HEDR-5420-ES211 - Agilent / Hewlett-Packard

Agilent HEDR-542x Miniature

Reflective Optical Encoder

Product Brief

Introduction

Agilent’s optical encoders are

used in a variety of motion

control applications to provide

position, velocity and direction

sensing.

About the Products

The HEDR-542x is an easy-to-

mount, high-performance,

reliable, two-channel encoder.

The HEDR-542x offers a resolu-

tion of 200 counts per revolution,

featuring typically less than

15 electrical degrees pulse width

error (PWE) and less than 30 elec-

trical degrees for combined phase

and state width error.

The HEDR-542x is ideal for

equipment using small and

miniaturized motors, operating

within the 0oC to +85oC tempera-

ture range, and operating from a

5-volt supply.

Product Mechanism

HEDR-542x encoders translate the

rotary motion of a shaft into a

two-channel digital quadrature

output. The light emitted from a

LED is focused onto a reflective

codewheel. As the shaft moves, the

codewheel rotates, reflecting light

from an alternating bright and

dark pattern. The transitions are

detected by a photodetector IC.

Features and Benefits

• PWE <15 degrees

SWE <30 degrees

– Accurate system control

• Small footprint

– Saves space on PCB; can be

used in small motor system

where space is a constraint

• Cost effective solution

– Value added at low cost

• Several mounting options are

available

– Press fit, set screw and mount-

ing ears to suit design and size of

motors

• Easy assembly

– Shortens assembly time

Typical Applications

• Vending machines

• Volumetric dispenser

• Card readers

(automated teller machines)

• Robotics

• Security camera controls

• Paper feed control

(office automation)

www.agilent.com/semiconductors

For product information and a complete list of

distributors, please go to our web site.

For technical assistance call:

Americas/Canada: +1 (800) 235-0312 or

(408) 654-8675

Europe: +49 (0) 6441 92460

China: 10800 650 0017

Hong Kong: (+65) 271 2451

India, Australia, New Zealand: (+65) 271 2394

Japan: (+81 3) 3335-8152(Domestic/International), or

0120-61-1280(Domestic Only)

Korea: (+65) 271 2194

Malaysia, Singapore: (+65) 271 2054

Taiwan: (+65) 271 2654

Data subject to change.

Obsoletes 5988-4974EN

January 9, 2002

5988-5388EN

Agilent Miniaturized Reflective Optical Kit Encoder Product Selection

Part Number Resolution Shaft Size Connector Hub

HEDR-5420-ES201 200 CPR 0.08" (2 mm) Axial Set screw with mounting ears

HEDR-5420-ES202 200 CPR 0.12" (3 mm) Axial Set screw with mounting ears

HEDR-5420-ES203 200 CPR 0.13" (3.30 mm) Axial Set screw with mounting ears

HEDR-5420-ES211 200 CPR 0.16" (4 mm) Axial Set screw with mounting ears

HEDR-5420-ES214 200 CPR 0.20" (5 mm) Axial Set screw with mounting ears

HEDR-5421-EP111 200 CPR 0.16" (4 mm) Right Angle Press fit without mounting ears

Figure 1. Encoder Used in a Vending Machine.

(drawing not to scale)

Figure 2. Encoder Used in a Banking Autoteller Machine.

(drawing not to scale)

Figure 3. Encoder Used in a Volumetric Dispenser Machine.

(drawing not to scale)

Schematics of Typical Applications of HEDR-542x

CANS

DOOR

MOTOR

HEDR-542x

MOVING PART

WITH SENSOR

BALL SCREW

MOTOR ROLLER

HEDR-542x

CARD

ROLLER

BELT

CARD READER

BELT

LEAD SCREW

GEARED MOTOR

HEDR-542x

SYRINGE