EN – Rotary Optical Encoder

How To Order

BOURNS EN SERIES OPTICAL ENCODER

E NC1J-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 ϒ

(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) -

Not available with Anti-

Rotation Lug option

* 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.

**** Available with S, T, and W bushing configuration only.

Specifications are subject to change without notice.

Users should verify actual device performance in their specific applications.

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

REV. 11/22