PLC I/O
PLC input / output
A controller interface point connecting field signals to an identified module channel.
Schematic
Symbols · PS NC
Pressure switch NC
A pressure-operated NC switch opens under its documented actuation condition.
Schematic · PS NC
What it represents
A pressure-operated NC switch opens under its documented actuation condition. Pressure threshold, reset behaviour and reference state are separate drawing annotations.
How to read it
- Read the pressure direction from the selected switch specification.
- 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
- Identify pressure connection
- Record operate and reset data
- Show contact logic
A distinction that matters
An NC pressure switch is different from a pressure transmitter producing a continuous analog signal.
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: Pressure and temperature 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.
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.