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. 151-2415
Mfr. Part No.442G-MABR-UT-C00
£563.49
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M20 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 151-2546
Mfr. Part No.440G-LZS21STRH
£208.58
Each
Units
- 440G-LZ - - - Power to Unlock Yes Standard - M12 45mm 162.9mm 50mm 24 V dc
RS Stock No. 151-2556
Mfr. Part No.440G-LZS21UTLB
£148.23
Each
Units
- 440G-LZ - - - Power to Lock Yes Unique RFID Coded Bolt - - 45mm 162.9mm 50mm 24 V dc
RS Stock No. 136-3177
Mfr. Part No.6018169054
£163.29
Each
Units
- SLK 4P - - Power to Unlock No Various Options - M20 42.5mm 51mm 184mm 24 V ac/dc
RS Stock No. 151-2454
Mfr. Part No.442G-MABL-URM-C05
£668.30
Each
Units
- 442G - - - Power to Lock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 151-2458
Mfr. Part No.442G-MABRB-UR-E0P49
£1,598.11
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M12 x 2 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 146-5798
Mfr. Part No.AZM170-02ZRI-B1 24VAC/DC
BrandSchmersal
£215.22
Each
Units
- AZM 170 DP - - Power to Unlock Yes Coded - M20 90mm 84mm 30mm 24 V ac/dc
New
RS Stock No. 213-0798
Mfr. Part No.3SE5322-0SL21
BrandSiemens
£355.46
Each
Units
SIRIUS 3SE5 - 2NC/1NO - - - - - - - - - 24 V dc
RS Stock No. 151-2434
Mfr. Part No.442G-MABL-ULM-C00
£658.96
Each
Units
- 442G - - - Power to Lock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 151-2422
Mfr. Part No.442G-MABR-UT-C03
£731.60
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M20 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 151-2417
Mfr. Part No.442G-MABR-UT-C01
£669.34
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M20 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 151-2462
Mfr. Part No.442G-MABRB-UL-E0P49
£1,598.11
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. 151-2549
Mfr. Part No.440G-LZS21STLB
£232.45
Each
Units
- 440G-LZ - - - Power to Lock Yes Standard - - 45mm 162.9mm 50mm 24 V dc
RS Stock No. 136-3174
Mfr. Part No.6018119045
£156.91
Each
Units
- SLK DP - - Power to Unlock No Various Options - M20 42.5mm 51mm 184mm 24 V ac/dc
RS Stock No. 146-5795
Mfr. Part No.AZM161SK-12/12RI-024-B1
BrandSchmersal
£227.15
Each
Units
- AZM 161 3P - - Power to Unlock Yes Coded - M20 130mm 90mm 30mm 24 V ac/dc
RS Stock No. 151-2545
Mfr. Part No.440G-LZS21STRB
£135.52
Each
Units
- 440G-LZ - - - Power to Unlock Yes Standard - - 45mm 162.9mm 50mm 24 V dc
RS Stock No. 151-2452
Mfr. Part No.442G-MABR-ULM-C05
£668.30
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 151-2457
Mfr. Part No.442G-MABLB-UR-P49
£877.25
Each
Units
- 442G - - - Power to Lock Yes Unique RFID Coded Bolt - M12 x 2 285.3mm 114mm 113.9mm 5 → 24 V dc
RS Stock No. 151-2461
Mfr. Part No.442G-MABLB-UL-P49
£1,504.72
Each
Units
- 442G - - - Power to Lock Yes Unique RFID Coded Bolt - M12 x 2 285.3mm 114mm 174mm 5 → 24 V dc
RS Stock No. 151-2451
Mfr. Part No.442G-MABR-URM-C05
£668.30
Each
Units
- 442G - - - Power to Unlock Yes Unique RFID Coded Bolt - M23 285.3mm 114mm 113.9mm 5 → 24 V dc