{"schemaVersion":1,"slug":"iec-signal-transmission-qualifier","name":"Signal-transmission qualifier","kind":"symbol","abbreviation":"Q020504","aliases":["Signal-transmission qualifier symbol","Q020504","Signal-transmission qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A transmission qualifier identifies the sending role of a signal interface.","description":["A transmission qualifier identifies the sending role of a signal interface. Transmission identifies the source role of a signal relationship. It can be used beside a transducer, communications interface or other function whose output is conveyed elsewhere.","Identify the receiving function through a tag or cross-reference. Signal units and electrical interface details belong in the associated I/O or communications schedule."],"readingNotes":["Label the signal and the connected receiving function.","A transmitter-role indication does not identify the physical medium or electrical levels."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the signal and the connected receiving function.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A transmitter-role indication does not identify the physical medium or electrical levels.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020504 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the signal and the connected receiving function."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-propagation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-signal-transmission-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Signal-transmission qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-signal-transmission-qualifier","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-signal-transmission-qualifier.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-public-propagation","title":"Autodesk IEC-60617 preview: Propagation and signal-flow qualifiers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1C0C7AE2-F703-4283-BCB1-3E0B30882715.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}]}