EC35 Product Description
The EC35 quick assembly optical commutation encoder is designed for high volume, low cost, OEM motion control applications. The EC35 provides A/B/Z incremental outputs and U/V/W outputs for brushless motor commutation.
The EC35 is designed to be a one-time installation that mounts to the motor using 2 screws on a 1.28" or 1.812" diameter bolt circle. The precision machined encoder hubdisk pushes on when the encoder assembly is put on the motor shaft. This design securely grips the shaft without set screws. A built-in, removable spacer tool ensures that the encoder disk is automatically set to the correct gap when the encoder housing is mounted. The encoder can be "timed" by rotating a ring on the assembly and pressing the ring in with a simple tool to lock everything into place.
The EC35 is powered by a single 5V supply and comes with a 15-pin connector that provides differential outputs for A/B/Z and U/V/W. Open-collector U/V/W outputs are available as an option. The EC35 can obtain single-ended output by only using the + outputs of each differential pair. The internal 26C31 line drivers can source and sink 20 mA at TTL levels. The recommended differential receiver is the industry-standard 26C32. Maximum noise immunity is achieved when the differential receiver is terminated with a 150 Ω resistor in series with a .0047 μF capacitor placed across each differential pair.
Please Note: Due to the EC35's push-on hub design, it is recommended for use as a one-time installation.
Product Specifications
View here or download the specifications
ENVIRONMENTAL
PARAMETER |
PARAMETER |
UNITS |
Operating Temperature |
-20 to 105 |
C |
Electrostatic Discharge, IEC 61000-4-2 |
±12 |
kV |
Vibration (10Hz to 2kHz, sinusoidal) |
20 |
G |
Shock (6 milliseconds, half-sine) |
75 |
G |
MECHANICAL
PARAMETER |
VALUE |
UNITS |
Max. Shaft Axial Play |
±0.003 |
in. |
Max. Shaft Runout |
0.001 T.I.R. |
in. |
Max. Acceleration |
250000 |
rad/sec² |
Maximum RPM, CPR ≤ 2500 e.x. CPR = 2500, max. rpm = 9600
|
((24 x 10^6) / CPR) |
RPM |
Maximum RPM, CPR = 4000 |
12000 |
RPM |
Maximum RPM, CPR = 5000 |
9600 |
RPM |
Maximum RPM, CPR = 10000 |
6000 |
RPM |
Maximum RPM, CPR = 20000 |
3000 |
RPM |
Maximum RPM, CPR = 40000 |
1440 |
RPM |
Maximum RPM, CPR = 60000 |
960 |
RPM |
Codewheel Moment of Inertia |
6.48 x 10-5 |
oz-in-s2 |
Required Shaft Length |
0.500 to 0.565 |
in. |
Mounting Screw Torque |
2-3 |
in-lbs |
Technical Bulletin TB1001 - Shaft and Bore Tolerances |
Download |
ELECTRICAL
SPECIFICATIONS |
MIN. |
TYP. |
MAX. |
UNITS |
NOTES |
Supply Current CPR ≤ 2500 CPR > 2500 |
|
13 37 |
17 44 |
mA |
no output load, max. frequency output |
Supply Voltage |
4.5 |
5.0 |
5.5 |
V |
|
Differential High Level Output |
2.5 |
3.5 |
|
V |
loh = -8 mA |
Differential Low Level Output |
|
|
0.5 |
V |
lol = 8 mA |
Differential Rise/Fall Time |
|
100 |
|
ns |
|
Open collector pullup voltage |
|
|
30 |
V |
lload = 100 mA |
Open collector "on" resistance |
|
0.2 |
|
ohm |
lload = 100 mA |
Frequency Response, CPR ≤ 2,500 |
|
|
400 |
kHz |
|
Frequency Response, CPR = 4,000 & 5000 |
|
|
800 |
kHz |
|
Frequency Response, CPR = 10,000 |
|
|
1 |
MHz |
|
Frequency Response, CPR = 20,000 / 40,000 / 60,000 |
|
|
960 |
kHz |
|
INCREMENTAL OUTPUT TIMING
PARAMETER |
MIN. |
TYP. |
MAX. |
UNITS |
Symmetry, S1, S2 |
108 |
180 |
252 |
elec. deg. |
Quadrature Delay, Q |
45 |
90 |
135 |
elec. deg. |
Index Width, W |
45 |
90 |
135 |
elec. deg. |
A leads B for CCW shaft rotation, and B leads A for CW rotation viewed from the top side of the encoder.
ACCESSORIES
Screws:
Part #: SCREW-256-188-SH
Description: Socket Head Cap, #2-56 UNC x 3/16"
Use: Base Mounting
Quantity Required: 2
Screws are included
Part #: SCREW-M25-5MM-PH
Description: Pan Head, Phillips M2.5 x 0.45 x 5mm
Use: Base Mounting
Quantity Required: 2
Part #: SCREW-M25-5MM-BH
Description: Button Head Cap, M2.5 x 0.45 x 5mm
Use: Base Mounting
Quantity Required: 2
Screws are included
COMMUTATION OUTPUT TIMING
PARAMETER |
MIN. |
TYP. |
MAX. |
UNITS |
State width, 4 pole |
27 |
30 |
33 |
angular deg. |
State width, 6 pole |
17 |
20 |
23 |
angular deg. |
State width, 8 pole |
12 |
15 |
18 |
angular deg. |
State width, 10 pole |
9 |
12 |
15 |
angular deg. |
State width, 12 pole |
7 |
10 |
13 |
angular deg. |
PIN-OUTS
Pin |
"D" Output Option |
"C" Output Option |
"0" pole Option |
1 |
A+ (A Quadrature) |
A+ (A Quadrature) |
A+ (A Quadrature) |
2 |
A- |
A- |
A- |
3 |
B+ (B Quadrature) |
B+ (B Quadrature) |
B+ (B Quadrature) |
4 |
B- |
B- |
B- |
5 |
Z+ (Index) |
Z+ (Index) |
Z+ (Index) |
6 |
Z- |
Z- |
Z- |
7 |
U+ (U Commutation) |
U (Open collector) |
no connection |
8 |
U- |
no connection |
no connection |
9 |
V+ (V Commutation) |
V (Open collector) |
no connection |
10 |
V- |
no connection |
no connection |
11 |
W+ (W Commutation) |
W (Open collector) |
no connection |
12 |
W- |
no connection |
no connection |
13 |
+5V power |
+5V power |
+5V power |
14 |
GND |
GND |
GND |
15 |
no connection |
no connection |
no connection |
Additional Information
Product Notes
-
Cables and connectors are not included and must be ordered separately.
-
US Digital® warrants its products against defects in materials and workmanship for two years. See complete warranty for details.
Datasheets
Assembly Instructions
Press Releases
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