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. 820-3771
Mfr. Part No.D4SLN4NDAD
BrandOmron
$513.58
Each
units
- D4SL-N - - Power to Unlock No - 24 V dc Various Options 2NC/1NO M20 39mm Metal 39mm
RS Stock No. 862-1703
Mfr. Part No.D4SL-N4CFG
BrandOmron
$299.42
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 2NC M20 39mm Metal 179.5mm
RS Stock No. 742-0701
Mfr. Part No.AZM 170-11ZRKA 24 VAC/DC
BrandSchmersal
$452.67
Each
units
- AZM 170 - - Power to Lock No - 24 V ac/dc Various Options 1NC 1/2 NPT 30mm Plastic 90mm
RS Stock No. 263-3753
Mfr. Part No.XCSE7312
$1,603.17
Each
units
Preventa XCS-E - - Power to Unlock No - 24 V ac/dc Key 1NO/2NC PG13.5 98mm Metal 44mm
RS Stock No. 763-7047
Mfr. Part No.3SE5312-0SB11
BrandSiemens
$702.22
Each
units
Sirius 3SE5 - - Power to Lock - - 24 V dc Various Options 2NC M20 54mm Metal 43.8mm
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
$464.43
Each
units
- AZM 161 - - Power to Unlock No - 24 V ac/dc Various Options 4NC M16 90mm Plastic 30mm
RS Stock No. 617-5087
Mfr. Part No.AZM 161SK-12/12RKA-024
BrandSchmersal
$554.35
Each
units
- AZM 161 - - Power to Lock No - 24 V ac/dc Various Options 4NC M16 90mm Plastic 30mm
RS Stock No. 397-2223
Mfr. Part No.XCSTE7311
$486.67
Each
units
Preventa XCS-TE - - Power to Unlock - - 24 V ac/dc - 2NC PG11 93.5mm Plastic 33mm
RS Stock No. 617-5093
Mfr. Part No.AZM190-02/01RK-24VDC
BrandSchmersal
$583.62
Each
units
- AZM 190 - - Power to Unlock No - 24 V dc Various Options 3NC M20 41mm Plastic 29.5mm
RS Stock No. 862-1709
Mfr. Part No.D4SL-N4EFA-D
BrandOmron
$414.36
Each
units
- D4SL-N - - Power to Unlock No - 24 V dc Various Options 2NC/1NO M20 39mm Metal 179.5mm
RS Stock No. 746-7283
Mfr. Part No.D4NL-4EFA-B
BrandOmron
$362.98
Each
units
- D4NL - - Power to Unlock - - 24 V dc Various Options 2NC/1NO M20 88.5mm Plastic 95mm
RS Stock No. 744-8654
Mfr. Part No.570001
BrandPilz
$605.77
Each
units
PSENmech PSENme - - Power to Unlock Yes - 24 V ac/dc Radius 2NO M20 184mm Plastic 42.5mm
RS Stock No. 862-1715
Mfr. Part No.D4SL-N4AFG
BrandOmron
$297.04
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 1NC/1NO M20 39mm Metal 179.5mm
RS Stock No. 498-993
Mfr. Part No.3SE5312-0SD11
BrandSiemens
$681.76
Each
units
Sirius 3SE5 - - Power to Unlock - - 24 V dc Various Options 2NC M20 54mm Metal 43.8mm
RS Stock No. 741-8679
Mfr. Part No.AZM 170-02ZRK 24 VAC/DC
BrandSchmersal
$517.51
Each
units
- AZM 170 - - Power to Unlock No - 24 V ac/dc Various Options 2NC 1/2 NPT 30mm Plastic 90mm
RS Stock No. 862-1706
Mfr. Part No.D4SL-N4CFA
BrandOmron
$420.28
Each
units
- D4SL-N - - Power to Unlock No - 24 V dc Various Options 2NC M20 39mm Metal 179.5mm
RS Stock No. 178-3150
Mfr. Part No.8 10 BM 28
BrandMecalectro
$277.86
Each
units
- - - - Power to Unlock No - 24 V dc Various Options - - 60mm - 30mm
RS Stock No. 252-3814
Mfr. Part No.XCSE5341
$541.40
Each
units
Preventa XCS-E - - Power to Unlock Yes - 230 V ac Key 2NO/1NC PG13.5 98mm Metal 44mm
RS Stock No. 820-3780
Mfr. Part No.D4SLN4NDGD
BrandOmron
$513.58
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 2NC/1NO M20 39mm Metal 39mm
RS Stock No. 742-0717
Mfr. Part No.AZM 170SK-11/11ZRK-2197 24 VAC/DC
BrandSchmersal
$476.31
Each
units
- AZM 170 - - Power to Unlock No - 24 V ac/dc Various Options 2NC 1/2 NPT 30mm Plastic 108mm