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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M6 Screw Key - Die Cast Metal, Stainless Steel - - - - - Interlock 2 M-TD - 109mm
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M20 Key 1NC/1NO Glass Filled PET 600V 250V 1NC - Yes - 2 GKB 1NO 42.6mm
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Tillv. art.nr6018200020
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M12 - 1NC (Guard Lock), NC/NO (Inter Lock) Glass Fibre Reinforced Thermoplastic 24V 24V NC (Guard Lock), NC/NO (Inter Lock) - Yes Guard Lock, Inter Lock - SLC - 44mm
RS-artikelnummer 861-4650
Tillv. art.nrD4NS-2CF
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G1/2 Key 2NC/1NO Plastic 240V 250V - - Yes - 4 D4NS - 96mm
RS-artikelnummer 185-7256
Tillv. art.nrM-TS (C301)
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M6 Screw Key - Die Cast Metal, Stainless Steel - - - - - Interlock 2 M-TS - 109mm
RS-artikelnummer 179-4745
Tillv. art.nrHS5L-VC44LM-G
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M20 Key 1NC/1NO (Lock Monitor), 2NC (Door Monitor) Metal (Head) 250V 30V 1NC/1NO (Lock Monitor), 2NC (Door Monitor) - - Spring Lock - HS5L - 127mm
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Cable Key 2NC/1NO Polyamide 240V 250V - Preventa Yes - 1 XCSMP - 30mm
RS-artikelnummer 549-619
Tillv. art.nrD4NS-4CF
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M20 Key 2NC/1NO Plastic 240V 250V 2NC/1NO - - - 4 D4NS - 30mm
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Tillv. art.nrAZ15ZVRK-M20
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RS-artikelnummer 189-5312
Tillv. art.nr6018200016
VarumärkeBernstein AG
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Screw - 2NC (Guard Lock), NC/NO (Inter Lock) Glass Fibre Reinforced Thermoplastic 24V 24V 2NC (Guard Lock), NC/NO (Inter Lock) - Yes Guard Lock, Inter Lock - SLC - 44mm
RS-artikelnummer 179-4724
Tillv. art.nrHS1L-R44KMSRM-G
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M20 Key 1NC/1NC (Main), 1NO/1NC (Door Monitor), 2NC (Lock Monitor) - 250V 30V 1NC+1NC (Main), 1NO/1NC (Door Monitor), 2NC (Lock Monitor) - - Spring Lock - HS1L - 129mm
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