{"schemaVersion":1,"slug":"ansi-three-wire-ultrasonic-sensor","name":"ANSI/IEEE Three-wire ultrasonic sensor form","kind":"symbol","abbreviation":"HPX11U3","aliases":["HPX11U3","VPX11U3","IEEE Normally Open 3 Wire","ANSI Three-wire ultrasonic sensor"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of three-wire ultrasonic sensor: this representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction.","description":["This reference locates three-wire ultrasonic sensor in Autodesk's IEEE-oriented ultrasonic switches family. This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction. The public library uses HPX11U3 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 supply, return and output from the selected device's terminal diagram. Three wires do not determine whether the output is sourcing, sinking or a particular voltage. Identify supply, return and output from the selected device's terminal diagram. Three wires do not determine whether the output is sourcing, sinking or a particular voltage. 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 supply, return and output from the selected device's terminal diagram.","Three wires do not determine whether the output is sourcing, sinking or a particular voltage."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify supply, return and output from the selected device's terminal diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Three wires do not determine whether the output is sourcing, sinking or a particular voltage.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Ultrasonic Switches; published form: Normally Open 3 Wire."},{"label":"Public vendor block","value":"HPX11U3. Vendor library token, not an IEEE symbol number."},{"label":"Information added","value":"Identify supply, return and output from the selected device's terminal diagram."},{"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 HPX11U3 as Normally Open 3 Wire. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["iec-three-wire-ultrasonic-sensor","current-transformer","voltage-transformer"],"artwork":"s28-ansi-three-wire-ultrasonic-sensor","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Normally Open 3 Wire","reference":"Autodesk IEEE Symbol Preview: Ultrasonic Switches, block HPX11U3. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"iec-three-wire-ultrasonic-sensor"},"plainEnglish":{"title":"What does ANSI/IEEE Three-wire ultrasonic sensor form mean?","introduction":"This reference locates three-wire ultrasonic sensor in Autodesk's IEEE-oriented ultrasonic switches family. This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction. The public library uses HPX11U3 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 supply, return and output from the selected device's terminal diagram. Three wires do not determine whether the output is sourcing, sinking or a particular voltage. Identify supply, return and output from the selected device's terminal diagram. Three wires do not determine whether the output is sourcing, sinking or a particular voltage. 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":"Terminal","meaning":"An identified point where a conductor connects."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."}],"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 three-wire ultrasonic sensor: this representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction. Three wires do not determine whether the output is sourcing, sinking or a particular voltage.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-three-wire-ultrasonic-sensor","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-three-wire-ultrasonic-sensor.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 HPX11U3 as Normally Open 3 Wire. This supports the vendor convention context, not reproduction of the publisher graphic."}]}