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EC35 Optical Commutation Kit Encoder

EC35 Features

  • Now 500 to 60,000 CPR
  • Quick, simple assembly
  • A/B/Z differential outputs
  • U/V/W commutation outputs (differential or open-collector)
  • 2,000 to 240,000 quadrature states per rev.
  • Frequency response from DC up to 1 MHz
  • Fits shaft diameters from 0.197 in. (5mm) to 0.375 in. (3/8 in.)
  • Single 5V supply

See more info below

Configure the EC35

EC35 Product Description

Restriction of Hazardous Substances

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

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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