Series 291
Precision, Long‐life 12mm Optical Encoder
Available with 4, 6, 8, 24 Pulses per Revolution
Optional Momentary Switch
Multiple options for terminations, resolution,
cable lengths, and operating voltage
Description
The 291 Series allows versatility in design applications by providing highly reliable,
precise digital output and long rotational life with our non‐contacting design. This product provides flexibility
in resolution, power consumption, and operating temperatures. The options of Schmitt trigger, detents,
momentary switch, shaft & bushing length, dual shaft, termination styles, torque, operating voltage, and IP
ratings provide flexibility to meet your exacting design requirements.
Ordering Information
Series
Termination
Bushing Shaft Shaft Output Operating Switch Schmitt Trigger
Length Length Trim
Combination Voltage &Locating Lug
291 V1 0 22 F 832
A B A
Code
Termination
Code Shaft Length “L”
Single shaft structure
22 .687”
Dual shaft structure
DD Outer shaft: .685”
Inner shaft: 1.059”
(Not available with locating
lug, see page 8 for additional
details)
.050” pitch pins
V1
Rear facing
.132” length
.10” pitch pins
P1
Rear facing
.236” length
4” ribbon cable
*C4
With .050” pitch
connector terminals
5” ribbon cable
*C5
With .050” pitch
connector terminals
6” ribbon cable
*C6
With .050” pitch
connector terminals
Code
Spec.
Code
F
Spec.
Flat
A
B
None
Momentary
Output
832
624
416
800
600
400
Combination
Code
A
Spec.
Code
Bushing Length “B”
0
.312” For single shaft construction
D
.256” For dual shaft construction
8 PPR, 32 Detents
6 PPR, 24 Detents
4 PPR, 16 Detents
8 PPR, No Detents
6 PPR, No Detents
4 PPR, No Detents
24 PPR, No Detents
X00
(only available with
Schmitt trigger)
24 PPR, 24 Detents
X24
(only available with
Schmitt trigger)
Without Schmitt trigger,
Without locating lug
Without Schmitt trigger,
BLANK
With locating lug
With Schmitt trigger,
S
Without locating lug
With Schmitt trigger,
B
With locating lug
Code
Spec.
A
5.0V
B
3.3V
Note: * Cable connector is AMP P/N 215083‐6 or Equivalent
2016‐06‐08 Rev. A
www.ctscorp.com
Page 1 of 11
©2016 CTS® Corporation.
Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Series 291
Compact Optical Encoder
Electrical Specifications
Parameter
Operating Temperature
Range
Conditions &
Remarks
4.75
5.0
3.3
3.175
2‐Bit Quadrature
Channel A leads
Channel B by 90°
during clockwise
rotation
5.0 Vdc
2.0mA
3.3 Vdc
1.0mA
5.0 Vdc
3.3 Vdc
Running
10
20
24 Detents 90
140
16,32
50 100
Detents
0, 16, 24, 32
4, 6, 8, 24
20
6
Min
Nominal
Max
+85
5.25
3.425
V
DC
Unit
°C
‐40 50
Encoder Function
Voltage
Output Code
Sink Current
Power Consumption
Rotational Torque
Rotational Torque
Rotational Torque
Detent Options
Resolution
Rotational Life
150
80
30
190
150
3 Million
1 Million
mW
mW
gf‐cm
gf‐cm
gf‐cm
Pulses per
Revolution
cycles
cycles
kg
kg
No detent
@30 RPM
With detent
Rotational Life
@30 RPM
Push‐Pull Strength of Shaft
10 seconds
Terminal Pull‐out Strength
10 seconds
Mechanical and Environmental
Manual Soldering
RoHS
Shock :
Vibration :
Packaging :
Storage Temperature:
Maximum temperature of 350°C for 5 seconds
Lead‐Free. Fully compliant to RoHS Directive
Per MIL‐STD‐883F ( 100G’s)
Per MIL‐STD‐883F ( 15G’s)
Standard anti‐static tray packaging
‐55°C to +100°C
2016‐06‐08 Rev. A
www.ctscorp.com
Page 2 of 11
©2016 CTS® Corporation.
Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Series 291
Compact Optical Encoder
Optional Momentary Switch Function:
Parameter
Switch contact resistance
Conditions & Remarks
Min.
Nominal Max Unit
10 ohms
0.25 0.5 0.75 mm
400 510 620 grams
1 Million actuations
Consult CTS for custom life requirements
Switch rating
5 VDC @10 mA
Switch travel
Actuation Force
Switch Life
Switch Life
Standard
Mechanical Specifications
Figure 1 – 291V1… – Without Schmitt Trigger, With Left Locating Lug, .050” Pitch Pins Facing Rear
2016‐06‐08 Rev. A
www.ctscorp.com
Page 3 of 11
©2016 CTS® Corporation.
Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Series 291
Compact Optical Encoder
Figure 2 – 291V1…S – With Schmitt Trigger, Without Locating Lug, .050” Pitch Pins Facing Rear
2016‐06‐08 Rev. A
www.ctscorp.com
Page 4 of 11
©2016 CTS® Corporation.
Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Series 291
Compact Optical Encoder
Figure 3 – 291V1…A – Without Schmitt Trigger, Without Locating Lug, .050” Pitch Pins Facing Rear
2016‐06‐08 Rev. A
www.ctscorp.com
Page 5 of 11
©2016 CTS® Corporation.
Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
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