm
RS Stock No. 824-4920
Mfr. Part No.570800
BrandPilz
TWD23,833.00
Each
units
PSENsgate PSEN sg2c - - - Yes - 24 V dc Handle 2NC M12 465mm Stainless Steel 200mm
RS Stock No. 263-3731
Mfr. Part No.XCSE5332
TWD14,337.00
Each
units
Preventa XCS-E - - Power to Unlock Yes - 110/120 V ac Key 1NO/1NC M20 98mm Metal 44mm
RS Stock No. 862-1703
Mfr. Part No.D4SL-N4CFG
BrandOmron
TWD9,425.00
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 2NC M20 39mm Metal 179.5mm
RS Stock No. 744-8651
Mfr. Part No.570000
BrandPilz
TWD6,575.00
Each
units
PSENmech PSENme - - Power to Unlock Yes - 24 V ac/dc Standard 2NO M20 184mm Plastic 42.5mm
RS Stock No. 763-7038
Mfr. Part No.3SE5312-1SB11
BrandSiemens
TWD14,548.00
Each
units
Sirius 3SE5 - - Power to Lock - - 24 V dc Various Options 2NC M20 54mm Metal 43.8mm
RS Stock No. 880-1775
Mfr. Part No.AZM 200SK-T-1P2PWA
BrandSchmersal
TWD15,309.00
Each
units
- AZM 200 - - Power to Lock No - 24 V dc Various Options 2 PNP M12 40mm Plastic 220mm
RS Stock No. 617-5138
Mfr. Part No.AZM415-11/11 ZPKE 230VAC-M20
BrandSchmersal
TWD15,377.00
Each
units
- AZM 415 - - Power to Unlock No - 230 V ac Various Options 2NC 1/2 NPT 100mm Metal 46.5mm