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 Power to Lock / Unlock Series Supply Voltage Actuator Included Range Actuator Type Safety Contacts Conduit Entry Normal State Configuration Auxiliary Contacts Length Housing Material Rated stroke Width
RS Stock No. 179-7564
BrandRS PRO
SGD44.24
Each
units
- - 600 V ac - - 90° Key - PG13.5 2NC - 31mm Plastic - 31mm
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
SGD465.71
Each
units
Power to Unlock AZM 161 24 V ac/dc No - Various Options 4NC M16 - 2NO 90mm Plastic - 30mm
RS Stock No. 862-1712
Mfr. Part No.D4SL-N4EFG-D
BrandOmron
SGD291.41
Each
units
Power to Lock D4SL-N 24 V dc No - Various Options 2NC/1NO M20 - NC/NO 39mm Metal - 179.5mm
RS Stock No. 757-9231
Mfr. Part No.D4NS-1BF
BrandOmron
SGD104.92
Each
units
- D4NS - - - - - - 2NC - 96mm Plastic - 31mm
RS Stock No. 741-8685
Mfr. Part No.AZM 170-02ZRKA 24 VAC/DC
BrandSchmersal
SGD351.97
Each
units
Power to Lock AZM 170 24 V ac/dc No - Various Options 2NC 1/2 NPT - - 30mm Plastic - 90mm
RS Stock No. 178-3144
Mfr. Part No.8 10 BJ 28
BrandMecalectro
SGD310.35
Each
units
Power to Lock - 24 V dc No - Various Options - - - - 65mm - - 30mm
RS Stock No. 617-5087
Mfr. Part No.AZM 161SK-12/12RKA-024
BrandSchmersal
SGD389.20
Each
units
Power to Lock AZM 161 24 V ac/dc No - Various Options 4NC M16 - 2NO 90mm Plastic - 30mm
RS Stock No. 549-619
Mfr. Part No.D4NS-4CF
BrandOmron
SGD109.66
Each
units
- D4NS - - - - 2NC/1NO - 2NC/1NO - 96mm Plastic - 31mm
RS Stock No. 617-5122
Mfr. Part No.AZM415-11/11 ZPKE 24VAC/DC-M20
BrandSchmersal
SGD732.49
Each
units
Power to Unlock AZM 415 24 V ac/dc No - Various Options 2NC 1/2 NPT - 2NO 100mm Metal - 46.5mm
RS Stock No. 742-0726
Mfr. Part No.AZM 170SK-11/02ZRK-2197 24VAC/DC
BrandSchmersal
SGD472.63
Each
units
Power to Unlock AZM 170 24 V ac/dc No - Various Options 3NC 1/2 NPT - 1NO 30mm Plastic - 108mm
RS Stock No. 744-8651
Mfr. Part No.570000
BrandPilz
SGD297.55
Each
units
Power to Unlock PSENme 24 V ac/dc Yes PSENmech Standard 2NO M20 - - 184mm Plastic - 42.5mm
RS Stock No. 757-9207
Mfr. Part No.D4NL-1CFG-B
BrandOmron
SGD337.33
Each
units
Power to Lock D4NL 24 V dc No - Various Options 1NC/1NO 1/2 NPT 2NC + 1NC/1NO 2NC 95mm Plastic - 88.5mm
RS Stock No. 549-552
Mfr. Part No.D4NS-4DF
BrandOmron
SGD86.57
Each
units
- D4NS - - - - 3NC - 3NC - 96mm Plastic - 31mm
RS Stock No. 549-574
Mfr. Part No.D4NS-9AF
BrandOmron
SGD155.64
Each
units
- D4NS - - - - 1NC/1NO - 1NC/1NO - 96mm Plastic - 31mm
RS Stock No. 880-1707
Mfr. Part No.AZM300Z-ST-1P2P-A
BrandSchmersal
SGD854.14
Each
units
Power to Lock AZM 300 24 V dc No - Various Options 2 PNP 1/2 NPT - 1 PNP 85mm Plastic - 100mm
RS Stock No. 880-1779
Mfr. Part No.AZM 200ST2-T-1P2P
BrandSchmersal
SGD879.04
Each
units
Power to Unlock AZM 200 24 V dc No - Various Options 2 PNP M12 - 1 PNP 40mm Plastic - 220mm
RS Stock No. 862-1715
Mfr. Part No.D4SL-N4AFG
BrandOmron
SGD278.75
Each
units
Power to Lock D4SL-N 24 V dc No - Various Options 1NC/1NO M20 - NC/NO 39mm Metal - 179.5mm
RS Stock No. 880-1842
Mfr. Part No.EX-AZM 161SK-12/12RK-024-3D
BrandSchmersal
SGD646.29
Each
units
Power to Unlock EX-AZM 161 24 V ac/dc No - Various Options 2NC/2NO M16 - NC/NO 130mm Plastic - 114mm
RS Stock No. 746-7223
Mfr. Part No.D4JL-4NFA-C5
BrandOmron
SGD426.38
Each
units
Power to Unlock D4JL 24 V dc - - - 2NC/1NO 1/2 NPT - 2NC/1NO 114mm Plastic - 132.9mm
RS Stock No. 617-5100
Mfr. Part No.AZM 161SK-12/12RKA-110/230
BrandSchmersal
SGD401.90
Each
units
Power to Lock AZM 161 110 V ac, 230 V ac No - Various Options 4NC M16 - 2NO 90mm Plastic - 30mm