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
Nieuw
RS-stocknr. 213-1242
Fabrikantnummer3SE5112-0BH50
FabrikantSiemens
€ 67,40
Each
Aantal stuks
Rotary - 1NO/1NC IP66, IP67 4 A Metal 400V - - - - - - -
Nieuw
RS-stocknr. 213-1279
Fabrikantnummer3SE5232-0HD10
FabrikantSiemens
€ 36,40
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Roller Plunger - 1NO/1NC IP65 4 A Plastic 400V - - - - - - -
RS-stocknr. 203-3912
Fabrikantnummer3SE5112-0CH02
FabrikantSiemens
€ 72,80
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Rotary - 1 NO/1 NC IP66/IP67 6 A Metal 400V - - Snap Action - - - -
RS-stocknr. 179-9869
FabrikantnummerXCKMR54D1
€ 214,00
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Stay Put Crossed Rods Lever Metal 4P 2 x (2NC) IP66 3 A Metal 240V 125V Screw Slow Break OsiSense XC Screw 200mm 59mm
RS-stocknr. 223-3224
FabrikantnummerGLAC20D
FabrikantHoneywell
€ 97,68
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Roller Lever DPDT 2NO/2NC IP67 6 A Die Cast Zinc 600V 250V - Snap Action GLA 20 mm Conduit 145.8mm 42mm
RS-stocknr. 195-1741
FabrikantnummerZCMC21T1
€ 32,62
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Aantal stuks
- 2P 1NC/1NO - - - - - Cable Snap Action ZCMC - 1m -
RS-stocknr. 827-9226
FabrikantnummerDZ-10GV-1B
FabrikantOmron
€ 30,97
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Lever DPDT 2NO/2NC IP00 10 A - 250V 250V Screw Snap Action - Screw 49.2mm 17.45mm
Nieuw
RS-stocknr. 217-7115
Fabrikantnummer2LS1-4PG
FabrikantHoneywell
€ 122,15
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Top Plunger DPDT 1NC 1NO IP67 10 A Zinc Die-Cast 480V ac - - Snap - - - -
RS-stocknr. 177-9027
FabrikantnummerSK-Bet.M4 kpl. m.Kap.
FabrikantBernstein AG
€ 3,18
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Aantal stuks
- - NC IP65 - Thermoplastic PA - - - - SK - 52mm 29mm
RS-stocknr. 207-2007
FabrikantnummerGLBC02D
FabrikantHoneywell
€ 93,18
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Roller Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action GLB 20 mm Conduit 145.8mm 42mm
RS-stocknr. 132-9184
FabrikantnummerXCSPL762
€ 47,10
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Straight Lever DP 2NC IP67 - Nylon 66, Plastic - - M16 - XCSPL - 30mm 103mm
Nieuw
RS-stocknr. 213-1248
Fabrikantnummer3SE5112-0CH82
FabrikantSiemens
€ 71,90
Each
Aantal stuks
Rotary - 1NO/1NC IP65, IP67 4 A Metal 400V - - - - - - -
RS-stocknr. 144-8400
FabrikantnummerSZL-VL-S-D-N-M
FabrikantHoneywell
€ 26,73
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Top Pin Plunger SPDT NO/NC IP67 0.05 (220 V dc) A, 0.5 (380 V ac) A Glass-Filled Die-Cast Metal 380V 220V M12 Cable Gland Snap Action SZL-VL M12 Connector 28.5mm 100.2mm
RS-stocknr. 853-6829
FabrikantnummerGLZ320
FabrikantHoneywell
€ 53,63
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Aantal stuks
- DPDT 2NO/2NC - - - - - - Snap Action GLZ - - -
RS-stocknr. 195-1718
FabrikantnummerXCRB15
€ 301,12
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Roller Lever DPST 2NC/2NO IP54 3 A Zinc Alloy 240V 250V PG 13.5 Snap Action XCR Screw 85mm 75mm
RS-stocknr. 203-3885
Fabrikantnummer3SE5112-1LA00
FabrikantSiemens
€ 58,00
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Basic Switch DPDT 1 NO/2 NC IP66/IP67 10 A Metal 400V - - Snap Action - - - -
Nieuw
RS-stocknr. 214-6719
FabrikantnummerD4N-1232
FabrikantOmron
€ 20,43
Each
Aantal stuks
Top Roller Plunger - 2NC IP67 - - - - - Snap Action - - - -
RS-stocknr. 189-5269
Fabrikantnummer6088817009
FabrikantBernstein AG
€ 28,84
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Roller DPST 2NC IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 240V Screw Slow Action, Snap Action TI2 - 30mm 63.3mm
RS-stocknr. 902-6944
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Plunger DPST NO/NC IP67 5 A Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 60mm
RS-stocknr. 195-1717
FabrikantnummerXCRA12
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Roller Lever DPST 2NC/2NO IP54 3 A Zinc Alloy 240V 250V PG 13.5 Snap Action XCR Screw 85mm 75mm