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. 746-7198
Mfr. Part No.D4BL-1CRA
BrandOmron
TWD10,416.00
Each
units
- D4BL - - Power to Unlock - Various Options 1/2 NPT 116.5mm 123.5mm 46.3mm 24 V dc - 1NC
RS Stock No. 757-9190
Mfr. Part No.D4NL-4AFG-B
BrandOmron
TWD5,810.00
Each
units
- D4NL - - Power to Lock - Various Options 1/2 NPT 95mm 88.5mm 35.5mm 24 V dc - NC/NO
RS Stock No. 862-1696
Mfr. Part No.D4SL-N4AFA
BrandOmron
TWD5,592.00
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 757-9203
Mfr. Part No.D4NL-4EFG-B
BrandOmron
TWD5,810.00
Each
units
- D4NL - - Power to Lock - Various Options M20 95mm 88.5mm 35.5mm 24 V dc - 2NC/1NO
RS Stock No. 757-9216
Mfr. Part No.D4NL-1AFG-B
BrandOmron
TWD6,770.00
Each
units
- D4NL - - Power to Lock - Various Options 1/2 NPT 95mm 88.5mm 35.5mm 24 V dc - NC/NO
RS Stock No. 746-7208
Mfr. Part No.D4BL-1CRA-A
BrandOmron
TWD10,416.00
Each
units
- D4BL - - Power to Unlock - Various Options 1/2 NPT 116.5mm 123.5mm 46.3mm 24 V dc - 1NC
RS Stock No. 820-3793
Mfr. Part No.D4SLN4RDAD
BrandOmron
TWD6,711.00
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 39mm 179.9mm 24 V dc - 3NC
RS Stock No. 862-1712
Mfr. Part No.D4SL-N4EFG-D
BrandOmron
TWD5,847.00
Each
units
- D4SL-N - - Power to Lock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 820-3787
Mfr. Part No.D4SLN4PDGD
BrandOmron
TWD6,835.00
Each
units
- D4SL-N - - Power to Lock No Various Options M20 39mm 39mm 179.9mm 24 V dc - 3NC
RS Stock No. 861-4657
Mfr. Part No.D4NL-2EFA-B
BrandOmron
TWD6,770.00
Each
units
- D4NL - - Power to Unlock - Various Options 1/2 NPT 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 862-1703
Mfr. Part No.D4SL-N4CFG
BrandOmron
TWD5,592.00
Each
units
- D4SL-N - - Power to Lock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 820-3796
Mfr. Part No.D4SLN4QDAD
BrandOmron
TWD6,711.00
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 39mm 179.9mm 24 V dc - 2NC/1NO
RS Stock No. 746-7223
Mfr. Part No.D4JL-4NFA-C5
BrandOmron
TWD7,982.00
Each
units
- D4JL - - Power to Unlock - - 1/2 NPT 114mm 132.9mm 36.5mm 24 V dc - 2NC/1NO
RS Stock No. 757-9200
Mfr. Part No.D4NL-4CFG-B
BrandOmron
TWD5,810.00
Each
units
- D4NL - - Power to Lock No Various Options M20 95mm 88.5mm 35.5mm 24 V dc - 2NC
RS Stock No. 822-3860
Mfr. Part No.D4SL-N3NFG-DN
BrandOmron
TWD5,940.00
Each
units
- D4SL-N - - Power to Lock - Various Options 1/2-14 NPT 39mm 155mm 39mm 24 V dc - 2NC/1NO
RS Stock No. 862-1706
Mfr. Part No.D4SL-N4CFA
BrandOmron
TWD5,592.00
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 862-1692
Mfr. Part No.D4SL-N4RFA-D
BrandOmron
TWD6,098.00
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 179.5mm 39mm 24 V dc - 3NC
RS Stock No. 862-1715
Mfr. Part No.D4SL-N4AFG
BrandOmron
TWD5,592.00
Each
units
- D4SL-N - - Power to Lock No Various Options M20 39mm 179.5mm 39mm 24 V dc - NC/NO
RS Stock No. 746-7289
Mfr. Part No.D4NL-4CFA-B4
BrandOmron
TWD6,770.00
Each
units
- D4NL - - Power to Unlock - Various Options M20 88.5mm 95mm 35.5mm 24 V dc - NC/NO
RS Stock No. 820-3783
Mfr. Part No.D4SLN4PDAD
BrandOmron
TWD6,835.00
Each
units
- D4SL-N - - Power to Unlock No Various Options M20 39mm 39mm 179.9mm 24 V dc - 3NC