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 Rated stroke Power to Lock / Unlock Actuator Included Actuator Type Interface Conduit Entry Length Width Depth Supply Voltage
RS Stock No. 820-3799
Mfr. Part No.D4SLN4QDGD
BrandOmron
£155.90
Each
Units
- D4SL-N - - - Power to Lock No Various Options - M20 39mm 39mm 179.9mm 24 V dc
RS Stock No. 263-3810
Mfr. Part No.XCSE7532
£198.22
Each
Units
Preventa XCS-E - - - Power to Lock Yes Key - PG13.5 98mm 44mm 146mm 120 V ac
RS Stock No. 880-1707
Mfr. Part No.AZM300Z-ST-1P2P-A
BrandSchmersal
£397.95
Each
Units
- AZM 300 - - - Power to Lock No Various Options - 1/2 NPT 85mm 100mm 35mm 24 V dc
RS Stock No. 880-1719
Mfr. Part No.AZM300Z-I2-ST-1P2PA
BrandSchmersal
£434.67
Each
Units
- AZM 300 - - - Power to Lock No Various Options - 1/2 NPT 85mm 100mm 35mm 24 V dc
RS Stock No. 763-6946
Mfr. Part No.3SE5322-0SD23
BrandSiemens
£160.31
Each
Units
Sirius 3SE5 - - - Power to Lock - Various Options - M20 54mm 43.8mm 184.1mm 230 V ac
RS Stock No. 880-1725
Mfr. Part No.AZM300Z-I2-ST-SD2P
BrandSchmersal
£434.67
Each
Units
- AZM 300 - - - Power to Unlock No Various Options - M12 85mm 100mm 35mm 24 V dc
RS Stock No. 739-0662
Mfr. Part No.XCSLE3737342
£163.00
Each
Units
Preventa XCS-LE - - - Power to Unlock Yes Key - M20 205mm 51mm 43.5mm 230 V ac/dc
RS Stock No. 880-1895
Mfr. Part No.MZM 100 ST2-SD2PRE-A
BrandSchmersal
£463.51
Each
Units
- MZM 100 - - - Power to Lock No Straight - M12 40mm 179mm 40mm 24 V dc
RS Stock No. 739-0656
Mfr. Part No.XCSLE3535312
£151.00
Each
Units
Preventa XCS-LE - - - Power to Unlock Yes Key - 1/2 NPT 205mm 51mm 43.5mm 24 V ac/dc
RS Stock No. 763-6952
Mfr. Part No.3SE5322-0SE23
BrandSiemens
£186.72
Each
Units
Sirius 3SE5 - - - Power to Lock - Various Options - M20 54mm 43.8mm 184.1mm 230 V ac
RS Stock No. 151-2444
Mfr. Part No.442G-MABR-ULM-C04
£856.13
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 151-2446
Mfr. Part No.442G-MABL-ULM-C04
£856.13
Each
Units
- 442G - - - Power to Lock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 180-6094
Mfr. Part No.1077943
BrandSick
£276.23
Each
Units
- MLP1 - - - - Yes - - - 120mm 38.5mm 60mm 28.8 V dc
New
RS Stock No. 206-5773
Mfr. Part No.103013908
£416.79
Each
Units
AZM201 AZM201Z-SK-T-1P2PW 1P-Diagnostic, 2P-Safety - 7.5 +0.5/-2.5mm Power to Unlock - - - - - - - 26.4 V dc
RS Stock No. 151-2400
Mfr. Part No.442G-MABH-R
£279.15
Each
Units
- 442G - - - - - - - - 289.3mm 114mm 113.5mm -
RS Stock No. 151-2466
Mfr. Part No.442G-MABRB-UL-E0JP4679
£1,691.51
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M12 x 2 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 151-2424
Mfr. Part No.442G-MABR-URM-C00
£658.96
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 151-2437
Mfr. Part No.442G-MABR-ULM-C02
£792.83
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 151-2553
Mfr. Part No.440G-LZS21UTRH
£232.45
Each
Units
- 440G-LZ - - - Power to Unlock Yes Unique RFID Coded Bolt - M12 45mm 162.9mm 50mm 24 V dc
RS Stock No. 826-4016
Mfr. Part No.209001-PB
BrandIDEM
£274.60
Each
Units
HYGIELOCK KL4-SS - - - Power to Unlock No Various Options - M20 198mm 48mm 47mm 24 V ac/dc