PLC I/O
PLC input / output
A controller interface point connecting field signals to an identified module channel.
Schematic
Symbols · PROX IND 3W
Three-wire inductive proximity switch
A three-wire inductive proximity switch uses separate supply, common and output conductors.
Schematic · PROX IND 3W
What it represents
A three-wire inductive proximity switch uses separate supply, common and output conductors. Its output polarity and load connection must match the receiving input module.
How to read it
- Follow the output common and receiving input polarity together.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Name three terminals
- State PNP or NPN as specified
- Reference PLC input compatibility
A distinction that matters
Three-wire construction describes wiring; NO or NC describes the output's documented switching behaviour.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Inductive proximity switches
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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