PCS
Power converter / inverter
An identified interface converting electrical power between documented circuit forms.
SLD / Schematic
IEC · Q020504
Signal-transmission qualifier
A transmission qualifier identifies the sending role of a signal interface.
IEC · Signal-transmission qualifier
Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · Q020504
What it represents
A transmission qualifier identifies the sending role of a signal interface. Transmission identifies the source role of a signal relationship. It can be used beside a transducer, communications interface or other function whose output is conveyed elsewhere.
Identify the receiving function through a tag or cross-reference. Signal units and electrical interface details belong in the associated I/O or communications schedule.
How to read it
- Label the signal and the connected receiving function.
- A transmitter-role indication does not identify the physical medium or electrical levels.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Label the signal and the connected receiving function.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
A transmitter-role indication does not identify the physical medium or electrical levels.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEC-60617 preview: Propagation and signal-flow qualifiers
Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.
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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