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. 136-3177
Mfr. Part No.6018169054
$382.54
Each
units
- SLK 4P - Power to Unlock No Various Options M20 42.5mm 51mm 184mm 24 V ac/dc 24V 2NC
RS Stock No. 880-1898
Mfr. Part No.MZM 100 ST2-1P2PWREM-A
BrandSchmersal
$1,322.74
Each
units
- MZM 100 - - Power to Lock No Straight M12 40mm 179mm 40mm 24 V dc - 1 PNP
RS Stock No. 880-1729
Mfr. Part No.AZM300Z-I2-ST-SD2P-A
BrandSchmersal
$930.85
Each
units
- AZM 300 - - Power to Lock No Various Options 1/2 NPT 85mm 100mm 35mm 24 V dc - -
RS Stock No. 739-0619
Mfr. Part No.XCSLF3737332
$494.69
Each
units
Preventa XCS-LF - - Power to Unlock Yes Key M20 205mm 51mm 43.5mm 120 V ac/dc - -
RS Stock No. 136-3176
Mfr. Part No.6018119061
$400.33
Each
units
- SLK DP - Power to Unlock No Various Options M20 42.5mm 51mm 184mm 24 V ac/dc 24V NC/NO
RS Stock No. 880-1725
Mfr. Part No.AZM300Z-I2-ST-SD2P
BrandSchmersal
$930.85
Each
units
- AZM 300 - - Power to Unlock No Various Options M12 85mm 100mm 35mm 24 V dc - -
RS Stock No. 814-7053
Mfr. Part No.XCSB803
$130.87
Each
units
Preventa XCS-B - - Power to Lock Yes Key 1/2 NPT 114mm 52mm 44mm 230 V ac/dc - -
RS Stock No. 880-1905
Mfr. Part No.MZM 100 B ST2-SD2PRE-A
BrandSchmersal
$1,298.93
Each
units
- MZM 100 B - - Power to Lock No Straight M12 40mm 179mm 40mm 24 V dc - -
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