Safety-Rated Interlock Switches

Safety rated interlock switches are safeguarding measures designed to improve safety in situations where guards or gates are used around hazardous machinery or equipment.

What are safety rated interlock switches used for?

In industrial situations, safety rated interlock switches prevent or permit the use of machinery, depending on safety conditions. They allow current to pass to the machine when it is safe to operate, for example when the machine's guard is closed. And they cut off the power if there's a potential hazard, such as a guard being opened. When a dangerous piece of equipment such as a metalworking machine is in operation, safety rated interlock switch might be used to ensure safety gates remain closed, excluding workers from hazardous areas.

Types of safety rated interlock switches

Safety rated interlock switches vary according to their lock type, maximum current and voltage, as well as their housing material. Guard-locking switches prevent access to machine parts that may still be in motion, even when the power has been cut. Hinge switches will close protective gates and guards in unsafe conditions.


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Omschrijving Prijs Connection Type Lock Style Normal State Configuration Lock Type Actuator Included Housing Material Maximum AC Voltage Safety Contacts Maximum DC Voltage Range IP Rating Number of Head Directions Series Auxiliary Contacts
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Screw Key 2NC - - Glass Fibre Reinforced PA 240V - 250V Preventa IP67 8 XCSPA -
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Cable Key 2NC/2NO - - Stainless Steel 240V 2NC/1NO - Kobra IP67, IP69K 4 K-SS-Ex 1NO
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Screw Key 1NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 240V 2NC/1NO - PSENmech IP65 4 - -
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FabrikantBernstein AG
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Screw Key 1NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 240V 1NC/1NO - - IP65 4 SKI -
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M16 Key 1NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 4 AZ17 1NO
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FabrikantOmron
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M20 Key 3NC - - Plastic 240V 3NC 250V - IP67 4 D4NS -
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225,00 €
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M5 Key - - Yes Stainless Steel - - - Prosafe - 1 440T -
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Screw Key 1NC/2NO - - Glass Fibre Reinforced PA 240V 1NC/2NO 250V Preventa IP67 8 XCSTA -
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M20 Key 2NC/1NO - Yes Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 3 AZ16 1NO
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M20 Key 2NC/1NO Interlock Yes Glass Filled PBT 240V 2NC 24V Trojan 5 IP67 4 440K 1NO
RS-stocknr. 792-3089
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72,50 €
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M20 Key 2NC/1NO - Yes Glass Filled PBT 240V 2NC 24V Trojan 5 IP67 4 440K 1NO
RS-stocknr. 263-3624
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Screw Key 2NC/1NO - - Zamak 240V 2NC/1NO 250V Preventa IP67 8 XCSA -
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M20 Key 2NC/1NO - - Glass Fibre Reinforced Thermoplastic 230V 2NC 24V - IP67 3 AZ16 1NO
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M20 Key 1NC - - Glass Fibre Reinforced Thermoplastic 230V 1NC 24V - IP67 3 AZ15 -