Anaheim Encoder ENCA2N SingleEnded Encoder without Index Spec Sheet

							FEATURES
ORDERING INFORMATION
910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990      Fax. (714) 992-0471     www.anaheimautomation.com
DESCRIPTION
The ENC-A2N is single-ended encoder that requires a minimum shaft length\
 of .445” and is compatible with shaft 
sizes ranging from .079” to .394” in diameter. The ENC-A2N provides digital feedback information for motion 
control applications that require position, speed and/or direction contr\
ol. This line of encoders is RoHS and 
REACH Certified. 
Optical Encoder Module Update:
This new transmissive optical encoder module is designed to be an improv\
ed replacement for the Avago HEDS-
9000 series encoder module. This module is designed to detect rotary position when used with a code \
wheel. The 
new module consists of a lensed LED source and a monolithic detector IC \
enclosed in a small polymer package. 
The new module uses phased array detector technology to provide superior\
 performance and greater tolerances 
over traditional aperture mask type encoders. The new module provides digital A & B quadrature outputs with an 
optional third output index channel. Each module is resolution specific and is matched to the resolution of a code 
wheel. All standard resolutions offered by the HEDS-9000 series encoder module, as well as additional 
resolutions, are now supported by the new module. The new module operates with a single 5V supply and 
provides single ended outputs which are capable of both sinking and sour\
cing 8mA at TTL levels. An internal 
0.1 uF decoupling capacitor is designed into the new module to provide e\
nhanced noise immunity over the 
HEDS-9000 series encoder modules. Physically, the new module has no external wire loops which can interfere 
when mounting. The connector pins are 0.051” shorter than HEDS modules, while still \
providing .30” insertion 
depth.
L010723
ENC-A2N Single-Ended
Encoder without Index Channel
• 32 to 1,250 Cycles Per Revolution (CPR)
• Tracks 0 to 300,000 Cycles Per Second
• 128 to 5,000 Pulses Per Revolution (PPR)
• 2-Channel Quadrature TTL Squarewave Outputs
• Operating Temperature of -40° to +100° C
• Powered from a Single +5VDC Power Supply
• Allows for +/- .010” Axial Shaft Play
ENC - A2N - 0050 - 394 - H  - G
Cover Options
E = Cover Extension
H = Hole in Cover
Blank = Default
Base Options
3 = Base Mounting Holes Become 0.125”
A = Adds Self-Aligning Shoulder to Base
G = Adds 1.812” Mounting Ears to Base
R = Adds 3-Slot Adapter to Bottom of Base
Blank = Default
Bore Size
079 = 2mm236 = 6mm
118 = 3mm 250 = 1/4”
125 = 1/8” 276 = 7mm
156 = 5/32” 313 = 5/16”
157 = 4mm 315 = 8mm
188 = 3/16” 375 = 3/8”
197 = 5mm 394 = 10mm
CPR
003202500540
0050 02560720
0096 03600900
0100 04001000
0192 05001024
0200 05121250 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
DIMENSIONS
COVER OPTIONS
Cover Options: Description
E - Option E-Option provides a cylindrical extension cover  for larger shafts.  The  
required shaft length is .445” to .795”.  
Note: E-option + R-Option the required shaft length is .570” to .920”.
H - Option Shaft < .375 - a .375” diameter hole is used
Shaft ≥ .375” or larger - a .500” diameter hole is used 
Minimum Shaft Length: greater than .445”           
 
Note: H-Option + R-Option the required shaft length is  > .570”      
Default The required length is .445” to .570”
Note: Default Option + R-Option the required shaft length is .570” to 
.695”
Note: Dimensions are in inches 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
BASE OPTIONS
PIN/TIMING DIAGRAMS
SINGLE-ENDED ENCODER PINOUTTOP OF ENCODER FACING PLUG
Pin #Function
1 Ground
2 No Connection
3 Channel A
4 +5VDC Input
5 Channel B
Timing Characteristics SymbolMinTy p Max Units
Cycle Error C-3.0 5.5 °e
Symmetry X,Y150180 210 °e
Quadrature Z6090120 °e
Index Pulse Width Po6090120 °e
Ch. I Rise After Ch. B or Ch. A Fall t110100 250 ns
Ch. I Fall After Ch. B or Ch. A Rise t270150 300 ns
(Note: Base Mounting Screws are NOT included. #2-56 or #4-40 screws can\
 be used to mount the base to your mounting surface.) 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
ELECTRICAL SPECIFICATIONS
ACCESSORIES
Cable Part Number Length
ENC-CBL-AA4175 1 ft.
ENC-CBL-AA4175-02 2 ft. 
ENC-CBL-AA4175-05 5 ft.
ENC-CBL-AA4175-10 10 ft.
Cables:
Bore Size
079=2mm 236=6mm
118=3mm 250=1/4”
125=1/8” 276=7mm
157=4mm 313=5/15”
188=3/16” 375=3/8”
197=5mm 394=10mm
Centering Tools:
ENC-CTOOL - 250
The following cables are compatible with Anaheim 
Automation’s A2N series encoder. Select a cable 
length from the table below:  Centering tools are optional, but recommended for a 
more precise installation. 
NOTE: For pricing and other information on cables 
and centering tools, please visit Accessories on our 
website.
Terminology Definition
CPR(N): The Number of Cycles Per Revolution
One Shaft Rotation: 360 mechanical degrees, N cycles
One Electrical Degree (°e): 1/360th of one cycle
One Cycle (C): 360 electrical degrees (°e). Each cycle can 
be decoded into 1 or 4 codes, referred to 
as X1 or X4 resolution multiplication
Symmetry: A measure of the relationship between (X) 
and (Y) in electrical degrees, nominally 
180 °e
Quadrature (Z): The phase lag or lead between channels A 
and B in electrical degrees, nominally 90 °e
Index (CH I): The index output goes high once per 
revolution, coincident with the low states 
of channels A and B, nominally 1/4 of one 
cycle (90 °e)
Parameter
MaxUnits
Vibration (5 to 2kHz) 20g
Shaft Axial  Play +/- 0.01in.
Shaft Eccentricity Plus Radial Play 0.004in.
Acceleration 250,000rad/sec
2
* Unloaded high level output voltage is 4.80V typically, 4.2V minimum.
Recommended Operating 
Conditions Min
Max Units
Temperature (CPR < 2000) -40100 °C
Temperature (CPR ≥ 2000) -25100 °C
Load Capacitance -100 pF
Count Frequency (CPR ≤ 1250) -
300 kHz
Count Frequency
(CPR 2000-2500) -
360 kHz
Count Frequency (CPR 4000+) -720 kHz
Speed Calculation Units
CPR ≤ 1250  18x10
6 / CPRRPM
CPR 2000-2500 21.6x10
6 / CPRRPM
CPR 4000+ 43.2x10
6 / CPRRPM
*60,000 RPM is the maximum RPM due to mechanical limitations.
Parameter MinTy pMax Units
Supply Voltage 4.55.05.5 Volts
Supply Current
CPR < 500, no load
CPR ≥ 500 and < 2000, no load
CPR ≥ 2000, no load -
-
-
27
55
72 30
57
85 mA
mA
mA
Low-Level Output
I
OL = 8mA max (CPR < 2000)
I
OL = 5mA max (CPR ≥ 2000)
no load (CPR  ≥ 2000) -
-
--
-
0.25 0.5
0.5
- V
V
V
High-Level Output
I
OL = 8mA max (CPR < 2000)
I
OL = 5mA max (CPR ≥ 2000)
no load (CPR  < 2000)
no load (CPR  ≥ 2000) 2.0
2.0
-
- -
-
4.8
3.5 -
-
-
-V
V
V
V
Output Current Per Channel 
(CPR < 2000) -8.0
-8.0 mA
Output Current Per Channel 
(CPR ≥ 2000) -5
-5 mA
Output Rise Time (CPR < 2000) -11 0 -nS
Output Rise Time (CPR ≥ 2000) -50 -nS
Output Fall Time (CPR < 2000) -100 -nS
Output Fall Time (CPR ≥ 2000) -50 -nS