Enclosed Incremental
Rotary Optical Encoder
E20
Standard Features
• Line counts up to 2540 PPR
• Open collector differential 7406 buffer driver
in the E202 and E203
• RS422 compatible 26LS31
differential line driver in the E206
• Index pulse
• 3 mounting configurations
• Focused IR/LED
• 100 kHz frequency response
• 2-year warranty
Series
The E20 Series was developed to
provide high precision angular position
signals at an affordable price.
The design consists of a patented
glass disc and hub assembly, focused
infrared light source, a proprietary
monolithic photodetector array, and
signal conditioning electronics.
The models E202 and E203
encoders offer 7406 open collector
outputs yielding temperature stability
and the ability to transmit signals long
distances with high noise immunity.
The model E206, with its 26LS31
line driver output is available for
applications where RS422 compatibility
is needed.
Reliability is assured through the use of a single LED
source and collimating lens. Hybrid electronic circuitry
and common substrate arrays further enhance long-term
operation and temperature stability.
Proven design and BEI experience make the models
E202, E203 and E206 bargains for the robotic, process
control, instrumentation and related markets.
Figure 1
Servo Mount
1.66
(47)
Figure 2
Flange Mount
(Dimensions not shown, same as Figure 1)
.125
(3.2)
.12
(3)
.11
(2.8)
.50
(15)
.2497 +0000
(6,34) -0003
+000
-002
.687
(17.45)
1.875
(47.6)
#4-40 THDS. X .20 DP
ON 1.00 DIA. B.C.
(25.4)
.18
(4.5)
.875 TYP.
(22.2)
2.05
(52.3)
2.06 SQ.
52.3
STRAIN
RELIEF
8 PIN
HEADER
All dimensions in inches
.xx = ±.02
.xxx = ±.005
.125 DIA
4 PLCS.
(3.2)
15771 Red Hill Avenue
Tustin, CA 92780-7303
(714) 258-7500 Fax: (714) 258-4629
email: sales@beiduncan.com
www.beiduncan.com
ISO9001 Certified/QS9000 Compliant
E20 Series
Enclosed Incremental Rotary Optical Encoder
Performance Specifications
Mechanical
Dimensions
Weight
Shaft Size
Shaft Load
Torque, Starting
Running
Inertia
1.8 x 10
-4
oz. in./sec
2
see Figures 1 and 2
4 oz.
0.2497 +0.0000 -0.0003
axial 4 lbs., radial 8 lbs.
less than 0.4 oz. in.
less than 0.2 oz. in.
Termination Options
Header
Mating Connector
included
Terminal board
8 pin single row PC board header
(Molex 22-23-2081 or equivalent)
Molex 22-01 3087 or equivalent with
crimp terminals for 22-30 AWG wire
1/16" circuit board, 2 rows of 8 holes,
0.40 dia. plated through on
0.10 centers for 22-30 AWG wire
Electrical
Code
incremental
Pulses per Revolution
see “Ordering Information”
Supply Voltage
+5V ±5% @ 135mA max.
Output Format
dual channel quadrature with complements.
Index with complements available.
Output Type (E202, E203)
TTL buffer/driver (7406)
Output Voltage
1k ohm pull-up resistor
5.5V min. breakdown
Sink Current
40mA
Output Type (E206) TTL differential line driver (26LS31 or equiv.)
should be terminated into a line receiver
(26LS32, or equivalent circuit)
Frequency Response
data & index 100 kHz
Environmental
Temperature
Less than 1800 PPR
1800 PPR or greater
Figure 4
360°E NOM.
180°E NOM.
90°E NOM.
A
A
Operating 0°
Storage -25°
Operating 0°
Storage -25°
to
to
to
to
+70°C
+90°C
+55°C
+90°C
B
B
Figure 3
Pinout
87654321
A
A
Z - index
Z- index
+5v
GND
B
B
90°E TO 450°E
INDEX
INDEX
INDEX
CW ROTATION OF SHAFT
E202 OUTPUTS A & B ONLY
E203 OUTPUTS A, B & INDEX ONLY
E206 OUTPUTS AS SHOWN
Ordering Information
E20 X - XXXX - X - X
Basic Model No.
Output Format
2 = Quadrature w/complements
3 = Quadrature w/index & complements
(7406 buffer drive)
6 = Quadrature w/index & complements
(26LS31 line driver)
Pulses Per Revolution (PPR)
See Table 1
Mounting and Termination
1 = Servo mount w/header
2 = Servo mount w/terminal board
3 = Flange mount w/header
4 = Flange mount w/terminal board
Options
0 = Open Collector (E202 & E203 only)
1 = 1k pull-up resistor (E202 & E203 only)
EXAMPLE: E202-1000-1-1
Table 1
5
10
20
80
100
120
200
250
256
300
360
500
510
512
625
640
720
1000
1024
1140
1386
1500
1600
1800
2000
2048
2400
2500
2514
2540
Specifications subject to change without notice. Printed in U.S.A.
BE0025-E20-1001
15771 Red Hill Avenue
Tustin, CA 92780-7303
(714) 258-7500 Fax: (714) 258-4629
email: sales@beiduncan.com
www.beiduncan.com
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