PLC I/O
PLC input / output
A controller interface point connecting field signals to an identified module channel.
Schematic
Symbols · TC
Thermocouple
A thermocouple produces a temperature-dependent voltage associated with its dissimilar-metal junction system.
Schematic · TC
What it represents
A thermocouple produces a temperature-dependent voltage associated with its dissimilar-metal junction system. Correct type, polarity and extension wiring matter when connecting it to an instrument.
How to read it
- Trace the thermocouple terminals and specified extension cable 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
- State thermocouple type
- Mark polarity
- Reference input and compensation arrangement
A distinction that matters
A thermocouple generates a voltage signal; an RTD changes resistance.
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: Instrumentation and sensors
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
RTD and thermocouple temperature transducer inputs
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.
Explore related references
Put the reference into a drawing workflow.
Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.