Electrocomponents
Precision, Long-life
Compact 12mm Size
Optical Encoder
Features
• Package Size (12 X 14 X 7 mm)
•
3 Million life cycles (No detent)
•
1 Million life cycles(With detent)
• Durable Metal Shaft & Bushing
•
Optional momentary switch
•
Multiple options for terminations,
resolution,cables, voltage
• RoHS Compliant
®
Series 291
Data Sheet
Optical Encoder
Electrical and Mechanical Specifications
Encoder:
Operating Voltage
5.0 ± 0.25 VDC
3.3 ± 0.125 VDC
Supply Current
5.0 VDC @ 30mA maximum
3.3 VDC @ 24mA maximum
Output Code
2-Bit Quadrature
Channel A leads channel B by 90°
electrically during clockwise rotation
of the shaft
Minimum Sink Current
2.0 mA for 5.0 VDC
1.0 mA for 3.3 VDC
Power Consumption
150 mW maximum for 5.0 VDC
80 mW maximum for 3.3 VDC
Rotational Torque
Running: 20 ± 10 gf-cm
Detent: 140 ± 50 gf-cm (24
Detents)
100 ± 50 gf-cm (32
Detents)
Detent Options
0, 24, 32
1-3
CTS Electrocomponents
Resolution
6, 8 Pulses per Revolution
Rotational Life (@30 RPM)
3 Million cycles (No detent)
1 Million cycles (With detent)
Temperature Range
Operating: - 40°C to 85°C
Storage: - 55°C to 100°C
Push-Pull Strength of Shaft
20 kg minimum for 10 seconds
Terminal Pull-out Strength
6 kg minimum for 10 seconds
Solder Heat Resistance
350°C for 5 seconds
Mechanical Vibration
15G, ( MIL-STD-883F-2004)
Mechanical Shock
100G, ( MIL-STD-883F-2004)
Special
Consult CTS for custom features not
listed
7/17/12
© 2011 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
Electrical and Mechanical Specifications
(continued)
Optional Momentary Switch:
Switch Contact Resistance
10 Ω maximum
Switch Rating
5 VDC @ 10 mA
Switch Travel
0.5 ± 0.25 mm
TYPE 291V
Actuation Force
510 ± 110 grams
Switch Life
Standard: 1 Million actuations minimum
Special: Consult CTS for custom life
requirements.
2-Bit Encoder With Momentary Switch, Shaft Perpendicular to PC Board
Ø
.250
±
.002
6.35
±
0.05
.488
12.40
.218
±
.002
5.53
±
0.05
.250
±
.002
6.35
±
0.05
.250
6.35
.031
0.79
3/8-32UNEF-2A
THREAD
L
±
.014
±
0.35
B
R
.047
1.19
.281
7.13
.354
9.00
.541
13.75
CENT.
.024
0.60
6
5
4
3
2
1
.423
±
.014 .148
10.75
±
0.35 3.75
.291
7.40
PINS ARE
0.4 SQUARE
.250
6.35
.050
1.27
.246
±
.015
6.25
±
0.38
CENT.
GENERAL TOLERANCE
:
±
.010 inch
±
0.25 mm
DIMENSION:
inch
mm
TYPE 291C
2-Bit Encoder With Momentary Switch, Cable, and Connector
.218
±
.002
5.53
±
0.05
.250
±
.002
6.35
±
0.05
Ø
6.35
.250
±
.002
±
0.05
.488
12.40
.031
0.79
THEAD
3/8 32 UNEF-2A
L
±
.014
±
0.35
B
R
.047
7.13
.250
6.35
.541
13.75
CONNECTOR IS AMP
P/N 215083-6
OR EQUIVALENT
.291
7.40
6
5
4
3
2
.354
9.00
CENT.
.281
7.13
1
.024
0.60
.148
3.75
GENERAL TOLERANCE
:
±
.010 inch
±
0.25 mm
CABLE LENGTH
See Termination Options
7/17/12
2-3
CTS Electrocomponents
© 2011 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
ELECTRIC CIRCUITRY AND WAVEFORM
PIN#
POWER
CHANNEL A
R
*
R
*
Standard Quadrature 2-Bit Code
8 PPR/ 32 DETENTS
CW
6
5
4
3
2
1
CHANNEL B
CHANNEL A
1 PULSE
HIGH
CHANNEL B
SWITCH TERMINAL
SWITCH TERMINAL
LOW
HIGH
LOW
1
2
3
4
5
6
Nominal Detent Position
GROUND
POSITION NUMBER
1. 8 PPR/32 detents is shown
2. Code repeats every 4 positions
3. Channel A Leads Channel B in CW direction
and lags in CCW direction
* External pull-up resistors required for operation(2.2K ohm)
Shaft Trim
”z”
”
x
”
”
x
” ”
Y
”
X
Imperial Shaft .250”
Metric Shaft 6.35
R - ROUND
F - FLATTED
X
Y
Z
Imperial Shaft .250” .218” .250”
Metric Shaft 6.35 5.53 6.35
DIMENSION:
inch
mm
Ordering Information
291
TERMINATION
V1
0
22
F
SHAFT TRIM
832
A
OPERATING VOLTAGE
B
SWITCH
A
- NONE
B
- MOMENTARY
V1
- .050” Pitch Center Pins Form to Rear
with .144 length
C4
- .050” Pitch Center 4” Ribbon Cable with
Connector
- .050” Pitch Center 5” Ribbon Cable with
C5
Connector
C6
- .050” Pitch Center 6” Ribbon Cable with
Connector
Connector is AMP P/N 215083-6 or Equivalent
R
- ROUND
F
- FLATTED
A
- 5.0V
B
- 3.3V
"L" SHAFT LENGTH
mm
A5
- 15mm
B0
- 20mm
B5
- 25mm
C0
- 30mm
inch
20
- .625"
22
- .688"
24
- .750"
28
- .875"
32
- 1.000"
"B"
BUSHING LENGTH
mm
D
- 9.53mm
OUTPUT COMBINATION
832
624
800
600
- 8PPR, 32-DETENTS
- 6PPR, 24-DETENTS
- 8PPR, NO DETENTS
- 6PPR, NO DETENTS
inch
2
- .250”
3
- .375”
0
- .312”
3/8-32 UNEF-2A
ALL
ALL
6.35mm Dia. .250" Dia.
M9X.75P
3-3
CTS Electrocomponents
© 2011 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
7/17/12
DIY/Open Source Hardware
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