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. 820-3803
Mfr. Part No.D4SLN4RDGD
BrandOmron
HK$1,851.13
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 3NC M20 39mm Metal 39mm
RS Stock No. 746-7286
Mfr. Part No.D4NL-4CFA-B
BrandOmron
HK$1,974.60
Each
units
- D4NL - - Power to Unlock - - 24 V dc Various Options 2NC M20 88.5mm Plastic 95mm
New
RS Stock No. 206-5774
Mfr. Part No.103013909
HK$5,850.10
Each
units
AZM201 AZM201Z-ST2-T-1P2PW 1P-Diagnostic, 2P-Safety - Power to Unlock - 7.5 +0.5/-2.5mm 26.4 V dc - - - - - -
New
RS Stock No. 214-6738
Mfr. Part No.D4SL-N4VFA
BrandOmron
HK$1,589.02
Each
units
- D4SL - 2NC + 2NC Power to Unlock - - 24 V dc - - - - - -
RS Stock No. 862-1706
Mfr. Part No.D4SL-N4CFA
BrandOmron
HK$1,480.26
Each
units
- D4SL-N - - Power to Unlock No - 24 V dc Various Options 2NC M20 39mm Metal 179.5mm
RS Stock No. 746-7201
Mfr. Part No.D4BL-2CRA
BrandOmron
HK$2,889.37
Each
units
- D4BL - - Power to Unlock - - 24 V dc Various Options 1NC/1NO 1/2 NPT 116.5mm Metal 123.5mm
RS Stock No. 820-3796
Mfr. Part No.D4SLN4QDAD
BrandOmron
HK$1,851.13
Each
units
- D4SL-N - - Power to Unlock No - 24 V dc Various Options 3NC M20 39mm Metal 39mm
RS Stock No. 862-1674
Mfr. Part No.D4SL-N4QFA-DN
BrandOmron
HK$1,753.01
Each
units
- D4SL-N - - Power to Unlock No - 24 V dc Various Options 3NC M20 39mm Metal 155mm
RS Stock No. 498-983
Mfr. Part No.3SE5322-1SD21
BrandSiemens
HK$1,955.53
Each
units
Sirius 3SE5 - - Power to Unlock - - 24 V dc Various Options 2NC M20 54mm Plastic 43.8mm
RS Stock No. 498-993
Mfr. Part No.3SE5312-0SD11
BrandSiemens
HK$3,457.29
Each
units
Sirius 3SE5 - - Power to Unlock - - 24 V dc Various Options 2NC M20 54mm Metal 43.8mm
RS Stock No. 763-7139
Mfr. Part No.3SE5312-0SB13
BrandSiemens
HK$3,561.11
Each
units
Sirius 3SE5 - - Power to Lock - - 230 V ac Various Options 2NC M20 54mm Metal 43.8mm
RS Stock No. 123-7513
Mfr. Part No.205021
BrandIDEM
HK$2,876.65
Each
units
HYGIELOCK KL3-SS-P2L - - Power to Lock No - 24 V dc Various Options 2NC M20 48mm 316 Stainless Steel 177mm
RS Stock No. 133-0066
Mfr. Part No.XCSLF3737512
HK$2,203.96
Each
units
Preventa XCS-LF 3P - Power to Lock Yes - 24 V ac/dc Key 1NO/2NC M20 44mm Zamak 51mm
RS Stock No. 820-3780
Mfr. Part No.D4SLN4NDGD
BrandOmron
HK$1,776.78
Each
units
- D4SL-N - - Power to Lock No - 24 V dc Various Options 2NC/1NO M20 39mm Metal 39mm
New
RS Stock No. 214-6718
Mfr. Part No.D4BL-2DRG
BrandOmron
HK$4,257.97
Each
units
- D4BL - 2NC + 1NC Power to Lock - - 24 V dc - - - - - -
RS Stock No. 746-7289
Mfr. Part No.D4NL-4CFA-B4
BrandOmron
HK$1,791.89
Each
units
- D4NL - - Power to Unlock - - 24 V dc Various Options 2NC M20 88.5mm Plastic 95mm
RS Stock No. 146-5799
Mfr. Part No.AZM170-11ZRIA-B1 24VAC/DC
BrandSchmersal
HK$2,607.34
Each
units
- AZM 170 DP - Power to Lock Yes - 24 V ac/dc Coded 1NO M20 90mm Plastic 84mm
RS Stock No. 263-3810
Mfr. Part No.XCSE7532
HK$10,528.96
Each
units
Preventa XCS-E - - Power to Lock Yes - 120 V ac Key 1NO/1NC PG13.5 98mm Metal 44mm
RS Stock No. 146-5795
Mfr. Part No.AZM161SK-12/12RI-024-B1
BrandSchmersal
HK$2,751.87
Each
units
- AZM 161 3P - Power to Unlock Yes - 24 V ac/dc Coded 4NC M20 130mm Plastic 90mm
RS Stock No. 814-7087
Mfr. Part No.XCSL761B3
HK$7,258.13
Each
units
- XCS-L - - Power to Unlock Yes - 24 V dc Key 1NO/2NC 1/2 NPT 7.64in Metal 2.99in