ENA1D-B28-N00050L(2006) View Datasheet(PDF) - Bourns, Inc

Part Name

Description

Manufacturer

ENA1D-B28-N00050L
(Rev.:2006)

Rotary Optical Encoder

Bourns, Inc 

GENERAL INFORMATION

The Bourns® EN model is a self-contained rotary optical encoder. It

produces a 2-bit quadrature signal which is suitable for digital systems

where both magnitude and direction of adjustment must be provided.

The EN encoder is ideal for use as a digital panel control or as a position

sensing device in applications where long life, reliability, high resolution

and precise linearity are critical.

The EN series encoder converts rotary input into electrical signals

which can be used by microprocessors without A/D conversion.

EN - Rotary Optical Encoder

Bourns encoder output signals are square wave digital pulses which do

not require debounce circuitry. Both features make it possible to

significantly reduce the memory overhead, wiring and wiring

interconnects required by other types of control devices.

EN optical encoders offer a useful rotational life of from 10 million to

200 million shaft revolutions, making them ideal for extended service

applications. The Bourns encoder is also compact and well suited for

situations where the available space is limited.

Dimensional Drawings

2.54

(.100)

TYP.

Optional

18.5

Radial Leads

(.73)

.635

(.025)

SQ.

6.35

(.250)

15.88

(.625)

6.342 + .000/ – .0076 DIA.

(.2497 + .000/ – .0003)

3/8-32 UNEF

9.525

(.375)

8.636

(.34 )

1/4-32 UNEF

3.167 + .000/ – .0076 DIA.

(.1247 + .000/ – .0003)

Bushing Style C

10.32 + .000/ – .0508

(.4062 + .000/ – .002) DIA.

9.53

(.375)

7.14 + .000/ – .0508

(.281 + .000/ – .002) DIA.

9.53

(.375)

1.37

(.054)

2.36

(.093)21.21

(.835)

9.53

(.375)

R.

.254 ± .076

(.010 .003)

9.53

(.375)

Bushing Style A

1.57

3/8-32 UNEF

(.062)

6.342 + .000/ – .0076 DIA.

(.2497 + .000/ – .0003)

Bushing Style S

(Ball Bearing)

1.57

1/4-32 UNEF

(.062)

3.167 + .000/ – .0076 DIA.

(.1247 + .000/ – .003)

Bushing Style T

(Ball Bearing)

.787 ± .254

(.031 ± .010)

Anti-rotation Lug

View

TERMINATION DIAGRAM

INDEX

OR CHANNEL A

GROUND N.C.

Vcc CHANNEL B

1.57

(.062)

21.8

(.86)

1.57

(.062)

1.57

(.062)

3.167 + .000/ – .0076 DIA.

(.1247 + .000/ – .003)

Optional

Radial Leads

-A

+

B

19.05 ± .0127 DIA.

(.7500 ± .0005)

22.2 + .0127 / – .1270 DIA.

(.875 + .0005 / – .0050)

Servo Mount Style W (Ball Bearing)

Consult factory for options not shown,

including:

• Wire lead or cable options

• Connectors

• Non-standard resolutions

• Special shaft/bushing sizes and

features

• Special performance characteristics

• PCB mounting bracket

6.34

(.2497)

5.54

SHAFT

LENGTH

SHAFT FLAT

LENGTH

(DIM. F)

F

(.218)

12.7

2.54

(.050)

(.100)

15.9

(.625)

5.08

(.200)

19.1

(.750)

8.25

(.325)

Shaft End Style C

11.13

(.438)

2.54

(.100)

4

PLCS.

4.14

(.163)

18.11

(.713)

0.99

9 PLCS.(.039) DIA. MIN.

6.99

2 PLCS.(.275)

Recommended Board Layout

with Bracket

Bushing with Bracket

Ribbon Cable Option

Rear Exit

Side Exit

— A +B

Ribbon Cable Option

Side Exit

Ribbon Cable Option Detail

Connector

Pinout

5

4

3

2

1

Connector

Pinout

5

4

3

2

1

DIMENSIONS:

MM

(IN.)

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

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