Incremental 25-mm-dia. Rotary Encoder
Compact Encoder with External
Diameter of 25 mm
• Incremental model
• External diameter of 25 mm.
• Resolution of up to 500 ppr.
For the most recent information on models that have been certified for
Be sure to read Safety Precautions on safety standards, refer to your OMRON website.
Encoders [Refer to Dimensions on page 4.]
Power supply voltage Output configuration Output phases Resolution (pulses/rotation) Model
Voltage output 100, 200, 360 E6A2-CWZ3E (resolution) 0.5M
5 to 12 VDC 500 Example: E6A2-CWZ3E 100P/R 0.5M
Phases A, B, and Z 100, 200, 360 E6A2-CWZ3C (resolution) 0.5M
Open-collector output 500 Example: E6A2-CWZ3C 100P/R 0.5M
(NPN output) 100, 200, 360 E6A2-CWZ5C (resolution) 0.5M
12 to 24 VDC 500 Example: E6A2-CWZ5C 100P/R 0.5M
Voltage output 100, 200, 360 E6A2-CW3E (resolution) 0.5M
5 to 12 VDC 500 Example: E6A2-CW3E 100P/R 0.5M
Phases A and B 100, 200, 360 E6A2-CW3C (resolution) 0.5M
Open-collector output 500 Example: E6A2-CW3C 100P/R 0.5M
(NPN output) 100, 200, 360 E6A2-CW5C (resolution) 0.5M
12 to 24 VDC 500 Example: E6A2-CW5C 100P/R 0.5M
10, (20) *, 60, 100, 200, 300, E6A2-CS3E (resolution) 0.5M
Voltage output 360 Example: E6A2-CS3E 10P/R 0.5M
5 to 12 VDC 500
Phase A 10, 20, 60, 100, 200, 300, 360 E6A2-CS3C (resolution) 0.5M
Open-collector output 500 Example: E6A2-CS3C 10P/R 0.5M
(NPN output) 10, 20, 60, 100, 200, 300, 360 E6A2-CS5C (resolution) 0.5M
12 to 24 VDC 500 Example: E6A2-CS5C 10P/R 0.5M
* Only a 2-m cable is available for the 20P/R Model.
Accessories (Order Separately) [Refer to Dimensions on Rotary Encoder Accessories.]
Name Model Remarks
Coupling E69-C04B Provided with the product.
Servo Mounting Bracket E69-1 Provided with the E6A2-CWZ@.
Refer to Accessories for details.
Ratings and Specifications
Model E6A2- E6A2- E6A2- E6A2-CW3E E6A2-CW3C E6A2-CW5C E6A2-CS3E E6A2-CS3C E6A2-CS5C
Item CWZ3E CWZ3C CWZ5C
12 VDC 12 VDC 12 VDC
−10% to −10% to −10% to
Power supply 5 VDC −5% to 12 V +10% 24 VDC 5 VDC −5% to 12 V +10%, 24 VDC 5 VDC −5% to 12 V +10%, 24 VDC
voltage ripple (p-p): 5% max. +15%, ripple ripple (p-p): 5% max. +15%, ripple ripple (p-p): 5% max. +15%, ripple
(p-p): 5% (p-p): 5% (p-p): 5%
max. max. max.
Current 50 mA max. 30 mA max. 30 mA max. 20 mA max. 30 mA max. 20 mA max.
Resolution (pulses/ 100, 200, 360, 500 10, 20, 60, 100, 200, 300, 360, 500
Output phases Phases A, B, and Z Phases A and B Phase A
Output configuration Voltage out- NPN open-collector output Voltage out- NPN open-collector output Voltage out- NPN open-collector output
put put put
Output resis- Output resis- Output resis-
tance: 2 kΩ tance: 2 kΩ tance: 2 kΩ
Output cur- Output cur- Output cur-
rent: 20 mA Applied voltage: 30 VDC rent: 20 mA Applied voltage: 30 VDC rent: 20 mA Applied voltage: 30 VDC
max. max. max. max. max. max.
Output capacity Residual volt- Sink current: 30 mA max. Residual volt- Sink current: 30 mA max. Residual volt- Sink current: 30 mA max.
age: 0.4 V Residual voltage: 0.4 V max. age: 0.4 V Residual voltage: 0.4 V max. age: 0.4 V Residual voltage: 0.4 V max.
max. (at sink current of 30 mA) max. (at sink current of 30 mA) max. (at sink current of 30 mA)
(Output cur- (Output cur- (Output cur-
rent: 20 mA rent: 20 mA rent: 20 mA
max.) max.) max.)
Maximum response 30 kHz
Phase difference Phase difference between phases A and B: 90°±45° ---
Output duty factor --- 50±25%
1.0 μs max. 1.0 μs max. 1.0 μs max.
(Cable 1.0 μs max. (Cable length: (Cable 1.0 μs max. (Cable length: (Cable 1.0 μs max. (Cable length:
Rise and fall times of length: 500 mm, Control output volt- length: 500 mm, Control output volt- length: 500 mm, Control output volt-
output 500 mm, age: 5 V, Load resistance: 500 mm, age: 5 V, Load resistance: 500 mm, age: 5 V, Load resistance:
Sink current: 1 kΩ) Sink current: 1 kΩ) Sink current: 1 kΩ)
10 mA) 10 mA) 10 mA)
Starting torque 1 mN·m max.
Moment of inertia 1 × 10−7 kg·m2 max.
Shaft Radial 10 N
loading Thrust 50 N
Maximum 5,000 r/min
Ambient temperature Operating: −10 to 55°C (with no icing), Storage: −25 to 80°C (with no icing)
Ambient humidity Operating/storage: 35% to 85% (with no condensation)
Insulation resistance 20 MΩ min. (at 500 VDC) between current-carrying parts and case
Dielectric strength 500 VAC, 50/60 Hz for 1 min between current-carrying parts and case
Vibration resistance Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance Destruction: 500m/s2 3 times each in X, Y, and Z directions
Degree of IEC 60529 IP50
Connection method Pre-wired Models (Standard cable length: 500 mm)
Material Case: Aluminum alloy, Main unit: Aluminum, Shaft: SUS420J2, Mounting Bracket: Galvanized iron
Weight Approx. 35 g
Accessories Coupling, Servo Mounting Bracket (provided with the E6A2-CWZ@), Hexagonal wrench, Instruction manual
*1. An inrush current of approximately 9 A will flow for approximately 0.3 ms when the power is turned ON.
*2. The maximum electrical response speed is determined by the resolution and maximum response frequency as follows:
Maximum electrical response speed (rpm) = Maximum response frequency × 60
This means that the E6A2-C Rotary Encoder will not operate electrically if its speed exceeds the maximum electrical response speed.
*3. No protection is provided against water or oil.
I/O Circuit Diagrams
Model/Output Circuits Output mode Connection
( ) E6A2-C@@3C: +5 to 12 V T(100%)
E6A2-C@@5C: +12 to 24V ON
E6A2 OFF 1/2T±1/4T (50%±25%)
Black, white, orange
main Output The ONs in the above timing chart mean that the
circuit 30 VDC (Black: phase A,
30 mA max. White: phase B, output transistor is ON and the OFFs mean that the
Blue Orange: phase Z) output transistor is OFF.
E6A2-CW5C Direction of rotation: CW Direction of rotation: CCW
E6A2-CWZ3C (as viewed from end of shaft) (as viewed from end of shaft)
T(360˚) CW T(360˚) CCW
Brown ON ON
( ) Vcc
E6A2-C@@3C: +5 to 12 V Phase A OFF Phase A OFF
E6A2-C@@5C: +12 to 24V ON ON
E6A2 Black, white, orange Phase B OFF Phase B OFF Color Signal
main Output 1/4±1/8T (90˚±45˚) 1/4±1/8T (90˚±45˚) Brown Vcc
circuit 30 VDC (Black: phase A, Phase Z ON Phase Z ON
30 mA max. White: phase B, OFF OFF Black Phase A
Blue Orange: phase Z)
0V Note: Phase A is 1/4 T ± 1/8 T Note: Phase A is 1/4 T ± 1/8 T White Phase B
faster than phase B. slower than phase B. Orange Phase Z
The ONs in the above timing chart mean that the Blue 0 V (common)
output transistor is ON and the OFFs mean that the
output transistor is OFF. Note: 1. The white and orange wires
of Single Models (E6A2-
E6A2-CW3E CS@@) do not output
E6A2-CWZ3E 0VUQVUUSBOTJTUPS signals (no connection).
Direction of rotation: CW Direction of rotation: CCW 2. The white and orange wires
of Single Models (E6A2-
(as viewed from end of shaft) (as viewed from end of shaft) CS@@) do not output
Brown CW CCW signals (no connection).
Vcc (+5 to 12 V) T(360˚) T(360˚) 3. Voltage Output Models are
Phase A H Phase A H capable of sinking a
2 kΩ L L maximum current of 20 mA.
E6A2 Black, white, orange Phase B H Phase B H
main Output (Black: phase A, L L
circuit White: phase B, H 1/4±1/8T(90˚±45˚) H 1/4±1/8T(90˚±45˚)
Orange: phase Z) Phase Z Phase Z
20 mA Blue 0V L L
max. Note: Phase A is 1/4 T ± 1/8 T Note: Phase A is 1/4 T ± 1/8 T
faster than phase B. slower than phase B.
“H” and “L” in the diagrams are the output voltage
levels of phases A, B, and Z.
Brown Output transistor
Vcc (+5 to 12 V)
2 kΩ T(100%)
E6A2 Black, white, orange H
main Output (Black: phase A, L 1/2T±1/4T (50%±25%)
circuit White: phase B, “H” and “L” in the diagrams are the output voltage
Orange: phase Z)
20 mA Blue 0V levels.
Refer to Warranty and Limitations of Liability.
WARNING Precautions for Correct Use
This product is not designed or rated for ensuring Do not use the Encoder under ambient conditions that exceed the ratings.
safety of persons either directly or indirectly. ● Wiring
Do not use it for such purposes.
Spurious pulses may be generated when power is turned ON and
OFF. Wait at least 0.1 s after turning ON the power to the Encoder
before using the connected device, and stop using the connected
device at least 0.1 s before turning OFF the power to the Encoder.
Also, turn ON the power to the load only after turning ON the power
to the Encoder.
Dimensions Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified.
8 1.5 1.5
Two, M3 holes,
Depth: 4 4 0 dia.
22 dia. 6
12 -00.05 dia. *
18±0.2 10 2 29 5.5
25 dia. (46.5)
* 4-dia. vinyl-insulated round cable with 5 conductors (Conductor cross
section: 0.14 mm2, Insulator diameter: 0.9 mm),
Standard length: 500 mm
Accessories (Order Separately)
Coupling Servo Mounting Bracket
Refer to Accessories for details.
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
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Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
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were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate
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electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
See http://www.omron.com/global/ or contact your Omron representative for published information.
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LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
In the interest of product improvement, specifications are subject to change without notice.
Industrial Automation Company
http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2014 All Right Reserved.
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
E6A2-CS3C 100P/R 0.5M E6A2-CS3C 10P/R 0.5M E6A2CS3C 200P/R 0.5M E6A2-CS3C 200P/R 2M E6A2-CS3C
300P/R 0.5M E6A2-CS3C 360P/R 0.5M E6A2-CS3C 360P/R 2M E6A2-CS3C 500P/R 0.5M E6A2-CS3C 60P/R 0.5M
E6A2-CS3E 100P/R 0.5M E6A2-CS3E 10P/R 0.5M E6A2-CS3E 200P/R 0.5M E6A2-CS3E 300P/R 0.5M E6A2-
CS3E 360P/R 0,5M E6A2-CS3E 60P/R 0.5M E6A2-CS5C 100P/R 0.5M E6A2-CS5C 100P/R 2M E6A2-CS5C 10P/R
0.5M E6A2-CS5C 10P/R 2M E6A2-CS5C 200P/R 0.5M E6A2-CS5C 300P/R 0.5M E6A2-CS5C 360P/R 0.5M E6A2-
CS5C 500P/R 0.5M E6A2-CS5C 60P/R 0.5M E6A2-CS5C 60P/R 2M E6A2-CW3C 100P/R 0.5M E6A2-CW3C 100P/R
2M E6A2-CW3C 200P/R 0.5M E6A2-CW3E-100P/R 0.5M E6A2-CW3E 200P/R 0.5M E6A2-CW5C 100P/R 0.5M
E6A2-CW5C100 P/R 2M E6A2-CW5C 200P/R 0.5M E6A2-CW5C 200P/R 2M E6A2-CWZ3C 100P/R 0.5M E6A2-
CWZ3C 100P/R 2M E6A2-CWZ3C 200P/R 0.5M E6A2-CWZ3E 100P.R 0.5M E6A2-CWZ3E 200P/R 0.5M E6A2-
CWZ5C 360P/R 0.5M E6A2-CW3C 200P/R 2M E6A2-CW5C 500P/R 0.5M E6A2-CWZ5C 500P/R 0.5M E6A2-CS3C
200P/R 0.5M E6A2-CW5C-100P/R 2M E6A2-CS3E 360P/R 2M