HIN1B13
Optical tachometric transducer
This representation identifies optical speed-sensing in the publisher's tachometric family.
IEC
IEEE / ANSI · TO
ANSI/IEEE optical tachometric dynamo symbol
IEEE-library optical tacho form for a speed sensor reading a slotted disc or reflective mark with light.
In plain English
What does ANSI/IEEE optical tachometric dynamo mean?
The optical form represents a speed sensor that detects light interrupted by a slotted disc or reflected from a mark on the shaft. It is common on encoders and non-contact speed checks, and its output is normally a pulse train passed to a counter, drive or speed relay.
A simple example
Optical sensors need a supply for the light source and are sensitive to dirt and alignment. The symbol does not show resolution, supply voltage or output stage type, so those details should be taken from the sensor data and the receiving input.
What the drawings help you do
Check supply and output stage type against the receiving input. Note resolution in pulses per revolution. The optical form identifies a light-based pickup; the impulse form identifies a pulse output without fixing the sensing principle.
This particular reference
IEEE-library optical tacho form for a speed sensor reading a slotted disc or reflective mark with light. The optical form identifies a light-based pickup; the impulse form identifies a pulse output without fixing the sensing principle.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Coil
- A wound conductor that can produce a magnetic field when energised.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
Read the source: Autodesk IEEE Symbol Preview — Instrumentation and Sensors · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
IEEE / ANSI · Autodesk IEEE-oriented Instrumentation and Sensors form: Tachometric Dynamo - Optical Type
Autodesk publishes this block under its IEEE Symbol Preview. The counterpart is the matching functional concept in the library; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · TO
What it represents
The optical form represents a speed sensor that detects light interrupted by a slotted disc or reflected from a mark on the shaft. It is common on encoders and non-contact speed checks, and its output is normally a pulse train passed to a counter, drive or speed relay.
Optical sensors need a supply for the light source and are sensitive to dirt and alignment. The symbol does not show resolution, supply voltage or output stage type, so those details should be taken from the sensor data and the receiving input.
How to read it
- Check supply and output stage type against the receiving input.
- Note resolution in pulses per revolution.
Information to show or reference
- State resolution
- Show sensor supply
- Reference the counting input
A distinction that matters
The optical form identifies a light-based pickup; the impulse form identifies a pulse output without fixing the sensing principle.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Instrumentation and Sensors
Public IEEE-oriented Instrumentation and Sensors preview listing the Tachometric Dynamo - Optical Type block and its vendor identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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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ANSI/IEEE impulse tachometric dynamo symbol
IEEE-library impulse tacho form for a speed sensor that outputs pulses at a rate set by shaft speed.
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IEEE-library tachometer instrument form showing where machine speed is indicated from a speed transducer.
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