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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Beskrivning Pris 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-artikelnummer 755-7865
Tillv. art.nr3SE5413-0CD20-1EA2
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632,38 kr
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Roller Plunger DPST NO/NC - - - - - Cable - 3SE5 - 50mm 30mm
RS-artikelnummer 749-7631
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607,85 kr
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Roller Lever DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 56mm
RS-artikelnummer 749-7571
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Plunger DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 40.5mm
RS-artikelnummer 498-961
Tillv. art.nr3SE5112-0BA00
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404,17 kr
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- DP NO/NC - - Metal - - Screw - 3SE5 - 85.7mm 40.5mm
RS-artikelnummer 749-7600
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661,17 kr
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Plunger 3PST NO/2NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 40.5mm
RS-artikelnummer 768-6462
Tillv. art.nr3SE5112-0PA00
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Round Plunger - 2NO/NC - - Metal - - Screw - 3SE5 - 40.5mm 37.3mm
RS-artikelnummer 768-6474
Tillv. art.nr3SE5112-0CA00
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388,17 kr
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Round Plunger - NO/NC - - Metal - - Screw - 3SE5 - 40.5mm 37.3mm
RS-artikelnummer 749-7577
Tillv. art.nr3SE5112-0BH01
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697,43 kr
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Twist Lever DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 40.5mm
RS-artikelnummer 749-7681
Tillv. art.nr3SE5232-0LD03
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342,31 kr
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Roller Plunger 3PST NO/2NC IP65 - Plastic - - Screw - 3SE5 - 75.7mm 31mm
RS-artikelnummer 749-7599
Tillv. art.nr3SE5112-0CH50
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721,95 kr
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Twist Lever DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 40.5mm
RS-artikelnummer 227-977
Tillv. art.nr3SE5232-0HC05
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248,47 kr
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Plunger - NO/NC IP65 - Plastic - - Screw - 3SE5 - 75.7mm 31mm
RS-artikelnummer 684-2908
Tillv. art.nr3SE5112-0CH01
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Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119.5mm 37.3mm
Nytt
RS-artikelnummer 213-1282
Tillv. art.nr3SE5232-0HK80
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Rod Lever - 1NO/1NC IP65 4 A Plastic 400V - - - - - - -
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RS-artikelnummer 213-1250
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Rotary - 1NO/2NC IP66, IP67 4 A Metal 400V - - - - - - -
RS-artikelnummer 498-848
Tillv. art.nr3SE5232-1LC05
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488,41 kr
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Plunger - 2NC/1NO IP65 - Plastic - - Screw - 3SE5 - 75.7mm 31mm
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RS-artikelnummer 213-1283
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Rod Lever - 1NO/1NC IP65 4 A Plastic 400V - - - - - - -
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RS-artikelnummer 213-1294
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Roller - 1NO/1NC IP66/IP67 4 A Plastic 400V - - - - - - -
RS-artikelnummer 203-3913
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Plunger - 1 NO/2 NC IP65 6 A Plastic 400V - - Snap Action - - - -
RS-artikelnummer 768-6355
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Round Plunger - NO/2NC - - Plastic - - Screw - 3SE5 - 50mm 33mm
RS-artikelnummer 749-7580
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Plunger DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 40.5mm