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. 357-9206
Mfr. Part No.440G-T27129
£179.00
Each
Units
TLS-2-GD2 440G-T - - - Power to Lock - - - M20 126mm 86mm 33mm 230 V ac
RS Stock No. 880-1703
Mfr. Part No.AZM300Z-ST-1P2P
BrandSchmersal
£397.95
Each
Units
- AZM 300 - - - Power to Unlock No Various Options - 1/2 NPT 85mm 100mm 35mm 24 V dc
RS Stock No. 763-6937
Mfr. Part No.3SE5322-0SB21
BrandSiemens
£159.08
Each
Units
Sirius 3SE5 - - - Power to Lock - Various Options - M20 54mm 43.8mm 184.1mm 24 V dc
RS Stock No. 537-7119
Mfr. Part No.440G-MT47016
£157.00
Each
Units
- 440G-MT - - - Power to Unlock - - - M20 40mm 46.75mm 199mm 230 V ac/dc
RS Stock No. 357-9228
Mfr. Part No.440G-T27138
£179.00
Each
Units
TLS-3-GD2 440G-T - - - Power to Unlock No Various Options - M20 126mm 86mm 33mm 110 V ac
RS Stock No. 826-3997
Mfr. Part No.202001-SS
BrandIDEM
£147.21
Each
Units
SAMLOCK KLM - - - Power to Unlock No Various Options - M20 176mm 46mm 47mm 24 V ac/dc
RS Stock No. 820-3771
Mfr. Part No.D4SLN4NDAD
BrandOmron
£152.80
Each
Units
- D4SL-N - - - Power to Unlock No Various Options - M20 39mm 39mm 179.9mm 24 V dc
RS Stock No. 609-6732
Mfr. Part No.XCSE7511
£314.45
Each
Units
Preventa XCS-B - - - Power to Lock Yes Key - PG13.5 98mm 44mm 146mm 24 V ac/dc
RS Stock No. 739-0571
Mfr. Part No.XCSLF2525312
£130.00
Each
Units
Preventa XCS-LF - - - Power to Unlock Yes Key - M20 205mm 51mm 43.5mm 24 V ac/dc
RS Stock No. 362-2596
Mfr. Part No.AZM190-02/10RK-24VDC
BrandSchmersal
£205.89
Each
Units
- AZM 190 - - - Power to Unlock No Various Options - M20 41mm 29.5mm 178mm 24 V dc
RS Stock No. 880-1898
Mfr. Part No.MZM 100 ST2-1P2PWREM-A
BrandSchmersal
£617.67
Each
Units
- MZM 100 - - - Power to Lock No Straight - M12 40mm 179mm 40mm 24 V dc
RS Stock No. 498-983
Mfr. Part No.3SE5322-1SD21
BrandSiemens
£170.13
Each
Units
Sirius 3SE5 - - - Power to Unlock - Various Options - M20 54mm 43.8mm 159mm 24 V dc
RS Stock No. 873-2184
Mfr. Part No.440G-T27241
£280.00
Each
Units
TLS-2-GD2 440G-T - - - Power to Lock Yes Straight - M23 126mm 86mm 39mm 24 V ac/dc
RS Stock No. 862-1674
Mfr. Part No.D4SL-N4QFA-DN
BrandOmron
£144.70
Each
Units
- D4SL-N - - - Power to Unlock No Various Options - M20 39mm 155mm 39mm 24 V dc
RS Stock No. 810-4056
Mfr. Part No.440G-LZS21SPLA
£188.00
Each
Units
- 440G-LZ - - - Power to Lock Yes Standard - 3 m Cable 140mm 45mm 50mm 24 V dc
RS Stock No. 198-655
Mfr. Part No.XCSTE7341
£207.00
Each
Units
Preventa XCS TE - - - Power to Unlock - - - 1/2 in, PG11 94mm 110mm 33mm 230 V ac/dc
RS Stock No. 880-1772
Mfr. Part No.AZM 200SK-T-1P2PW
BrandSchmersal
£339.83
Each
Units
- AZM 200 - - - Power to Unlock No Various Options - 1/2 NPT 40mm 220mm 50mm 24 V dc
RS Stock No. 810-4087
Mfr. Part No.440G-LZS21UPLB
£228.00
Each
Units
- 440G-LZ - - - Power to Lock Yes Unique - 10 m Cable 140mm 45mm 50mm 24 V dc
RS Stock No. 617-5093
Mfr. Part No.AZM190-02/01RK-24VDC
BrandSchmersal
£222.46
Each
Units
- AZM 190 - - - Power to Unlock No Various Options - M20 41mm 29.5mm 178mm 24 V dc
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
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