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. 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. 746-7283
Mfr. Part No.D4NL-4EFA-B
BrandOmron
£154.10
Each
Units
- D4NL - - Power to Unlock - Various Options - M20 88.5mm 95mm 35.5mm 24 V dc -
RS Stock No. 305-1994
Mfr. Part No.XCSTE5341
£204.00
Each
Units
Preventa XCS-TE - - Power to Unlock - - - PG11 93.5mm 33mm 110mm 230 V ac -
RS Stock No. 862-1686
Mfr. Part No.D4SL-N4NFA-D
BrandOmron
£138.80
Each
Units
- D4SL-N - - Power to Unlock No Various Options - M20 39mm 179.5mm 39mm 24 V dc -
RS Stock No. 742-0701
Mfr. Part No.AZM 170-11ZRKA 24 VAC/DC
BrandSchmersal
£168.22
Each
Units
- AZM 170 - - Power to Lock No Various Options - 1/2 NPT 30mm 90mm 84mm 24 V ac/dc -
RS Stock No. 746-7289
Mfr. Part No.D4NL-4CFA-B4
BrandOmron
£154.10
Each
Units
- D4NL - - Power to Unlock - Various Options - M20 88.5mm 95mm 35.5mm 24 V dc -
RS Stock No. 810-4065
Mfr. Part No.440G-LZS21SPLB
£209.00
Each
Units
- 440G-LZ - - Power to Lock Yes Standard - 10 m Cable 140mm 45mm 50mm 24 V dc -
RS Stock No. 123-7512
Mfr. Part No.202021-SS
BrandIDEM
£160.01
Each
Units
SAMLOCK KLM-P2L - - Power to Lock No Various Options - M20 46mm 176mm 47mm 24 V dc -
RS Stock No. 814-7081
Mfr. Part No.XCSE7513
£348.00
Each
Units
Preventa XCS-E - - Power to Unlock Yes Key - 1/2 NPT 146mm 98mm 44mm 24 V ac/dc -
RS Stock No. 826-3993
Mfr. Part No.201001
BrandIDEM
£115.16
Each
Units
SEZYLOCK KLP - - Power to Unlock No Various Options - M20 160mm 46mm 45.5mm 24 V ac/dc -
RS Stock No. 397-2217
Mfr. Part No.XCSE7341
£294.00
Each
Units
Preventa XCS-E - - Power to Unlock Yes Key - PG13.5 98mm 44mm 146mm 230 V ac -
RS Stock No. 862-1709
Mfr. Part No.D4SL-N4EFA-D
BrandOmron
£133.10
Each
Units
- D4SL-N - - Power to Unlock No Various Options - M20 39mm 179.5mm 39mm 24 V dc -
RS Stock No. 861-4657
Mfr. Part No.D4NL-2EFA-B
BrandOmron
£154.10
Each
Units
- D4NL - - Power to Unlock - Various Options - 1/2 NPT 39mm 179.5mm 39mm 24 V dc -
RS Stock No. 814-7040
Mfr. Part No.XCSTE7333
£83.49
Each
Units
Preventa XCS-TE - - Power to Unlock Yes Key - 1/2 NPT 3.67in 4.32in 1.3in 120 V ac -
RS Stock No. 742-0717
Mfr. Part No.AZM 170SK-11/11ZRK-2197 24 VAC/DC
BrandSchmersal
£191.81
Each
Units
- AZM 170 - - Power to Unlock No Various Options - 1/2 NPT 30mm 108mm 100.5mm 24 V ac/dc -
RS Stock No. 826-3965
Mfr. Part No.221307
BrandIDEM
£114.93
Each
Units
LEILOCK KL1-P - - Power to Unlock No Various Options - M20 143mm 63mm 41.5mm 230 V ac -
RS Stock No. 498-987
Mfr. Part No.3SE5312-1SD11
BrandSiemens
£217.43
Each
Units
Sirius 3SE5 - - Power to Unlock - Various Options - M20 54mm 43.8mm 159mm 24 V dc -
RS Stock No. 123-7511
Mfr. Part No.201021
BrandIDEM
£130.97
Each
Units
SEZYLOCK KLP-P2L - - Power to Lock No Various Options - M20 46mm 160mm 45.5mm 24 V dc -
RS Stock No. 826-3975
Mfr. Part No.450001
BrandIDEM
£129.25
Each
Units
RAMZLOCK KLTM - - Power to Unlock No Various Options - M20 155mm 105mm 46.5mm 24 V dc -
RS Stock No. 763-7090
Mfr. Part No.3SE5312-1SG11
BrandSiemens
£277.00
Each
Units
Sirius 3SE5 - - Power to Lock - Various Options - M20 54mm 43.8mm 184.1mm 24 V dc -
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