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 Conduit Entry Length Width Depth Supply Voltage Maximum AC Voltage Auxiliary Contacts
RS Stock No. 820-3771
Mfr. Part No.D4SLN4NDAD
BrandOmron
$336.29
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 39mm 179.9mm 24 V dc - 2NC/1NO
RS Stock No. 862-1703
Mfr. Part No.D4SL-N4CFG
BrandOmron
$283.71
Each
units
- D4SL-N - - Power to Lock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 742-0701
Mfr. Part No.AZM 170-11ZRKA 24 VAC/DC
BrandSchmersal
$424.50
Each
units
- AZM 170 - - Power to Lock No Various Options 1/2 NPT 30mm 90mm 84mm 24 V ac/dc - 1NO
RS Stock No. 263-3753
Mfr. Part No.XCSE7312
$715.02
Each
units
Preventa XCS-E - - Power to Unlock No Key PG13.5 98mm 44mm 146mm 24 V ac/dc - -
RS Stock No. 492-3008
Mfr. Part No.SS1-CLIN-A02022D024B
BrandFortress
$741.99
Each
units
MGard SS1 - - Power to Unlock Yes Key M12 144.5mm 88.9mm 75.2mm 24 V dc - 2NO
RS Stock No. 763-7047
Mfr. Part No.3SE5312-0SB11
BrandSiemens
$654.45
Each
units
Sirius 3SE5 - - Power to Lock - Various Options M20 54mm 43.8mm 184.1mm 24 V dc - 1NO
RS Stock No. 617-5065
Mfr. Part No.AZM 161SK-12/12RK-024
BrandSchmersal
$403.03
Each
units
- AZM 161 - - Power to Unlock No Various Options M16 90mm 30mm 130mm 24 V ac/dc - 2NO
RS Stock No. 617-5087
Mfr. Part No.AZM 161SK-12/12RKA-024
BrandSchmersal
$481.06
Each
units
- AZM 161 - - Power to Lock No Various Options M16 90mm 30mm 130mm 24 V ac/dc - 2NO
RS Stock No. 397-2223
Mfr. Part No.XCSTE7311
$486.35
Each
units
Preventa XCS-TE - - Power to Unlock - - PG11 93.5mm 33mm 110mm 24 V ac/dc - NC
RS Stock No. 617-5093
Mfr. Part No.AZM190-02/01RK-24VDC
BrandSchmersal
$547.30
Each
units
- AZM 190 - - Power to Unlock No Various Options M20 41mm 29.5mm 178mm 24 V dc - -
RS Stock No. 746-7283
Mfr. Part No.D4NL-4EFA-B
BrandOmron
$313.89
Each
units
- D4NL - - Power to Unlock - Various Options M20 88.5mm 95mm 35.5mm 24 V dc - NC/NO
RS Stock No. 862-1709
Mfr. Part No.D4SL-N4EFA-D
BrandOmron
$282.83
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 744-8654
Mfr. Part No.570001
BrandPilz
$574.13
Each
units
PSENmech PSENme - - Power to Unlock Yes Radius M20 184mm 42.5mm 51mm 24 V ac/dc - -
RS Stock No. 498-993
Mfr. Part No.3SE5312-0SD11
BrandSiemens
$479.73
Each
units
Sirius 3SE5 - - Power to Unlock - Various Options M20 54mm 43.8mm 159mm 24 V dc - 1NO
RS Stock No. 862-1715
Mfr. Part No.D4SL-N4AFG
BrandOmron
$270.04
Each
units
- D4SL-N - - Power to Lock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 741-8679
Mfr. Part No.AZM 170-02ZRK 24 VAC/DC
BrandSchmersal
$449.10
Each
units
- AZM 170 - - Power to Unlock No Various Options 1/2 NPT 30mm 90mm 84mm 24 V ac/dc - -
RS Stock No. 862-1706
Mfr. Part No.D4SL-N4CFA
BrandOmron
$270.20
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 178-3150
Mfr. Part No.8 10 BM 28
BrandMecalectro
$283.30
Each
units
- - - - Power to Unlock No Various Options - 60mm 30mm 30mm 24 V dc - -
RS Stock No. 892-9041
Mfr. Part No.TA2T6SL411
BrandFortress
$902.01
Each
units
AmGardpro proAT / proLok - - Power to Unlock Yes Tongue M12 177.1mm 80mm 40mm 24 V dc - 1NO
RS Stock No. 263-3725
Mfr. Part No.XCSE5312
$596.21
Each
units
Preventa XCS-E - - Power to Unlock Yes Key M20 98mm 44mm 146mm 24 V ac/dc - -
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