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. 810-4052
Mfr. Part No.440G-LZS21SPRH
£188.00
Each
Units
- 440G-LZ - - - Power to Unlock Yes Standard Guardlink M12 140mm 45mm 50mm 24 V dc
RS Stock No. 820-3796
Mfr. Part No.D4SLN4QDAD
BrandOmron
£155.90
Each
Units
- D4SL-N - - - Power to Unlock No Various Options - M20 39mm 39mm 179.9mm 24 V dc
RS Stock No. 814-7078
Mfr. Part No.XCSL764F3
£264.14
Each
Units
- XCS-L - - - Power to Unlock Yes Key - 1/2 NPT 7.64in 2.99in 1.73in 110 V ac
RS Stock No. 198-740
Mfr. Part No.XCSE7321
£283.00
Each
Units
Preventa XCS E - - - Power to Unlock Yes Key - PG13.5 146mm 98mm 44mm 48 V ac/dc
RS Stock No. 443-8358
Mfr. Part No.440G-L07253
£459.00
Each
Units
Atlas 5 440G-L - - - Power to Unlock Yes Standard - M20 184mm 80mm 56mm 230 V ac/dc
RS Stock No. 880-1788
Mfr. Part No.AZM 200ST2-T-1P2PW
BrandSchmersal
£479.88
Each
Units
- AZM 200 - - - Power to Unlock No Various Options - M12 40mm 220mm 50mm 24 V dc
RS Stock No. 826-4000
Mfr. Part No.205001
BrandIDEM
£226.41
Each
Units
HYGIELOCK KL3-SS - - - Power to Unlock No Various Options - M20 177mm 48mm 47mm 24 V ac/dc
RS Stock No. 739-0647
Mfr. Part No.XCSLE2727312
£105.00
Each
Units
Preventa XCS-LE - - - Power to Unlock Yes Key - M20 205mm 51mm 43.5mm 24 V ac/dc
RS Stock No. 609-6748
Mfr. Part No.XCSE8311
£285.95
Each
Units
Preventa XCS-E - - - Power to Unlock Yes Key - PG13.5 98mm 44mm 146mm 24 V ac/dc
RS Stock No. 617-5100
Mfr. Part No.AZM 161SK-12/12RKA-110/230
BrandSchmersal
£187.29
Each
Units
- AZM 161 - - - Power to Lock No Various Options - M16 90mm 30mm 130mm 110 V ac, 230 V ac
RS Stock No. 617-5071
Mfr. Part No.AZM 161SK-12/12RK-110/230
BrandSchmersal
£187.29
Each
Units
- AZM 161 - - - Power to Unlock No Various Options - M16 90mm 30mm 130mm 110 V ac, 230 V ac
RS Stock No. 810-4040
Mfr. Part No.440G-LZS21SPRA
£188.00
Each
Units
- 440G-LZ - - - Power to Unlock Yes Standard - 3 m Cable 140mm 45mm 50mm 24 V dc
RS Stock No. 739-0631
Mfr. Part No.XCSLE2525312
£105.00
Each
Units
Preventa XCS-LE - - - Power to Unlock No Key - M20 205mm 51mm 43.5mm 24 V ac/dc
RS Stock No. 862-1696
Mfr. Part No.D4SL-N4AFA
BrandOmron
£129.90
Each
Units
- D4SL-N - - - Power to Unlock No Various Options - M20 39mm 179.5mm 39mm 24 V dc
RS Stock No. 862-1683
Mfr. Part No.D4SL-N4RFA-DN
BrandOmron
£147.62
Each
Units
- D4SL-N - - - Power to Unlock No Various Options - M20 39mm 155mm 39mm 24 V dc
RS Stock No. 820-3780
Mfr. Part No.D4SLN4NDGD
BrandOmron
£155.90
Each
Units
- D4SL-N - - - Power to Lock No Various Options - M20 39mm 39mm 179.9mm 24 V dc
RS Stock No. 763-7047
Mfr. Part No.3SE5312-0SB11
BrandSiemens
£210.67
Each
Units
Sirius 3SE5 - - - Power to Lock - Various Options - M20 54mm 43.8mm 184.1mm 24 V dc
RS Stock No. 810-4059
Mfr. Part No.440G-LZS21SPRB
£209.00
Each
Units
- 440G-LZ - - - Power to Unlock Yes Standard - 10 m Cable 140mm 45mm 50mm 24 V dc
RS Stock No. 880-1851
Mfr. Part No.EX-AZM 161SK-12/12RKA-024-3D
BrandSchmersal
£301.18
Each
Units
- EX-AZM 161 - - - Power to Lock No Various Options - M16 130mm 114mm 30mm 24 V ac/dc
RS Stock No. 814-7084
Mfr. Part No.XCSE8313
£329.00
Each
Units
Preventa XCS-E - - - Power to Unlock Yes Key - 1/2 NPT 146mm 98mm 44mm 24 V ac/dc