Coil
Relay coil
The operating element associated with a relay and its separately drawn contacts.
Schematic
Symbols · TOFF NC
Off-delay normally-closed contact
An off-delay NC contact returns to its documented normally-closed state after the delay following removal of the timing trigger.
Schematic · TOFF NC
What it represents
An off-delay NC contact returns to its documented normally-closed state after the delay following removal of the timing trigger. Its role is read from the complete timer and contact circuit.
How to read it
- Identify whether this delayed return affects a permissive, indication or another timer.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Link timer trigger
- Show delayed return
- State configured interval
A distinction that matters
Contact polarity and timing direction are separate pieces of information.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Time-delay relays
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
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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