# ANSI/IEEE Ultrasonic NC switching output form Canonical URL: https://eloragrid.ai/symbols/ansi-ultrasonic-nc-switching-output Publisher: Elora Grid Updated: 2026-10-28 Lookup label: HPX12U Drawing use: Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Ultrasonic Switch, Normally Closed Autodesk IEEE Symbol Preview: Ultrasonic Switches, block HPX12U. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier. Related representation: [Ultrasonic NC switching output](https://eloragrid.ai/symbols/iec-ultrasonic-nc-switching-output) IEEE-library form of ultrasonic nc switching output: this form identifies a normally-closed switching output in the ultrasonic sensor family. ## In plain English ### What does ANSI/IEEE Ultrasonic NC switching output form mean? This reference locates ultrasonic nc switching output in Autodesk's IEEE-oriented ultrasonic switches family. This form identifies a normally-closed switching output in the ultrasonic sensor family. The public library uses HPX12U for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. ### A simple example Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence. ### What the drawings help you do Identify the reference sensing condition and connected control input. Normally closed does not imply a safety-rated diagnostic output. Identify the reference sensing condition and connected control input. Normally closed does not imply a safety-rated diagnostic output. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ### This particular reference IEEE-library form of ultrasonic nc switching output: this form identifies a normally-closed switching output in the ultrasonic sensor family. Normally closed does not imply a safety-rated diagnostic output. ### Terms - Normally open / normally closed: The contact state in the normal condition defined for the drawing. - Signal: Electrical information passed between devices, rather than necessarily the main power supply. - Rating: A value stating the conditions for which equipment is specified. 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. - [Autodesk IEEE Symbol Preview: Ultrasonic Switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B9F9E342-BC89-4736-B60A-5A2F326BF3BF.htm) ## What it represents This reference locates ultrasonic nc switching output in Autodesk's IEEE-oriented ultrasonic switches family. This form identifies a normally-closed switching output in the ultrasonic sensor family. The public library uses HPX12U for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence. Identify the reference sensing condition and connected control input. Normally closed does not imply a safety-rated diagnostic output. Identify the reference sensing condition and connected control input. Normally closed does not imply a safety-rated diagnostic output. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ## How to read it - Identify the reference sensing condition and connected control input. - Normally closed does not imply a safety-rated diagnostic output. ## Information to show or reference - Identify the associated device, circuit or diagram boundary. - Identify the reference sensing condition and connected control input. - Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form. ## Important distinction Normally closed does not imply a safety-rated diagnostic output. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: Ultrasonic Switches; published form: Ultrasonic Switch, Normally Closed. - Public vendor block: HPX12U. Vendor library token, not an IEEE symbol number. - Information added: Identify the reference sensing condition and connected control input. - Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview: Ultrasonic Switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B9F9E342-BC89-4736-B60A-5A2F326BF3BF.htm) — Autodesk. Public IEEE-oriented Ultrasonic Switches table explicitly lists HPX12U as Ultrasonic Switch, Normally Closed. This supports the vendor convention context, not reproduction of the publisher 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.