PLC I/O
PLC input / output
A controller interface point connecting field signals to an identified module channel.
Schematic
Symbols · PHOTO
Photoelectric emitter-receiver switch
A photoelectric emitter-receiver device uses an optical path to determine a switching output.
Schematic · PHOTO
What it represents
A photoelectric emitter-receiver device uses an optical path to determine a switching output. The schematic needs the supply and output connections, while the layout defines the optical arrangement.
How to read it
- Establish whether the indicated state corresponds to a received or interrupted beam.
- 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
- Show supply and output
- Define light-on or dark-on function
- Reference emitter/receiver arrangement
A distinction that matters
Optical detection is not the same sensing principle as inductive or capacitive proximity.
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: Photoelectric emitter/receiver 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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