BOURNS EN SERIES OPTICAL ENCODER

ENC1J-D28-L00128L

ANTI-ROTATION

LUG POSITION

Code

D

J

P

Description

None

9:00 Position

Rear Mount-

ing Bracket

SHAFT LENGTH*

Code

16

20

24

28

Description

1/2 " Long

5/8 " Long

3/4 " Long

7/8 " Long

RoHS IDENTIFIER

Code

L

Description

Compliant

SWITCHING

CONFIGURATION

Code

1

Description

Channel A

Leads

Channel B

By 90

°

(Clockwise

Rotation)**

TERMINAL***

CONFIGURATION

Code

L

R

M

N

W

Y

Description

Axial, Multi-

Purpose Pin

Radial, Multi-

Purpose Pin

Axial, Ribbon

& Connector

10 “

Radial, Ribbon

& Connector

10 ”

Axial, Ribbon

10 “ -

No Connector

Radial, Ribbon

10 ” -

No Connector

RESOLUTION

Code

00025

00050

00064

00100

00125

00128

00200

00256

Cycles Per

Revolution

25

50

64

100

125

128

200

256

SHAFT STYLE

Code

B

D

C

Use With

Bushings (Code)

A, S

C, T, W

A, S

Description

1/4 " Dia., Plain End

1/8 " Dia., Plain End

1/4 " Dia., Single

Flatted

BUSHING CONFIGURATION

Code

A

C

S

T

W

Description

3/8 "D X 3/8 "L Threaded

1/4 "D X 1/4 "L Threaded

3/8 "D X 3/8 "L Threaded

(Ball Bearing)

1/4 "D X 3/8 "L Threaded

(Ball Bearing)

Servo Mount 7/8 "D

(Ball Bearing)

* Shaft length measured from mounting surface.

** 25 and 50 PPR is reversed (Channel B leads Channel A).

*** Standard ribbon cable is 10 " long. Consult factory for other lengths.

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

EN - Rotary Optical Encoder

How To Order

REV. 06/12

GENERAL INFORMATION

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.

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 inter-

connects 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.