Anaheim Encoder ENCA5DI Differential Encoder with 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-A5DI is a differential encoder designed for quick and simple assembly to any minimum \
shaft length 0.445” and shaft size ranging from 0.079” to 0.394”\
 in diameter.  The ENC-A5DI 
module is designed to detect the rotary position with a code wheel.  Whe\
n attached to the end 
of a shaft, the encoder provides digital feedback information.  This differential encoder consists 
of a LED source lens and a monolithic detector IC enclosed in a small po\
lymer package.  These 
modules implement phased array detector technology providing superior pe\
rformance and 
tolerances over traditional aperture mask type encoders.  The ENC-A5DI series provides digital 
quadrature differential outputs on all resolutions and are capable of sinking or sourc\
ing 8 mA 
each.  These encoders are powered from a single +5VDC power supply and are RoHS\
 
compliant and REACH certified.
L010727
ENC-A5DI Differential
Encoder with Index Channel
• Accepts +/- 0.010” Axial Shaft Play
• 50 to 5,000 Cycles per Revolution (CPR)
• Tracks 0 to 300,000 Cycles per Second
• 200 to 20,000 Pulses per Revolution (PPR)
• 2-Channel Quadrature Differential Squarewave Outputs
• Third Index Channel
• Operating Temperature of -40° to +100° C
• Powered from a Single +5VDC Power Supply
• RoHS Compliant and REACH Certified
ENC - A5DI - 0050 - 394 - H  - G
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
T  = Transfer Adhesive
Blank = Default
Index
I = Index
(3rd Channel)
Bore Size
079 = 2mm 236 = 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
Cover Options
E = Cover Extension
H = Hole in Cover
Blank = Default
CPR
504001250
96 5002000
100 5122048
192 5402500
200 7204000
250 9004096
256 1000 5000
360 1024 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
DIMENSIONS
Cover Options: Description
E - Option E-Option provides a cylindrical extension cover  for larger shafts.  
The required shaft length is .445” to .750”.  
Note: E-option + R-Option the required shaft length is .570” to 
.875”.
H - Option Shafts 2mm to 1/4”, a .295” diameter hole is supplied. 
Shafts 5/16” to 10mm, a .438” diameter hole is supplied.
Required shaft length > 0.445”
 
Note: H-Option + R-Option the required shaft length is > .570”
Default Option 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
COVER OPTIONS 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
PIN/TIMING DIAGRAMS
DIFFERENTIAL ENCODER PINOUTTOP OF ENCODER FACING PLUG
BASE OPTIONS
Differential Encoder Timing Diagram
Pin #Function
1 Ground
2 Ground
3 I-Channel
4 I+Channel
5 A-Channel
6 A+Channel
7 Power
8 Power
9 B-Channel
10 B+Channel
(Note: Base Mounting Screws are NOT included. #2-56 or #4-40 screws can\
 be used to mount the base to your mounting surface.) 
						

							ELECTRICAL SPECIFICATIONS
910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
ACCESSORIES
Cable Part NumberLength
ENC-CBL-AA4706 1 ft.
ENC-CBL-AA4706-5 5 ft. 
ENC-CBL-AA4706-10 10 ft.
ENC-CBL-AA4706-20 20 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 A5DI 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.
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 -
-
-29
57
73 36
65
88
mA
Output Low  (I
OL = 8mA max)
-0.2 0.4 Volts
Output High*
I
OL = -8mA max     
2.4        
3.4        
-  
Volts
Differential Output Rise/ Fall Time --15 nS
Model # Description
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.
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
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 < 2000 18x10
6 / CPRRPM
CPR ≥ 2000 and < 4000 21.6x10
6 / CPRRPM
CPR ≥ 4000 43.2x10
6 / CPRRPM
*60,000 RPM is the maximum RPM due to mechanical limitations.