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
$54.49
Each
units
- - 600 V ac - - 90° Key - PG13.5 2NC - 31mm Plastic - 31mm
RS Stock No. 763-7075
Mfr. Part No.3SE5312-0SG11
BrandSiemens
$932.71
Each
units
Power to Lock 3SE5 24 V dc - Sirius Various Options 2NC M20 - 1NO 54mm Metal - 43.8mm
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
$516.58
Each
units
Power to Unlock AZM 161 24 V ac/dc No - Various Options 4NC M16 - 2NO 90mm Plastic - 30mm
RS Stock No. 549-552
Mfr. Part No.D4NS-4DF
BrandOmron
$110.92
Each
units
- D4NS - - - - 3NC - 3NC - 96mm Plastic - 31mm
RS Stock No. 617-5087
Mfr. Part No.AZM 161SK-12/12RKA-024
BrandSchmersal
$616.59
Each
units
Power to Lock AZM 161 24 V ac/dc No - Various Options 4NC M16 - 2NO 90mm Plastic - 30mm
RS Stock No. 820-3771
Mfr. Part No.D4SLN4NDAD
BrandOmron
$570.07
Each
units
Power to Unlock D4SL-N 24 V dc No - Various Options 2NC/1NO M20 - 2NC/1NO 39mm Metal - 39mm
RS Stock No. 880-1851
Mfr. Part No.EX-AZM 161SK-12/12RKA-024-3D
BrandSchmersal
$733.91
Each
units
Power to Lock EX-AZM 161 24 V ac/dc No - Various Options 2NC/2NO M16 - NC/NO 130mm Plastic - 114mm
RS Stock No. 741-8685
Mfr. Part No.AZM 170-02ZRKA 24 VAC/DC
BrandSchmersal
$337.21
Each
units
Power to Lock AZM 170 24 V ac/dc No - Various Options 2NC 1/2 NPT - - 30mm Plastic - 90mm
RS Stock No. 862-1686
Mfr. Part No.D4SL-N4NFA-D
BrandOmron
$341.03
Each
units
Power to Unlock D4SL-N 24 V dc No - Various Options 2NC/1NO M20 - 2NC/1NO 39mm Metal - 179.5mm
RS Stock No. 498-971
Mfr. Part No.3SE5312-1SJ11
BrandSiemens
$1,060.18
Each
units
Power to Unlock 3SE5 24 V dc - Sirius Various Options 2NC M20 - 1NO 54mm Metal - 43.8mm
RS Stock No. 757-9200
Mfr. Part No.D4NL-4CFG-B
BrandOmron
$396.34
Each
units
Power to Lock D4NL 24 V dc No - Various Options 1NC/1NO M20 - 2NC 95mm Plastic - 88.5mm
RS Stock No. 549-619
Mfr. Part No.D4NS-4CF
BrandOmron
$210.20
Each
units
- D4NS - - - - 2NC/1NO - 2NC/1NO - 96mm Plastic - 31mm
RS Stock No. 397-2223
Mfr. Part No.XCSTE7311
$541.32
Each
units
Power to Unlock XCS-TE 24 V ac/dc - Preventa - 2NC PG11 - NC 93.5mm Plastic - 33mm
RS Stock No. 301-9962
Mfr. Part No.XCSTE5312
$562.51
Each
units
Power to Unlock XCS-TE 24 V ac/dc - Preventa - 1NO/1NC M16 - NC 93.5mm Plastic - 33mm
RS Stock No. 862-1715
Mfr. Part No.D4SL-N4AFG
BrandOmron
$319.02
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. 263-3753
Mfr. Part No.XCSE7312
$1,779.52
Each
units
Power to Unlock XCS-E 24 V ac/dc No Preventa Key 1NO/2NC PG13.5 - - 98mm Metal - 44mm
RS Stock No. 826-3953
Mfr. Part No.221301
BrandIDEM
$281.50
Each
units
Power to Unlock KL1-P 24 V ac/dc No LEILOCK Various Options 2NC M20 - 1NO 143mm Plastic - 63mm
RS Stock No. 746-7283
Mfr. Part No.D4NL-4EFA-B
BrandOmron
$389.84
Each
units
Power to Unlock D4NL 24 V dc - D4NL Various Options 2NC/1NO M20 2NC/1NO + 1NC/1NO NC/NO 88.5mm Plastic - 95mm
RS Stock No. 757-9207
Mfr. Part No.D4NL-1CFG-B
BrandOmron
$365.41
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. 741-8679
Mfr. Part No.AZM 170-02ZRK 24 VAC/DC
BrandSchmersal
$575.61
Each
units
Power to Unlock AZM 170 24 V ac/dc No - Various Options 2NC 1/2 NPT - - 30mm Plastic - 90mm