{"schemaVersion":1,"slug":"iec-combined-photoelectric-sensor-normally-closed-emitter-receiver-ac-dc-driven-2-pin","name":"IEC combined photoelectric sensor: normally closed emitter-receiver AC/DC driven 2 pin","kind":"symbol","abbreviation":"TX","aliases":["HPE12B22","VPE12B22","combined photoelectric sensor Normally Closed Emitter-Receiver AC/DC Driven 2 PIN"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"Combined photoelectric sensor form: Normally Closed Emitter-Receiver AC/DC Driven 2 PIN.","description":["A combined photoelectric sensor contains an emitter and a receiver within the same documented sensing unit. This entry identifies the normally closed emitter-receiver ac/dc driven 2 pin form in the publisher's IEC-context family.","A reflective sensing arrangement can detect a passing object or a change in returned light and send the result to a control input. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. The two-connection interface must be read with the load and supply arrangement. Leakage current and minimum load can matter where a powered device is connected in series with an input.","The publisher identifies an AC/DC supply form. Its permissible voltage range and the connected input still need to match the selected equipment. The combined housing does not establish whether a reflector or the target returns the light. Sensing mode, light-on or dark-on selection and pin functions need the selected product diagram."],"readingNotes":["The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state.","The two-connection interface must be read with the load and supply arrangement. Leakage current and minimum load can matter where a powered device is connected in series with an input.","The publisher identifies an AC/DC supply form. Its permissible voltage range and the connected input still need to match the selected equipment.","The combined housing does not establish whether a reflector or the target returns the light. Sensing mode, light-on or dark-on selection and pin functions need the selected product diagram."],"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 closed emitter-receiver ac/dc driven 2 pin detail to the broader combined photoelectric sensor family. The combined housing does not establish whether a reflector or the target returns the light. Sensing mode, light-on or dark-on selection and pin functions need the selected product diagram.","facts":[{"label":"Drawing form","value":"Normally Closed Emitter-Receiver AC/DC Driven 2 PIN"},{"label":"Public vendor block names","value":"HPE12B22 / VPE12B22. Autodesk identifiers, not standards database IDs."},{"label":"Drawing purpose","value":"combined photoelectric sensor"},{"label":"Graphic scope","value":"Independently authored educational illustration; not certified standard geometry, a terminal pinout or a product footprint."}],"references":[{"sourceId":"pub-symbol-optical-sensors","relevance":"Public Photoelectric Emitter/Receiver Switches table explicitly lists HPE12B22 / VPE12B22 with this operating or connection form. Vendor graphics are linked, not copied."}],"related":["photoelectric-emitter-receiver-switch","plc-digital-input","terminal"],"artwork":"s28-iec-combined-photoelectric-sensor-normally-closed-emitter-receiver-ac-dc-driven-2-pin","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Normally Closed Emitter-Receiver AC/DC Driven 2 PIN","reference":"Autodesk IEC-60617 Symbol Preview: Photoelectric Emitter/Receiver Switches, HPE12B22 / VPE12B22. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted."},"plainEnglish":{"title":"What does IEC combined photoelectric sensor: normally closed emitter-receiver AC/DC driven 2 pin mean?","introduction":"A combined photoelectric sensor contains an emitter and a receiver within the same documented sensing unit. This entry identifies the normally closed emitter-receiver ac/dc driven 2 pin form in the publisher's IEC-context family.","example":"A reflective sensing arrangement can detect a passing object or a change in returned light and send the result to a control input. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. The two-connection interface must be read with the load and supply arrangement. Leakage current and minimum load can matter where a powered device is connected in series with an input.","drawings":"The publisher identifies an AC/DC supply form. Its permissible voltage range and the connected input still need to match the selected equipment. The combined housing does not establish whether a reflector or the target returns the light. Sensing mode, light-on or dark-on selection and pin functions need the selected product diagram.","terms":[{"name":"DC","meaning":"Direct current: electricity flowing in one direction."},{"name":"AC","meaning":"Alternating current: electricity whose direction changes periodically."},{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."}],"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: Photoelectric emitter/receiver switches","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-15ABE47A-723F-4004-BF2A-9CC285DE7882.htm"}],"detail":"Combined photoelectric sensor form: Normally Closed Emitter-Receiver AC/DC Driven 2 PIN. This entry adds the normally closed emitter-receiver ac/dc driven 2 pin detail to the broader combined photoelectric sensor family. The combined housing does not establish whether a reflector or the target returns the light. Sensing mode, light-on or dark-on selection and pin functions need the selected product diagram.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-combined-photoelectric-sensor-normally-closed-emitter-receiver-ac-dc-driven-2-pin","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-combined-photoelectric-sensor-normally-closed-emitter-receiver-ac-dc-driven-2-pin.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-optical-sensors","title":"AutoCAD Electrical: Photoelectric emitter/receiver switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-15ABE47A-723F-4004-BF2A-9CC285DE7882.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 Photoelectric Emitter/Receiver Switches table explicitly lists HPE12B22 / VPE12B22 with this operating or connection form. Vendor graphics are linked, not copied."}]}