Limit Switches

Limit switches are a contact proximity sensor device that consists of an actuator mechanically linked to a set of output contacts. When an object comes into contact with the actuator, the device operates the contacts to make or break an electrical connection.

Limit Switch Makeup

Limit switches are made up of three key components:
•Actuator Head - The actuator is the part of the switch that makes physical contact with the object. In some limit switches, the actuator is attached to an operating head which translates a rotary, linear, or perpendicular motion to open or close the electrical contacts of the switch.


•Switch Body – The switch body is the component containing the electrical contact mechanism, the contacts within the body open or close the electrical circuit when the actuator is activated.


•Receptacle/Terminals - The component containing the terminal screws or screw/clamp assembly necessary for wiring purposes.



Actuator Types

Limit switches are available with a wide range of actuator types. The type of actuator used can be determined by the mounting position, force required and objects to be detected.
•Rotary Lever - with lever actuators, a cam or plate hits the end of the lever arm which in turn rotates a shaft and operates the contacts in the switch. The rotation may be spring returned (momentary) or maintained.


•Plunger - Plunger types are best where short controlled machine movements are present or where mounting space does not permit a lever type.


•Cat Whisker or Coil Spring – Longer actuators with a coil wire that can be moved/bent in multiple directions. Typically used in conveying applications to count objects as they pass by.


•Forked – Used with maintained contacts, consisting of two roller levers. One roller will trip the switch and when the second is moved to the opposite direction it will reset the switch.

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Omschrijving Prijs Actuator Type Pole and Throw Configuration Normal State Configuration IP Rating Maximum Current Housing Material Maximum AC Voltage Maximum DC Voltage Connection Type Contact Type Series Terminal Type Length Width
RS-stocknr. 822-5658
FabrikantnummerZE-Q22-2S
FabrikantOmron
73,24 €
Each
Aantal stuks
Roller Plunger SPDT NO/NC IP65 15 A @ 480 V ac, 500 mA @ 125 V dc - 480V 250V 1/2 in 14 NPSM - - Conduit 86mm 44.5mm
RS-stocknr. 436-0182
FabrikantnummerZ-15GQ21-B
FabrikantOmron
21,57 €
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Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 58.9mm 49.2mm
RS-stocknr. 749-7631
Fabrikantnummer3SE5122-0CE01
FabrikantSiemens
48,96 €
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Roller Lever DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 56mm
RS-stocknr. 186-8425
FabrikantnummerGLEB01C
FabrikantHoneywell
62,69 €
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Roller Plunger SPDT NO/NC IP66 10 A Die Cast Zinc 300V 250V Snap-On Snap Action GLE PG13.5 Connector 50mm 65mm
RS-stocknr. 125-8467
FabrikantnummerXCKVR54D1H29
145,00 €
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Crossed Rods Lever 4P 2NC IP65 10 A PBT+PC GF30 FR, Plastic 240V 125V Screw Clamp Slow Action OsiSense XC Screw 200mm 57mm
RS-stocknr. 808-7654
FabrikantnummerGLLA01C
FabrikantHoneywell
17,78 €
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Roller Plunger SPDT NO/NC IP66 10 A Plastic 300V 250V 1/2 in Conduit Snap Action GLL - 30.5mm 62mm
RS-stocknr. 808-2678
Fabrikantnummer914CE2-3A
FabrikantHoneywell
79,99 €
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Roller Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE Wire Lead 40mm 16mm
RS-stocknr. 447-3812
FabrikantnummerZCMD25
40,70 €
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- DP NO/NC IP66, IP67 1.5 A Zinc Alloy 240V 250V - Slow Action OsiSense XC Plug 50mm 30mm
RS-stocknr. 609-6631
FabrikantnummerXCMD2102M12
67,70 €
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Plunger DP NO/NC IP66, IP67, IP68 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC M12 Connector 50mm 30mm
RS-stocknr. 235-981
FabrikantnummerXCKM102H29
48,60 €
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Aantal stuks
Roller Plunger DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS-stocknr. 360-8427
FabrikantnummerZCKJ1H29
35,80 €
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Aantal stuks
- DP NO/NC IP65 10 A Metal 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS-stocknr. 822-5614
FabrikantnummerZ-15GW2-B7-K
FabrikantOmron
16,75 €
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Roller Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V M4 Snap Action - Screw 49.2mm 29.4mm
RS-stocknr. 808-2568
Fabrikantnummer914CE1-3
FabrikantHoneywell
54,87 €
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Aantal stuks
Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE Wire Lead 40mm 16mm
RS-stocknr. 808-2735
Fabrikantnummer914CE3-3
FabrikantHoneywell
76,21 €
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Aantal stuks
Roller Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE Wire Lead 40mm 16mm
RS-stocknr. 821-0381
FabrikantnummerBZE7-2RQ8-PG
FabrikantHoneywell
152,76 €
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Roller Plunger SPDT NO/NC IP50 15 A Die Cast Aluminium 125 V, 250 V, 480 V 125 V, 250 V PG 13.5 Snap Action - PG13.5 - -
RS-stocknr. 235-997
FabrikantnummerXCKM121H29
48,40 €
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Plunger DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS-stocknr. 418-6063
FabrikantnummerXCKS149
55,50 €
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Aantal stuks
Lever DP NO/NC IP65 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
RS-stocknr. 757-9216
FabrikantnummerD4NL-1AFG-B
FabrikantOmron
134,34 €
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Various Options - 1NC/1NO + 1NC/1NO IP67 - Plastic - - - Slow Action D4NL PG13.5 95mm 88.5mm
RS-stocknr. 836-2731
FabrikantnummerD4B4A11N
FabrikantOmron
56,85 €
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Roller Lever - 2NC IP67 - Metal - - Screw - D4B - 40mm 62mm
RS-stocknr. 814-7996
FabrikantnummerXCMD2116C12
73,90 €
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Roller Lever DPST NO/NC IP66, IP67, IP68 4 A Zamak® Zinc Alloy 60V - M12 Snap Action OsiSense XC 5-Pin Connector 50mm 30mm