{"schemaVersion":1,"slug":"iec-simultaneous-bidirectional-propagation-qualifier","name":"Simultaneous bidirectional propagation qualifier","kind":"symbol","abbreviation":"Q020502","aliases":["Simultaneous bidirectional propagation qualifier symbol","Q020502","Simultaneous bidirectional propagation qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier distinguishes a path supporting propagation in both directions at the same time.","description":["This qualifier distinguishes a path supporting propagation in both directions at the same time. The represented interface supports sending and receiving in opposite directions simultaneously. That operating relationship is separate from the physical media and protocol.","A communications drawing should identify each endpoint and the actual interface. The qualifier supplies a direction relationship without declaring a network implementation."],"readingNotes":["State the interface and communication arrangement represented.","A bidirectional graphic does not specify a communication protocol or throughput."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the interface and communication arrangement represented.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A bidirectional graphic does not specify a communication protocol or throughput.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020502 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the interface and communication arrangement represented."},{"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-simultaneous-bidirectional-propagation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Simultaneous bidirectional propagation 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-simultaneous-bidirectional-propagation-qualifier","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-simultaneous-bidirectional-propagation-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."}]}