{"schemaVersion":1,"slug":"early-make-normally-open-contact","name":"Early-make normally-open contact","kind":"symbol","abbreviation":"NO EARLY","aliases":["HCR217F","VCR217F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An early-make NO contact closes earlier in the mechanism sequence than specified associated contacts.","description":["An early-make NO contact closes earlier in the mechanism sequence than specified associated contacts. The relative sequence is meaningful only when the linked contacts and common operator are identified."],"readingNotes":["Compare the contact timing against the other poles of the same device.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link common operator","Identify comparison contacts","Document switching sequence"],"distinction":"Early make is a relative operating sequence, not a fixed millisecond time delay.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR217F, VCR217F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-early-make-normally-open-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/early-make-normally-open-contact","illustration":{"url":"https://eloragrid.ai/library/illustrations/early-make-normally-open-contact.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"autodesk-contacts","title":"Relays and contacts: public symbol reference","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-011C62B8-9EC8-485C-B47D-B22A3F7B7574.htm","type":"cad-reference","scope":"Normally open, normally closed and changeover contacts, relay coils and latching relay variants.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}