Quick Assembly

Two and Three Channel Optical

Encoders

Technical Data

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

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

Temperature

• TTL Compatible

• Single 5 V Supply

Description

The HEDS-5500/5540, HEDS-

5600/5640, and HEDM-5500/

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

and 5640 also have a third chan-

nel 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 film codewheel

allowing for resolutions to 1024

CPR. The HEDM series is nont

available with a third channel

index.

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

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 Agilent sales representatives

for other resolutions.

Applications

The HEDS-5500, 5540, 5600,

5640, and the HEDM-5500, 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.

HEDM-550x/560x

HEDS-550x/554x

HEDS-560x/564x

Note: Agilent 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.