{"schemaVersion":1,"slug":"iec-magnetic-proximity-sensor-normally-open-3-wire","name":"IEC magnetic proximity sensor: normally open 3 wire","kind":"symbol","abbreviation":"MAG","aliases":["HPX11M3","VPX11M3","magnetic proximity sensor Normally Open 3 Wire"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"Magnetic proximity sensor form: Normally Open 3 Wire.","description":["A magnetic proximity sensor responds to a magnetic field or a target carrying the specified magnet. This entry identifies the normally open 3 wire form in the publisher's IEC-context family.","A piston magnet or door-mounted magnet can provide a position indication without direct mechanical contact. The normally-open designation starts with a non-conducting output or open contact in the documented reference condition; operation changes that state. The three-wire form distinguishes supply, return and switching output. Confirm sourcing or sinking operation from the actual sensor circuit before connecting it to an input.","A magnetic sensor can contain a reed contact or powered electronics. The actual output, field orientation and contact ratings must come from the selected device."],"readingNotes":["The normally-open designation starts with a non-conducting output or open contact in the documented reference condition; operation changes that state.","The three-wire form distinguishes supply, return and switching output. Confirm sourcing or sinking operation from the actual sensor circuit before connecting it to an input.","A magnetic sensor can contain a reed contact or powered electronics. The actual output, field orientation and contact ratings must come from the selected device."],"drawingChecklist":["Identify the target, sensing mode and expected normal condition.","Label supply, output and connector pins from the actual device diagram.","Reference output circuit type, operating range and controller input."],"distinction":"This entry adds the normally open 3 wire detail to the broader magnetic proximity sensor family. A magnetic sensor can contain a reed contact or powered electronics. The actual output, field orientation and contact ratings must come from the selected device.","facts":[{"label":"Drawing form","value":"Normally Open 3 Wire"},{"label":"Public vendor block names","value":"HPX11M3 / VPX11M3. Autodesk identifiers, not standards database IDs."},{"label":"Drawing purpose","value":"magnetic proximity sensor"},{"label":"Graphic scope","value":"Independently authored educational illustration; not certified standard geometry, a terminal pinout or a product footprint."}],"references":[{"sourceId":"pub-symbol-magnetic-sensors","relevance":"Public Magnetic Switches table explicitly lists HPX11M3 / VPX11M3 with this operating or connection form. Vendor graphics are linked, not copied."}],"related":["magnetic-proximity-switch","plc-digital-input","terminal"],"artwork":"s28-iec-magnetic-proximity-sensor-normally-open-3-wire","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Normally Open 3 Wire","reference":"Autodesk IEC-60617 Symbol Preview: Magnetic Switches, HPX11M3 / VPX11M3. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted."},"plainEnglish":{"title":"What does IEC magnetic proximity sensor: normally open 3 wire mean?","introduction":"A magnetic proximity sensor responds to a magnetic field or a target carrying the specified magnet. This entry identifies the normally open 3 wire form in the publisher's IEC-context family.","example":"A piston magnet or door-mounted magnet can provide a position indication without direct mechanical contact. The normally-open designation starts with a non-conducting output or open contact in the documented reference condition; operation changes that state. The three-wire form distinguishes supply, return and switching output. Confirm sourcing or sinking operation from the actual sensor circuit before connecting it to an input.","drawings":"A magnetic sensor can contain a reed contact or powered electronics. The actual output, field orientation and contact ratings must come from the selected device.","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":"AutoCAD Electrical: Magnetic proximity switches","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B80666C6-215A-40C9-93CD-F394C29C3D33.htm"}],"detail":"Magnetic proximity sensor form: Normally Open 3 Wire. This entry adds the normally open 3 wire detail to the broader magnetic proximity sensor family. A magnetic sensor can contain a reed contact or powered electronics. The actual output, field orientation and contact ratings must come from the selected device.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-magnetic-proximity-sensor-normally-open-3-wire","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-magnetic-proximity-sensor-normally-open-3-wire.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-magnetic-sensors","title":"AutoCAD Electrical: Magnetic proximity switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B80666C6-215A-40C9-93CD-F394C29C3D33.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public Magnetic Switches table explicitly lists HPX11M3 / VPX11M3 with this operating or connection form. Vendor graphics are linked, not copied."}]}