HEDM-55xx/560x & HEDS-55xx/56xx

Quick Assembly Two and Three Channel Optical Encoders

Data Sheet

ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.

Description

The HEDS-5500/5540, HEDS-5600/5640, HEDM-5500/5540

and HEDM-5600 are high performance, low cost, two

and three channel optical incremental encoders. These

encoders emphasize high reliability, high resolution, and

easy assembly.

Each 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

are two square waves in quadrature. The HEDS-5540/5640

and HEDM-5540 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 series utilizes metal codewheels, while the

HEDM series utilizes a lm codewheel allowing for resolu-

tions to 1024 CPR.

These 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 ve 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

sales representatives for other resolutions.

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°C to 100°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 applica-

tions include printers, plotters, tape drives, positioning

tables, and automatic handlers.

Note: Avago Technologies encoders are not recommend-

ed for use in safety critical applications. Eg. ABS braking

systems, power steering, life support systems and critical

care medical equipment. Please contact sales representa-

tive if more clarication is needed.