PROX CAP
Capacitive proximity switch
A capacitive proximity switch detects a target through a change in its sensing capacitance.
Schematic
IEC · CAP
IEC capacitive proximity sensor: normally closed 3 wire
Capacitive proximity sensor form: Normally Closed 3 Wire.
In plain English
What does IEC capacitive proximity sensor: normally closed 3 wire mean?
A capacitive proximity sensor detects a change of capacitance caused by a target entering its sensing field. This entry identifies the normally closed 3 wire form in the publisher's IEC-context family.
A simple example
A vessel wall or nearby material can change the measured capacitance and indicate a level or presence condition. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. The three-wire form distinguishes supply, return and switching output. Confirm sourcing or sinking operation from the actual sensor circuit before connecting it to an input.
What the drawings help you do
Material, mounting, contamination and adjustment affect operation; a capacitive mark does not guarantee detection through every container or medium.
This particular reference
Capacitive proximity sensor form: Normally Closed 3 Wire. This entry adds the normally closed 3 wire detail to the broader capacitive proximity sensor family. Material, mounting, contamination and adjustment affect operation; a capacitive mark does not guarantee detection through every container or medium.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Terminal
- An identified point where a conductor connects.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
Read the source: AutoCAD Electrical: Capacitive proximity switches
IEC · Normally Closed 3 Wire
Autodesk IEC-60617 Symbol Preview: Capacitive Switches, HPX12C3 / VPX12C3. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · CAP
What it represents
A capacitive proximity sensor detects a change of capacitance caused by a target entering its sensing field. This entry identifies the normally closed 3 wire form in the publisher's IEC-context family.
A vessel wall or nearby material can change the measured capacitance and indicate a level or presence condition. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. The three-wire form distinguishes supply, return and switching output. Confirm sourcing or sinking operation from the actual sensor circuit before connecting it to an input.
Material, mounting, contamination and adjustment affect operation; a capacitive mark does not guarantee detection through every container or medium.
How to read it
- The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state.
- The three-wire form distinguishes supply, return and switching output. Confirm sourcing or sinking operation from the actual sensor circuit before connecting it to an input.
- Material, mounting, contamination and adjustment affect operation; a capacitive mark does not guarantee detection through every container or medium.
Information to show or reference
- Identify the target, sensing mode and expected normal condition.
- Label supply, output and connector pins from the actual device diagram.
- Reference output circuit type, operating range and controller input.
A distinction that matters
This entry adds the normally closed 3 wire detail to the broader capacitive proximity sensor family. Material, mounting, contamination and adjustment affect operation; a capacitive mark does not guarantee detection through every container or medium.
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: Capacitive proximity switches
Public Capacitive Switches table explicitly lists HPX12C3 / VPX12C3 with this operating or connection form. Vendor graphics are linked, not copied.
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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