HEDR-5421-EP111 [AVAGO]

Mid-Sized Housed Encoder;


型号：	HEDR-5421-EP111
厂家：	AVAGO TECHNOLOGIES LIMITED
描述：	Mid-Sized Housed Encoder 编码器光电
文件：	总11页 (文件大小：166K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HEDR-54xx Series

Mid-Sized Housed Encoder

Data Sheet

Description

Features

The HEDR-542x series are high performance, cost-eﬀec-  Two channel quadrature output

tive, two-channel optional incremental housed encoders.

These encoders emphasize high reliability, high resolution,

and easy assembly. The HEDR-542x housed encoders use

 Quick and easy assembly

 Cost-eﬀective

reﬂective technology to sense rotary position. This sensor  Ideal for small motor systems

consists of an LED light source and a photodetector IC in

a single SO-8 surface mount package. The outputs of the

HEDR-542x encoders are two square waves in quadrature.

 -10° C to +85 °C operating temperature

 Right angle connector available

These encoders may be quickly and easily mounted to a  Hub available in either a set screw conﬁguration or a

motor.

press-ﬁt/adhesive mount conﬁguration

 External mounting ears available

Applications

The HEDR-542x provides motion detection at a low cost,

making them ideal for high volume applications. Typical

applications include vending machines and motor manu-

facturing applications.

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 clariﬁcation is needed.

Available Styles

External mounting ears version (shown here

with set screw type hub)

Right angle version (shown here with press

ﬁt/adhesive mount hub option)

ESD WARNING: Normal Handling Precautions should be taken to avoid static discharge.

Package Dimensions

GND

DETAIL A

14.4

13.9

11.7

1.5

+5 V

NC GND

Ø23.0

GND

DETAIL B

13.9

11.7

1.5

GND NC

A +5 V B

Ø23.0

17.4 17.9

15.2

5.0

Ø23.0

8.5

17.9

15.2

5.0

46.0

52.0

2.0

NOTE: TYPICAL DIMENSIONS IN MILLIMETERS

Theory of Operation

The HEDR-542X translates rotary motion of a shaft into a

two channel digital output. As seen in the block diagram,

the HEDR-542X series has three key parts: a single Light

Emitting Diode (LED) light source, a photodetector IC

with a set of uniquely conﬁgured photodiodes, and a pair

of lenses. The lens over the LED focuses light onto the

codewheel. Light is either reﬂected or not reﬂected back

to the lens over the photodetector IC. As the codewheel

rotates an alternating pattern of light and dark corre-

sponding to the pattern of the codewheel falls upon the

photodiodes. This light is used to produce internal signals

A and A', and B and B'. As part of this "push-pull" detector

system, these signals are fed through comparators that

are part of the signal processing circuitry to produce the

ﬁnal outputs for channels A and B.

LED

CODEWHEEL

GND

CH A

CH B

SIGNAL

PROCESSING

CIRCUITRY

GND

Deﬁnitions

Pulse Width Error (P): The deviation in electrical degrees of

Count(N): Forrotarymotion, thenumberofbarandwindow

pairs or Counts Per Revolution (CPR) of the codewheel. For

linear motion, the number of bar and window pairs per

unit length (Lines Per Inch [LPI] or Lines Per mm [LPmm]).

the pulse width from its ideal value of 180°e.

State Width (S): The number of the electrical degrees

between a transition in the output of the channel B. There

are 4 states per cycle, each nominally 90°e.

One Cycle (C): 360 electrical degree (°e), 1 bar and window

pair.

State Width Error (S): The deviation in electrical degrees of

each state width from its ideal value of 90°e.

One Shaft Rotation: 360 mechanical degrees, N cycles

(rotary motion only).

Phase (): The number of electrical degrees between the

center of the high state on the channel A and the center

of the high state of channel B. This value is nominally 90°e.

Line Density: The number of reﬂective and non-reﬂective

pairs per unit length, expressed as either Lines Per Inch

(LPI) or Lines Per mm (LPmm).

Phase Error (): The deviation in electrical degrees of the

phase from its ideal value of 90°e.

Pulse Width (P): The number of electrical degrees that an

output is high during one cycle, nominally 180°e or 1/2

a cycle.

Output Waveforms

Direction of Motor Rotation

CH. I

When the codewheel rotates in the

clockwise direction (as viewed from the

encoder end of the motor), channel A will

lead channel B. If the codewheel rotates in

the counterclockwise direction, channel B

will lead channel A.

ALL FOUR STATES (S1 TO S4)

ARE MAINTAINED

CH. A

CH. B

CODEWHEEL ROTATION

Absolute Maximum Ratings

Storage Temperature

-40° C to +85° C

-10°-C to +85°-C

-0.5 V to 7 V

Operating Temperature

Supply Voltage

Output Voltage

-0.5 V to V_CC

Output Current per Channel

-2.0 mA to 12 mA

0.25 mm

Shaft Axial Play

Shaft Eccentricity Plus Radial Play

Radial Play between Housing and Cover

Distance between Tip of Codewheel Shaft and PC Board

Distance between Codewheel and Stopper before Reset

Distance between Codewheel and Stopper after Reset

Concentricity Misalignment between Mounted Base

0.04 mm

0.2 mm – 0.5 mm

0.4 mm – 0.5 mm

0.25 mm – 0.35 mm

0.75 mm

0.12 mm

Plate Center Bore and Motor Shaft

Frequency

16 kHz

Recommended Operating Conditions

Parameter

Symbol

T_A

Min.

Typical

Max.

Units

°C

Notes

Temperature

Supply Voltage

LED Current

V_CC

I_LED

C_L

4.5

5.0

5.5

Volts

Ripple < 100 mV_p–p

2.7 K Pull-Up

Load Capacitance

100

Electrical Characteristics

(Over recommended operating conditions. Typically at 25° C)

Parameter

Symbol

I_CC

Min.

Typical

Max.

Units

Notes

Supply Current

High Level Output Voltage

Low Level Output Voltage

V_OH

V_OL

2.4

I_OH= –2 mA min.

I_OL= 12 mA max.

0.4

Encoding Characteristics

Parameter

Symbol

P

Typical

Max.

Units

°e

Pulse Width Error

State Width Error

Phase Error

S

°e



°e

Position Error

Cycle Error



120

arcmin

°e

C

Mechanical Characteristics

Parameter

Dimension

Tolerance

Units

Codewheel Fits these Standard Shaft Diameters

Press Fit/Adhesive Mount Hub

Set Screw Hub

2, 3, 4

2, 3, 4, 5, (1/8)

+0/–0.01

(+0/–0.0005)

(in.)

Allowable Motor Shaft Length

Press Fit/Adhesive Mount Hub

Set Screw Hub (uses size M1.5 Allen wrench, not included)

Between 7.5 and 8.0

Between 7.5 and 11.5

Bolt Circle Diameter (2 holes)

Mounting Screw Size

16 to 18

(in.)

M2.5, (2-56) for external

mounting ears

Pins conﬁguration HEDR-542x series

Electrical Interface

Pin 1

Pin 2

Pin 3

Pin 4

Pin 5

GND

Pull up resistors on output pins 2, 3, and 5 have already

been integrated into the mid-sized encoder. Each of the

three encoder outputs can drive a single TTL load in this

conﬁguration.

Ch.A

5 V

Ch.B

Connectors

The connector to be used with the mid-sized encoder

is Molex Part Number 51021-0500. This is a 5 connector

crimp wire to board connector.

The connector used on the encoder is orientation proof

type, 2 diﬀerent cables conﬁguration required for connec-

tion to right angle and axial angle type encoder.

Standard Mounting

Mounting Considerations

The mid-sized encoder must be aligned using the optional aligning pins, as speciﬁed in Figure 1, by using the optional

motor boss shown in Figure 2, or by using an alignment tool or as shown in Encoder Mounting and Assembly.

OPTIONAL MOTOR BOSS -

DIAMETER 9.96/10.01

MAX HEIGHT 1.5

OPTIONAL ALIGNMENT PINS -

DIAMETER 1.940/2.007. 2 PLACES

ON 14.50 DIAMETER CIRCLE.

MAX HEIGHT 1.9

SHAFT LENGTH

M2 2 PLACES EQUALLY SPACED

ON BOLT CIRCLE BETWEEN

16 AND 20

Figure 1.

Mounting with External Ears

OPTIONAL ALIGNMENT PINS-

DIAMETER 1.940/2.007. 2 PLACES

ON 14.50 DIAMETER CIRCLE.

MAX HEIGHT 1.9

OPTIONAL MOTOR BOSS - DIAMETER 9.96/10.01

MAX HEIGHT 1.5

M2 2 PLACES EQUALLY SPACED

ON DIAMETER 46 BOLT CIRCLE

SHAFT LENGTH

Figure 2.

Encoder Mounting and Assembly

Press Fit Style Encoder

BASE PLATE

1. If not using optional alignment pins or motor boss to

locate the base plate, slip alignment tool onto motor

shaft. Slip encoder base plate into place on motor

as shown below. Tighten screws or attach with an

adhesive. If using alignment tool, remove it.

ALIGNMENT TOOL

MOTOR

2. Place the hub in the housing assembly on top of the

motor shaft. Lining up the guide (connector side) at

the bottom of the housing with the slot (indicator side)

on the encoder base plate, the housing latches should

be aligned to the respective baseplate catches now.

Press the housing assembly downward and slide the

hub into and along the shaft, until the 3 latches make

contact with the catches.

MOTOR SHAFT

LATCH

(3 POSITION)

GUIDE

(CONNECTOR SIDE)

CATCH

(3 POSITION)

INDICATOR

SLOT (INDICATOR SIDE)

30.0°

60.0°

INDICATOR

NOTE:

THIS IS A TOP VIEW OF THE BASE PLATE.

INDICATOR IS ALSO INDICATING THE

CONNECTOR DIRECTION. ANGULAR OFFSET

TO OPTIONAL ALIGNMENT PIN IS 60°.

TOLERANCE FOR THE ANGLE IS 2°.

3. Press down the housing assembly until it snaps into 4. Using the end of a pen or other appropriate tool,

place. Recommended force is 3.5 kgf minimum, 4.0 kgf

nominal, and 4.5 kgf maximum. Note that the encoder

is shipped such that the housing assembly and the

base plate are not being snapped together.

press the triangular portion of the housing assembly

downward. Recommended force is between 3.5 kgf

to 4.0 kgf. This will set the codewheel and hub into

their proper position through the internalguide of the

triangular piece. When the triangular piece is released,

it should naturally spring back to its original position,

eliminating contact between the housing assembly

and the codewheel. The encoder is now ready for use.

ALIGNMENT TOOL

BASE PLATE

Set Screw Style Encoder

1. If not using optional alignment pins or motor boss to

locate the base plate, slip alignment tool onto motor

shaft. Slip encoder base plate into place on motor

as shown below. Tighten screws or attach with an

adhesive. If using alignment tool, remove it.

MOTOR

2. Slip the set screw hub into the shaft. Proper ﬁnger-wear must be worn to avoid contamination on codewheel surface

(top of hub). Place an Allen wrench into the socket of the set screw while aligning it on the Allen wrench groove.

Lining up the guide (connector side) at the bottom of the housing with the slot (indicator side) on the encoder

baseplate, the housing latches should be aligned to the respective baseplate catches. Move the housing assembly

downward until the 3 latches make contact with the catches.

HOUSING ASSEMBLY

MOTOR SHAFT

GUIDE

(CONNECTOR

SIDE)

SET SCREW HUB

ALLEN

WRENCH

SLOT

(INDICATOR SIDE)

ALLEN WRENCH GROOVE

3. Press down the housing assembly, holding the set

screw and Allen wrench in their initial position until

the housing assembly snaps into place. Recommended

force is 3.5 kgf minimum, 4.0 kgf nominal, and 4.5 kgf

maximum.

ALLEN WRENCH

MOTOR

4. Using the end of a pen or other appropriate tool,

press the triangular portion of the housing assembly

downward. Recommended force is between 3.5 kgf

to 4.0 kgf. Then apply a downward force on the end

of the Allen wrench. This sets the codewheel position

by levering the codewheel upward against internal

guide of the triangular piece. While continuing to

apply a downward force on both tools, rotate the Allen

wrench in the clockwise direction until the hub set

screw is tightened against the motor shaft. Remove the

Allen wrench by pulling it straight out of the housing

assembly. When the triangular piece is released, it

should naturally spring back to its original position,

eliminating contact between the housing assembly

and the codewheel. The encoder is now ready for use.

Ordering Information

*HEDR-5 4 X X – X X X X X

Shaft

Output

01 = 2 mm

02 = 3 mm

03 = 1/8 inch

11 = 4 mm

14 = 5 mm

2 = 2 channel

Connector

0 = standard/axial

1 = right angle/radial

Hub

S2 = Set screw with mounting ears base plate

P1 = Pressﬁt without mounting ears base plate

Resolution

E = 200 CPR

*Note: Part numbers currently available:

a. HEDR-5420-ES201

b. HEDR-5420-ES202

c. HEDR-5420-ES203

d. HEDR-5420-ES211

e. HEDR-5420-ES214

f. HEDR-5421-EP111

Ordering Information for Alignment Tool

HEDR-5900-000

Shaft

01 = 2 mm

02 = 3 mm

03 = 1/8"

11 = 4 mm

14 = 5 mm

For product information and a complete list of distributors, please go to our web site: www.avagotech.com

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.

AV02-3576EN - August 7, 2012

HEDR-5421-EP111 [AVAGO]

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