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
1-5
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)
Note:
Consult CTS for other common standard
features not listed.
6/13/13
© 2013 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
Actuation Force
510 ± 110 grams
Switch Life
Standard: 1 Million actuations minimum
Special: Consult CTS for custom life
requirements.
TYPE 291V1
2-Bit Encoder Without Schmitt Trigger, 0.05” Pitch Pins Formed to Rear
.218
±
.002
5.53
±
0.05
Ø
.250
±
.002
6.35
±
0.05
.218 ±0.002
5.53 ±0.05
.488
12.40
.250
±
.002
6.35
±
0.05
.250
6.35
3/8-32UNEF-2A
THREADS
.031
0.79
L
±
.014
±
0.35
B
.541
R
.047
1.19
.281
7.13
13.75
6
5
4
3
2
1
.423
±
.014 .148
10.75
±
0.35 3.75
.291
7.40
.354
9.00
CENT.
.024
0.60
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 Without Schmitt Trigger, with Cable and Connector
.218
±
.002
5.53
±
0.05
.250
±
.002
6.35
±
0.05
Ø
6.35
.250
±
.002
±
0.05
.218 ±0.002
5.53 ±0.05
.488
12.40
.031
0.79
3/8 32 UNEF-2A
THEADS
L
±
.014
±
0.35
B
R
.047
1.19
.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
.024
0.60
1
.148
3.75
GENERAL TOLERANCE
:
±
.010 inch
±
0.25 mm
CABLE LENGTH
See Termination Options
06/13/13
2-5
CTS Electrocomponents
© 2013 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
TYPE 291V1-S
2-Bit Encoder With Schmitt Trigger, 0.05” Pitch Pins Formed to Rear
.218
±
.002
5.53
±
0.05
.250
6.35
.250 ±0.002
6.35±0.05
.520
13.20 CENT.
.488
12.40
CENT.
.154 ±0.002
3.90 ±0.05
.066 ±0.002
1.68±0.05
3/8-32 UNEF-2A
THREADS
.014
L
±
0.35
±
.218 ±0.002
5.53 ±0.05
.250
6.35
.541
13.75
B
.417
10.58
6
5
4
3
2
1
.433 ±0.015
11.01±0.38
.142
3.61
.148
3.75
.291
7.40
.354
9.00 CENT.
.449
11.40 CENT.
.350 ±0.015
8.89 ±0.38
.050
1.27 TYP.
.250
6.35 CENT.
PINS ARE
0.40 SQUARE
GENERAL TOLERANCE
:
±
.010 inch
±
0.25 mm
TYPE 291P1
2-Bit Encoder With/Without Schmitt Trigger, 0.1” Pitch Pins Formed to Rear
.218
±
.002
5.53
±
0.05
.250
±
.002
6.35
±
0.05
.250 ±0.002
6.35±0.05
0.520
13.20
.488
12.40
.154 ±0.002
3.90 ±0.05
.066±0.002
1.68 ±0.05
3/8-32 UNEF-2A
THREADS
L
±
.014
±
0.35
B
.218±0.002
5.53 ±0.05
.250
6.35
.541
13.75
.560 ±0.014
14.21 ±0.35
.236
6.00
6
5
4
3
2
1
.291
7.40
.522
13.26
.500
12.70 CENT.
.602
15.30 CENT.
.100
2.54 TYP.
PINS ARE
0.64 SQUARE
0.450
11.42
GENERAL TOLERANCE
:
±
.010 inch
±
0.25 mm
3-5
CTS Electrocomponents
© 2013 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
6/13/13
TYPE 291C-S
.218±.002
5.53 ± 0.05
2-Bit Encoder With Schmitt Trigger, with Cable and Connector
.250 ±0.002
6.35 ±0.05
.520
13.20 CENT.
12.40 CENT.
.154 ±0.002
3.90 ±0.05
.250
6.35
.488
.066 ±0.002
1.68 ±0.05
.250
6.35
.541
13.75
3/8-32 UNEF-2A
THREADS
L
±
.014
±
0.35
B
.144
3.65
.291
7.40
.218 ±0.002
5.53 ±0.05
CONNECTOR IS AMP
P/N215083-6
OR EQUIVALENT
6 5 4
3
2
1
.417
10.58
GENERAL TOLERANCE
:
±
.010 inch
±
0.25 mm
CABLE LENGTH
See Termination Options
ELECTRIC CIRCUIT AND WAVEFORM
( WITHOUT SCHMITT TRIGGER DESIGN )
PIN#
POWER
CHANNEL A
R
*
R
*
Standard Quadrature 2-Bit Code
8 PPR/ 32 DETENTS
CW
6
5
4
3
2
1
CHANNEL B
HIGH
CHANNEL A
1 PULSE
CHANNEL B
SWITCH TERMINAL
SWITCH TERMINAL
LOW
HIGH
LOW
1
2
3
4
5
6
Nominal Detent Position
POSITION NUMBER
GROUND
* Require pull-up resistors (2.2K or 4.7K
Ω)
for application circuit
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
ELECTRIC CIRCUIT AND WAVEFORM
( WITH SCHMITT TRIGGER DESIGN )
PIN #
Standard Quadrature 2-Bit Code
8 PPR/ 32 DETENTS
CW
POWER
CHANNEL A
CHANNEL B
6
4.7KΩ
5
4.7KΩ
1 PULSE
CHANNEL A
HIGH
4
SWITCH TERMINAL
3
LOW
CHANNEL B
Nominal Detent Position
HIGH
LOW
SWITCH TERMINAL
2
GROUND
1
1
2
3
4
5
6
POSITION NUMBER
* Schmitt triggers and pull-up resistors (4.7KΩ) are integrated inside
CTS optical encoder, so it’s not necessary to have external pull-up
resistors for application circuit.
* It can work well if application circuit still adopts external pull-up resistors (2.2KΩ).
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
4-5
CTS Electrocomponents
© 2013 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
6/13/13
Shaft Trim
”z”
”
x
”
”
x
” ”
Y
”
R - ROUND
Imperial Shaft
Metric Shaft
X
.250”
6.35
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
S
V1
- .050” Pitch Center Pins Formed to Rear
with .144 length
P1
- .10” Pitch Center Pins Formed to Rear
with .236 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
SWITCH
A
- NONE
B
- MOMENTARY
SCHMITT TRIGGER
S
- WITH SCHMITT TRIGGER
BLANK
- WITHOUT
"L" SHAFT LENGTH
mm
A5
- 15mm
B0
- 20mm
B5
- 25mm
C0
- 30mm
inch
20
- .625"
22
- .688"
24
- .750"
28
- .875"
32
- 1.000"
OUTPUT COMBINATION
832
624
800
600
- 8PPR, 32-DETENTS
- 6PPR, 24-DETENTS
- 8PPR, NO DETENTS
- 6PPR, NO DETENTS
ALL
ALL
6.35mm Dia. .250" Dia.
"B"
BUSHING LENGTH
mm
D
- 9.53mm
inch
2
- .250”
3
- .375”
0
- .312”
3/8-32 UNEF-2A
M9X.75P
Note:
Consult CTS for other common standard
features not listed.
5-5
CTS Electrocomponents
© 2013 CTS Corporation. All rights reserved. Information subject to change.
www.ctscorp.com
6/13/13
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