PIR
Intruder motion detector plan symbol
Security plan symbol for a passive infrared or dual-technology motion detector reporting to an intruder alarm.
IEC
IEC · PIR-L
Lighting presence detector plan mark
Plan mark for a ceiling or wall sensor that switches lighting automatically according to occupancy.
In plain English
What does Lighting presence detector plan mark mean?
Lighting presence detectors switch or dim luminaires according to occupancy, usually by passive infrared or microwave sensing. Plans show a small circle or square with a detection mark, often with the coverage radius drawn so designers can check the area is covered.
A simple example
The plan should also show whether the detector operates in presence mode (automatic on and off) or absence mode (manual on, automatic off) and whether it includes a daylight sensor. These settings strongly affect energy performance and are often stated in a lighting control schedule.
What the drawings help you do
This lighting sensor is distinct from an intruder alarm motion detector even when the sensing principle is the same. The two belong to different systems with different wiring and standards.
This particular reference
Plan mark for a ceiling or wall sensor that switches lighting automatically according to occupancy. An intruder motion detector reports to an alarm panel; a lighting presence detector controls luminaires.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: IEC graphical symbols for diagrams · Autodesk IEC-60617 preview: Radiation qualifiers
IEC · Presence detector for lighting
IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
GA · PIR-L
What it represents
Lighting presence detectors switch or dim luminaires according to occupancy, usually by passive infrared or microwave sensing. Plans show a small circle or square with a detection mark, often with the coverage radius drawn so designers can check the area is covered.
The plan should also show whether the detector operates in presence mode (automatic on and off) or absence mode (manual on, automatic off) and whether it includes a daylight sensor. These settings strongly affect energy performance and are often stated in a lighting control schedule.
This lighting sensor is distinct from an intruder alarm motion detector even when the sensing principle is the same. The two belong to different systems with different wiring and standards.
How to read it
- Check the coverage pattern against the room geometry.
- Confirm whether the sensor controls a switching relay, a DALI group or a local load directly.
Information to show or reference
- State presence or absence mode.
- Show coverage radius.
- Link the controlled luminaire groups.
A distinction that matters
An intruder motion detector reports to an alarm panel; a lighting presence detector controls luminaires.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
IEC graphical symbols for diagrams
IEC graphical symbol context; independently drawn here.
Autodesk IEC-60617 preview: Radiation qualifiers
Public IEC-oriented radiation qualifiers relevant to infrared sensing marks.
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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IEC
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