# Three-wire inductive proximity switch

Canonical URL: https://eloragrid.ai/symbols/three-wire-inductive-proximity-switch
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: PROX IND 3W
Drawing use: Schematic
Reference families: IEC, Manufacturer

A three-wire inductive proximity switch uses separate supply, common and output conductors.

## 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

## Important distinction

Three-wire construction describes wiring; NO or NC describes the output's documented switching behaviour.

## Facts

- Drawing role: Actuated indication
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HPX11IN3, VPX11IN3 (Autodesk identifiers; not IEC symbol numbers)
- Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name.

## Public references

- [AutoCAD Electrical: Inductive proximity switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-596652AB-6555-4F9A-B575-555D40C2ECD4.htm) — Autodesk. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.