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Avago: Optical Kit Encoder (HEDS-5500/5540, HEDS-5600/5640, and HEDM-5500/5600)
Avago: Optical Kit Encoder (HEDS-5500/5540, HEDS-5600/5640, and HEDM-5500/5600)


 
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Avago: Quick Assembly Two and Three Channel Optical Kit Encoder (HEDS-5500/5540, HEDS-5600/5640, and HEDM-5500/5600)

Description

The HEDS-5500/5540, HEDS-5600/5640, and HEDM-5500/5600 are high performance, low cost, two and three channel optical incremental kit encoders. These kit encoders emphasize high reliability, high resolution, and easy assembly.

Each kit encoder contains a lensed LED source, an integrated circuit with detectors and output circuitry, and a codewheel which rotates between the emitter and detector IC. The outputs of the HEDS-5500/5600 and HEDM-5500/ 5600 kit encoders are two square waves in quadrature. The HEDS-5540 and 5640 kit encoders also have a third channel index output in addition to the two channel quadrature. This index output is a 90 electrical degree, high true index pulse which is generated once for each full rotation of the codewheel.

The HEDS kit encoders series utilizes metal codewheels, while the HEDM kit encoders series utilizes a film codewheel allowing for resolutions to 1024 CPR. The HEDM series kit encoders are not available with a third channel index.

These kit encoders may be quickly and easily mounted to a motor. For larger diameter motors, the HEDM-5600, and HEDS-5600/5640 feature external mounting ears.

The quadrature signals and the index pulse are accessed through five 0.025 inch square pins located on 0.1 inch centers.

Standard resolutions between 96 and 1024 counts per revolution are presently available. Consult local Avago Technologies sales representatives for other resolution options.

Features

  • Two Channel Quadrature Output with Optional Index Pulse

  • Quick and Easy Assembly

  • No Signal Adjustment Required

  • External Mounting Ears Available

  • Low Cost

  • Resolutions Up to 1024 Counts Per Revolution

  • Small Size

  • -40 degrees C to 100 degrees C Operating Temperature

  • TTL Compatible

  • Single 5 V Supply

Applications

The HEDS-5500, 5540, 5600, 5640, and the HEDM-5500, 5540,5600 provide motion detection at a low cost, making them ideal for high volume applications. Typical applications include printers, plotters, tape drives, positioning tables, and automatic handlers.

Note: Avago Technologies encoders are not recommended for use in safety critical applications. Eg. ABS braking systems, power steering, life support systems and critical care medical equipment. Please contact sales representative if more clarification is needed.


Transmissive Encoders

The Transmissive Encoder is an emitter/detector module. Coupled with a code wheel, this transmissive encoder translates rotary motion of a shaft into digital output. The transmissive encoder contains a single Light Emitting Diode (LED) as its light source. The light is collimated into a parallel beam by means of a single polycarbonate lens located directly over the LED. Opposite the emitter is the integrated detector circuit.

This IC consists of multiple sets of photodetectors and the signal processing circuitry necessary to produce the digital waveforms. The code wheel rotates between the emitter and detector of the transmissive encoder, causing the light beam to be interrupted by the pattern of spaces and bars on the code wheel. The photodiodes which detects these interruptions are arranged in a pattern that corresponds to the radius and design of the code wheel. These detectors are also spaced such that a light period on one pair of detectors corresponds to a dark period on the adjacent pair of detectors. Avago offers an extensive range of transmissive encoders to meet the different needs of a wide variety of applications.

Model No.: HEDM-5500, HEDM-5600, HEDM-5640, HEDS-5500, HEDS-5540, HEDS-5600, HEDS-5640

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