Series 291
Precision, Long-life 12mm Optical Encoder
▪ Available with 4, 6, 8, 24,32, 64 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
291
V1
2022124
Code
V1
P1
*C4
*C5
*C6
Bushing
Length
Shaft
Length
0
1
22
2
Termination
.050” pitch pins
Rear facing
.132” length(not for 64 PPR)
.10” pitch pins
Rear facing
.236” length
4” ribbon cable
With .050” pitch
connector terminals (not
for 64 PPR)
5” ribbon cable
With .050” pitch
connector terminals (not
for 64 PPR)
6” ribbon cable
With .050” pitch
connector terminals (not
for 64 PPR)
Shaft
Output
Operating
Trim C Combination Voltage
1
Code
F
E
Shaft Length “L”
Single shaft structure
22 .687”
24 .875”
Dual shaft structure
DD Outer shaft: .685”
Inner shaft: 1.059”
(Not available with locating
lug, 32 and 64 PPR, see page
8 for additional details)
832
S
Code
0
D
Bushing Length “B”
.312” For single shaft construction
.256” For dual shaft construction
(not for 32, 64 PPR)
2017-07-24 Rev. D
A
Spec.
A
S
Slotted
B
Combination
832
624
416
5 positions
800
600
400
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
(only available with
Schmitt trigger)
24 PPR, 24 Detents
(only available with
Schmitt trigger)
32 PPR, No Detents
(only available with
Schmitt trigger)
64 PPR, No Detents
(only available with
Schmitt trigger)
X00
X24
Z00
A
RTTT T
T T
T
TTT
Spec. T
None T
Momentary
TSS
(not for 64 PPR)
Code
Flat
Output
Schmitt Trigger
& Locating Lug
B
F
Y00
Code
Switch
Code
Spec.
Without Schmitt trigger,
With locating lug (not for
32, 64 PPR)
Without Schmitt trigger,
Without locating lug (not
for 32, 64 PPR)
With Schmitt trigger,
Without locating lug
With Schmitt trigger,
With locating lug
BLANK
A
S
B
Code
A
B
Spec.
5.0V
3.3V (not for
64 PPR)
Note: * Cable connector for C4, C5, C6 is AMP P/N 215083-6 or Equivalent
www.ctscorp.com
Page 1 of 13
©2017 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
Encoder Function
Parameter
Conditions &
Remarks
Min
Voltage (4, 6, 8, 24, 32 PPR)
Voltage (64 PPR)
Output Code
Sink Current
Power Consumption
Resolution
2-Bit Quadrature
Channel A leads
Channel B by 90°
during clockwise
rotation
5.0 VDC
3.3 VDC
5.0 VDC
3.3 VDC
Nominal
Max
Unit
4.75
3.175
5.0
3.3
5.25
3.425
VDC
4.5
5.0
5.5
VDC
150
80
mW
mW
Pulses per
Revolution
2.0mA
1.0mA
4, 6, 8, 24, 32, 64
Mechanical and Environmental
Manual Soldering
RoHS
Shock :
Vibration :
IP Rating (4, 6, 8, 24, 32 PPR):
IP Rating (64 PPR):
Packaging :
Operating Temperature:
Storage Temperature:
Storage Temperature:
(32, 64 PPR)
Rotational Life
Push-Pull Strength of Shaft
(4,6,8,24, 32 PPR)
(64 PPR)
Terminal Pull-out Strength
Rotational Torque
(4, 6, 8, 24 PPR)
(32 PPR)
(64 PPR)
Rotational Torque
Detent Options
2017-07-24 Rev. D
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)
IP 50
IP 40
Standard anti-static tray packaging
-40°C to +85°C
-55°C to +100°C
-40°C to +100°C
No detent @ 30 RPM
With detent @ 30 RPM
10 seconds
10 seconds
10 seconds
3 Million Cycles
1 Million Cycles
20 kg
13.6 kg
6 kg
Running
Running
Running
24 Detents
16, 32 Detents
0, 16, 24, 32
10 to 30 gf-cm
30 gf-cm Max.
100 gf-cm Max.
90 to 190 gf-cm
50 to 150 gf-cm
www.ctscorp.com
Page 2 of 13
©2017 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
Conditions & Remarks
Min.
Nominal
Switch contact resistance
Switch rating
Max
Unit
10
ohms
5 VDC @10 mA
Switch travel
0.25
0.5
0.75
mm
Actuation Force
400
510
620
grams
Switch Life
Standard
1 Million
Actuations
Consult CTS for custom life requirements
Switch Life
Mechanical Specifications
Figure 1 – 291V1… – Without Schmitt Trigger, With Left Locating Lug, .050” Pitch Pins Facing Rear
2017-07-24 Rev. D
www.ctscorp.com
Page 3 of 13
©2017 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
2017-07-24 Rev. D
www.ctscorp.com
Page 4 of 13
©2017 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
2017-07-24 Rev. D
www.ctscorp.com
Page 5 of 13
©2017 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 4 – 291V1…B – With Schmitt Trigger, With Locating Lug, .050” Pitch Pins Facing Rear
2017-07-24 Rev. D
www.ctscorp.com
Page 6 of 13
©2017 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 5 – 291P1…A – Without Schmitt Trigger, Without Locating Lug, .100” Pitch Pins Facing Rear
291P1…S – With Schmitt Trigger, Without Locating Lug, .100” Pitch Pins Facing Rear
2017-07-24 Rev. D
www.ctscorp.com
Page 7 of 13
©2017 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 6 –291P1… – Without Schmitt Trigger, With Locating Lug, .100” Pitch Pins Facing Rear
291P1…B – With Schmitt Trigger, With Locating Lug, .100” Pitch Pins Facing Rear
2017-07-24 Rev. D
www.ctscorp.com
Page 8 of 13
©2017 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 7 –291C… – Without Schmitt Trigger, With Locating Lug, With Ribbon Cable
291C…B – With Schmitt Trigger, With Locating Lug, With Ribbon Cable
2017-07-24 Rev. D
www.ctscorp.com
Page 9 of 13
©2017 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 8 – 291C…A – Without Schmitt Trigger, Without Locating Lug, With Ribbon Cable
291C…S – With Schmitt Trigger, Without Locating Lug, With Ribbon Cable
2017-07-24 Rev. D
www.ctscorp.com
Page 10 of 13
©2017 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 9 – 291P1…Z00AA – 64 PPR, With Schmitt Trigger, With Locating Lug, .100” Pitch Pins Facing
Rear, Without Momentary Switch
4, 6, 8, 24 PPR
2017-07-24 Rev. D
www.ctscorp.com
Page 11 of 13
©2017 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
4, 6, 8, 24, 32 PPR
64 PPR
2017-07-24 Rev. D
www.ctscorp.com
Page 12 of 13
©2017 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
2017-07-24 Rev. D
www.ctscorp.com
Page 13 of 13
©2017 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.
