Timed-operation qualifier

What it represents

A timed-operation qualifier identifies operation influenced by the documented timing function. A timing relationship describes when an action follows an initiating event. It does not decide whether the timing continues after the input disappears or how the function resets.

Document the input transition, the timed output and the intended timing mode. The main contact or actuator representation still supplies the resulting state.

How to read it

• State the trigger, timing mode and reset condition separately.
• A generic timing indication does not distinguish on-delay, off-delay or pulse operation.

Information to show or reference

• Identify the associated device, circuit or diagram boundary.
• State the trigger, timing mode and reset condition separately.
• Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

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.

Entry JSON · Entry Markdown · Last editorial update: 14 October 2026