Coil
Relay coil
The operating element associated with a relay and its separately drawn contacts.
Schematic
Symbols · TOFF NO
Off-delay normally-open contact
An off-delay NO contact retains the documented operated state for an interval after the timer trigger is removed.
Schematic · TOFF NO
What it represents
An off-delay NO contact retains the documented operated state for an interval after the timer trigger is removed. The actual timer timing chart establishes the switching sequence.
How to read it
- Check the output's state during supply loss separately from normal trigger removal.
- 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
- Identify timer reference
- Label delayed release
- Reference supply-loss state
A distinction that matters
Off-delay release requires a stated sequence; the NO label alone only identifies the reference contact state.
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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