NO
Normally open contact
A contact shown open in the normal state defined for its device.
Schematic
Symbols · Coil
Relay coil
The operating element associated with a relay and its separately drawn contacts.
Schematic · Coil
What it represents
A relay coil represents an operating element that changes the state of associated contacts when the device operates. Coil and contact representations are often drawn in different locations to make the circuit easier to read. Their shared identifier and cross-references establish the relationship.
The coil representation does not determine whether its supply is AC or DC, its voltage, polarity, suppression or operating duty. Those details belong to the device specification and schematic annotations. Latching and other special operating modes need explicit identification.
How to read it
- Find the device tag and follow references to its contacts.
- Read supply and polarity information from the specified coil, not from an unqualified rectangle.
Information to show or reference
- Reference coil supply requirements.
- Identify suppression or polarity features if fitted.
- Cross-reference all associated contacts.
A distinction that matters
A relay coil is not a contactor power pole. Similar operating-element marks can represent equipment with different switching duties.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Relays and contacts: public symbol reference
Public relay-coil, latching and polarized variants.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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Normally closed contact
A contact shown closed in the normal state defined for its device.
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