# IEC capacitive proximity sensor: normally open 3 wire with connector Canonical URL: https://eloragrid.ai/symbols/iec-capacitive-proximity-sensor-normally-open-3-wire-with-connector Publisher: Elora Grid Updated: 2026-10-28 Lookup label: CAP Drawing use: Schematic Reference families: IEC, Manufacturer ## Symbol convention Convention: IEC Form: Normally Open 3 Wire with connector Autodesk IEC-60617 Symbol Preview: Capacitive Switches, HPX11C3C / VPX11C3C. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted. Capacitive proximity sensor form: Normally Open 3 Wire with connector. ## In plain English ### What does IEC capacitive proximity sensor: normally open 3 wire with connector mean? A capacitive proximity sensor detects a change of capacitance caused by a target entering its sensing field. This entry identifies the normally open 3 wire with connector 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-open designation starts with a non-conducting output or open 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 The connector variant adds a separable field interface. Keep the mating connector designation, pin numbers and cable-core mapping visible at that boundary. 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 Open 3 Wire with connector. This entry adds the normally open 3 wire with connector 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. ### Terms - 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. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [AutoCAD Electrical: Capacitive proximity switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F2CC4639-9203-4C6A-8A9F-2A32717D2BE3.htm) ## 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 open 3 wire with connector 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-open designation starts with a non-conducting output or open 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. The connector variant adds a separable field interface. Keep the mating connector designation, pin numbers and cable-core mapping visible at that boundary. 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-open designation starts with a non-conducting output or open 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. - The connector variant adds a separable field interface. Keep the mating connector designation, pin numbers and cable-core mapping visible at that boundary. - 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. ## Important distinction This entry adds the normally open 3 wire with connector 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. ## Facts - Drawing form: Normally Open 3 Wire with connector - Public vendor block names: HPX11C3C / VPX11C3C. Autodesk identifiers, not standards database IDs. - Drawing purpose: capacitive proximity sensor - Graphic scope: Independently authored educational illustration; not certified standard geometry, a terminal pinout or a product footprint. ## Public references - [AutoCAD Electrical: Capacitive proximity switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F2CC4639-9203-4C6A-8A9F-2A32717D2BE3.htm) — Autodesk. Public Capacitive Switches table explicitly lists HPX11C3C / VPX11C3C with this operating or connection form. Vendor graphics are linked, not copied. ## 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.