{"schemaVersion":1,"slug":"ansi-ultrasonic-nc-switching-output","name":"ANSI/IEEE Ultrasonic NC switching output form","kind":"symbol","abbreviation":"HPX12U","aliases":["HPX12U","VPX12U","IEEE Ultrasonic Switch, Normally Closed","ANSI Ultrasonic NC switching output"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of ultrasonic nc switching output: this form identifies a normally-closed switching output in the ultrasonic sensor family.","description":["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."],"readingNotes":["Identify the reference sensing condition and connected control input.","Normally closed does not imply a safety-rated diagnostic output."],"drawingChecklist":["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."],"distinction":"Normally closed does not imply a safety-rated diagnostic output.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Ultrasonic Switches; published form: Ultrasonic Switch, Normally Closed."},{"label":"Public vendor block","value":"HPX12U. Vendor library token, not an IEEE symbol number."},{"label":"Information added","value":"Identify the reference sensing condition and connected control input."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"Artwork scope","value":"Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified."}],"references":[{"sourceId":"s28-ieee-ultrasonic-switches","relevance":"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."}],"related":["iec-ultrasonic-nc-switching-output","current-transformer","voltage-transformer"],"artwork":"s28-ansi-ultrasonic-nc-switching-output","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Ultrasonic Switch, Normally Closed","reference":"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.","counterpart":"iec-ultrasonic-nc-switching-output"},"plainEnglish":{"title":"What does ANSI/IEEE Ultrasonic NC switching output form mean?","introduction":"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.","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.","drawings":"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.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."},{"name":"Rating","meaning":"A value stating the conditions for which equipment is specified."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Autodesk IEEE Symbol Preview: Ultrasonic Switches","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B9F9E342-BC89-4736-B60A-5A2F326BF3BF.htm"}],"detail":"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.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-ultrasonic-nc-switching-output","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-ultrasonic-nc-switching-output.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"s28-ieee-ultrasonic-switches","title":"Autodesk IEEE Symbol Preview: Ultrasonic Switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B9F9E342-BC89-4736-B60A-5A2F326BF3BF.htm","type":"cad-reference","scope":"Public ultrasonic switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"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."}]}