TS NO
Temperature switch NO
A temperature-operated NO switch changes from open to closed under its specified actuation condition.
Schematic
IEC · TS
Room thermostat plan mark
Plan mark for a wall-mounted room thermostat controlling heating or cooling equipment.
In plain English
What does Room thermostat plan mark mean?
A room thermostat is drawn as a small circle or square with a temperature mark, a theta or the letter T, at its wall position. A control link connects it to the heater, valve or air-conditioning unit it controls.
A simple example
Its position affects comfort: it should not be near heat sources, in direct sunlight or on an external wall. The plan gives the designer a chance to check this, and the mounting height is usually stated in notes.
What the drawings help you do
It does not show whether the thermostat switches mains directly or provides an extra-low-voltage control signal. Wiring type follows the controlled equipment.
This particular reference
Plan mark for a wall-mounted room thermostat controlling heating or cooling equipment. A schematic temperature switch shows a contact; the plan mark locates the room control.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: IEC graphical symbols for diagrams
IEC · Thermostat
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 · TS
What it represents
A room thermostat is drawn as a small circle or square with a temperature mark, a theta or the letter T, at its wall position. A control link connects it to the heater, valve or air-conditioning unit it controls.
Its position affects comfort: it should not be near heat sources, in direct sunlight or on an external wall. The plan gives the designer a chance to check this, and the mounting height is usually stated in notes.
It does not show whether the thermostat switches mains directly or provides an extra-low-voltage control signal. Wiring type follows the controlled equipment.
How to read it
- Check its position relative to heat sources.
- Identify what it controls.
Information to show or reference
- Link to controlled equipment.
- State control voltage.
- Give mounting height.
A distinction that matters
A schematic temperature switch shows a contact; the plan mark locates the room control.
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.
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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