ENS1J-B28-L00128L Bourns Inc., ENS1J-B28-L00128L Datasheet - Page 3

• Manufacturer Part Number: ENS1J-B28-L00128L
• Description: ENCODER OPTICAL ROTARY 128 CPR
• Manufacturer: Bourns Inc.
• Series: ENr

Specifications of ENS1J-B28-L00128L

• Pulses Per Revolution: 128
• Encoder Type: Optical
• Output Type: Quadrature (Incremental)
• Voltage - Supply: 5VDC
• Actuator Type: 1/4" Dia Round End
• Detent: No
• Built In Switch: No
• Mounting Type: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin
• Rotational Life (cycles Min): 200M
• No. Of Channels: 2
• Rotational Speed Max: 3000rpm
• Supply Voltage Range: 4.75VDC To 5.25VDC
• Rotational Life Cycles: 200000000
• Torque Max: 0.1in-oz
• Encoder Output: Square Wave Digital Pulse
• Mounting Style: Panel, PCB, Through Hole
• Output: 2 bit Gray Code
• Shaft Type: 1/4 in Diameter Plain
• With Switch: Without
• Supply Voltage: 5 V
• Operating Temperature Range: - 40 C to + 75 C
• Product: Optical
• Sensor Supply Voltage: 4.75VDC To 5.25VDC
• Rohs Compliant: Yes
• Encoder Resolution: 128CPR
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

GENERAL INFORMATION
The Bourns
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.
How To Order
EN - Rotary Optical Encoder
E N C 1 J - D 2 8 - L 0 0 1 2 8 L
®
EN model is a self-contained rotary optical encoder.
* Shaft length measured from mounting surface.
** 25 and 50 PPR is reversed (Channel B leads Channel A).
*** Only available with 50, 64, 100 and 128 PPR.
*** Standard ribbon cable is 10 " long. Consult factory for other lengths.
Code
BUSHING CONFIGURATION
W
A
C
S
T
Code
CONFIGURATION
1
2
BOURNS EN SERIES OPTICAL ENCODER
SWITCHING
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)
Code
ANTI-ROTATION
LUG POSITION
D
P
J
Description
Channel A
Leads
Channel B
By 90 °
(Clockwise
Rotation)**
Code 1
Switching
With Index
Channel***
Description
None
9:00 Position
Rear Mount-
ing Bracket
Code
B
D
C
Description
1/4 " Dia., Plain End
1/8 " Dia., Plain End
1/4 " Dia., Single
Flatted
SHAFT STYLE
Code
SHAFT LENGTH*
16
20
24
28
Bushings (Code)
Description
1/2 " Long
5/8 " Long
3/4 " Long
7/8 " Long
Code
CONFIGURATION
M
W
N
L
R
Y
TERMINAL****
Use With
C, T, W
A, S
A, S
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
Bourns encoder output signals are square wave digital pulses which
do not require debounce circuitry. Both features make it possible
to signifi cantly 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.
Customers should verify actual device performance in their specifi c applications.
00025
00050
00064
00100
00125
00128
00200
00256
Code
RESOLUTION
Cycles Per
Revolution
Code
Blank
100
125
128
200
256
25
50
64
RoHS IDENTIFIER
L
Specifi cations are subject to change without notice.
Description
Compliant
Non-Compliant
REV. 02/11