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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Beskrivning Pris Connection Type Lock Style Normal State Configuration Housing Material Maximum AC Voltage Maximum DC Voltage Safety Contacts Range Actuator Included Lock Type Number of Head Directions Series Auxiliary Contacts Depth
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RS-artikelnummer 189-5301
Tillv. art.nr6018200008
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Screw - NC/NO (Inter Lock), 2NC (Guard Lock) Glass Fibre Reinforced Thermoplastic 24V 24V NC/NO (Inter Lock), 2NC (Guard Lock) - Yes Guard Lock, Inter Lock - SLC - 44mm
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Screw - NO/NC Insulated Material 415V 220V NO/NC - Yes Magnet Lock 1 LS ZBZ/X - 30.8mm
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- - - - - - - - - - - BF - -
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M20 Key 2NC/1NO Stainless Steel 240V - 2NC Kobra - - 4 K-SS 1NO 37.5mm
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M12 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 4 440K 1NO 52mm
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RS-artikelnummer 179-4732
Tillv. art.nrHS5D-12RN
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G1/2 Handle 1NO/2NC Plastic (Head) 250V 30V 1NO+2NC - - Interlock - HS5D - 91mm
RS-artikelnummer 189-5313
Tillv. art.nr6018200017
VarumärkeBernstein AG
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RS-artikelnummer 183-6016
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RS-artikelnummer 179-4737
Tillv. art.nrHS5D-12ZRNM
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Tillv. art.nrHS1L-DT44KMSR-G
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G1/2 Key 1NC (Door Monitor), 1NC (Lock Monitor), 1NC/1NC (Main) - 250V 30V 1NC (Door Monitor), 1NC (Lock Monitor), 1NC+1NC/1NC+1NC (Main) - - Spring Lock - HS1L - 129mm
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Cable - 2NC/1NO - 250V 30V 2NC+1NO - - Interlock - HS6B - 87mm
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