Anaheim Encoder ENCM15I Modular Differential Encoder Spec Sheet

							FEATURES
910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
DESCRIPTION
The M15 high-resolution, Magnetic Incremental Encoder with Index offers reliable performance at an 
economical price. This modular unit comes in a large range of resolutions with multiple po\
le 
commutations and reference pulse options. This magnetic encoder can handle shaft sizes that range from 
.125” to .393”. The patented EMI circuitry provides protection from high-frequency, electrical noise, and 
background magnetic fields. This low-profile design is perfect for stepper motor positioning and anti-stall 
feedback, DC brush-type motor positioning, brushless DC, and servo motor control using the commutation 
options. The M15 comes enclosed in a rugged IP40 package for protection from debr\
is.
L010769
CUSTOM ORDER LAYOUT
ENC-M15I - High Resolution Modular
Encoder With Index ENC-M15I - High Resolution Modular
Encoder With Index
ENC-M15I-100-0-125-OC-CON-H
CPR
100500
125 512
128 640
160 800
200 1000
250 1024
256 1280
320 2000
400 2048
Hub
1250.125 in
187 0.1875 in
5mm 5mm
6mm 6mm
250 0.250 in
312 0.3125 in
8mm 8mm
375 0.375 in
10mm 10mm
Electrical
OCOpen 
Collector
LD Line Driver
Cover
H Cover with 
Center Hole
E Cover 
Extension
N None
Termination
CON 15 Pin Connector
18CBL 15 Pin Connector with 18” 
Mating Cable
36CBL 15 Pin Connector with 36” 
Mating Cable
Commutation Poles
0 None
4 4 Pole
6 6 Pole
8 8 Pole
2 12 Pole
• 100 to 2,048 Counts Per Revolution (CPR)
• Tracks 0 to 200,000 Counts Per Second
• Up to 10,000 Pulses Per Revolution (PPR)
• Third Index Channel
• 2-Channel Quadrature Squarewave Output
• Operating Temperatures:
   Open-Collector: -40
° to +125°C
    Line Driver: -40° to +85°C
• Powered From a Single +5VDC Power Supply
• Shock and Vibration Resistant
• High Resistance to Dirt and Debris
• Long Operational Life
• RoHS Compliant 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
Cover OptionsDescription
H H-option provides a cylindrical cover with a  center hole
E E-option provides a cylindrical  cover
N The standard cylindrical cover will be supplied with this 
option
COVER OPTIONS
DIMENISONS
Dimensions are in inches (mm) 
						

							910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
ENCODER PINOUT
Incremental A, B and Index Outputs
TIMING DIAGRAM
U, V, and W Commutation Outputs 
						

							TerminologyDescription
CPR (N): The Number of Cycles Per Revolution
One Shaft Rotation: 360 mechanical degrees, N cycles
One Electrical Degree (
oe): 1/360th of one cycle
One Cycle (C): 360 electrical degrees (
oe). Each cycle 
can be decoded into 1 or 4 codes, 
referred to as X1 or X4 resolution 
mutiplication
Symmetry:  A measure of the relationship between 
(X) and (Y) in electrical degrees, 
nominally 180
oe
Quadrature (Z): The phase lag or lead between 
channels A and B in electrical degrees, 
nominally 90
oe
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
oe)
ELECTRICAL SPECIFICATION
910 East Orangefair Ln.  Anaheim, CA 92801     Tel. (714) 992-6990     Fax. (714) 992-0471     www.anaheimautomation.com
Recommended Operating Conditions
MinMaxUnits
Open-Collector Temperature -40125
oC
Line Driver Temperature -4085
oC
Supply Voltage 4.55.5Volts
Count Frequency -200 kHz
Parameter MaxUnits
Vibration (20 to 2kHz) 3g
Shaft Axial  Play ± 0.01in.
Max Speed 10000RPM
Parameter MaxUnits
Supply Current  
A, B, Index, OC 39
mA
Supply Current  
A, B, Index, LD 65
mA
Supply Current  
A, B, Index, CP, OC 63mA
Supply Current  
A, B, Index, CP, LD 105mA