Series EC23 Shaft Encoders


Series EC23 Encoders

 EC23 Shaft Encoders
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Quick Specs...

  • Compact Size 23 encoder
  • Up to 10,000 PPR with optional marker pulse
  • Economical high performance

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Overview Industry/Application Specifications Related Info  

Overview / Design Principle:

A pre-wired cable or terminal screw connections are included with either servo clip or face mounting options.

Its bidirectional and optional marker pulse, current sink or differential line driver outputs are compatible with most electronic counters, instruments, PLC’s, robot controls, CNC’s, and industrial computers. The EC23 encoder is mechanically interchangeable with the all popular Size 23 encoders.

Features and Benefits:

Mechanical / Environmental Features

  • 1/4" stainless steel shaft
  • Low inertia, low starting torque
  • Up to 10,000 RPM
  • 0 to 70°C operating range
  • Outline dimensions: 2.3" Dia. x 1.65" L.

Electrical Features

  • Shielded cable or terminal screw options
  • 3,000 to 5,000 pulses per revolution
  • Bidirectional outputs and gated marker available
  • 250 kHz frequency response
  • 5-26 VDC supply voltage
  • Single LED light source

The Dynapar Advantage:

  • Innovative, high quality leading edge technology encoder products
  • Broad commercial - industrial grade product line
  • Fast 3 Day Delivery and customized built to order solutions available
  • Global Manufacturing & Service Support
  • Fast-Friendly Customer Service & Technical Support with Multi-Lingual Capabilities
  • Global Network of Authorized Resellers
  • Competitive Product Warranty:  2 Years  


The Series EC23 encoder is a high resolution, optical incremental encoder designed for light industrial and commercial applications. A standard Size 23 (2.3" dia.), the EC23 encoder is ideal for machine and equipment designs with limited space and high performance requirements.

Typical Applications:

  • Motor-mounted feedback for servo systems
  • Assembly machines
  • Robotics and material handling
  • Printers, X/Y plotters, and phototypesetters
  • Semiconductor I.C. bonders
  • Medical diagnostic equipment (X-ray & CAT scanners)
  • Position and/or velocity input for CNC’s, PLC’s, motion controllers, etc.
Standard Operating Characteristics
Code: Incremental
Resolution: 3000 to 5000 PPR (pulses/revolution)
Accuracy: (Worst case any edge to any other edge) ±10.8°/PPR
Format: Two channel quadrature (AB) with optional Index (Z) and complementary outputs
Phase Sense: A leads B for CW or CCW shaft rotation as viewed from the shaft end of the encoder, see Ordering Information
Quadrature Phasing: 90° ± 25° electrical
Symmetry: 180° ± 25° electrical
Index: 90° ± 25° electrical, gated with B
Waveforms: Squarewave with rise and fall times less than 1 microsecond into a load capacitance of 1000 pf

Input Power: 4.5 min. to 26 VDC max. at 80 mA max., not including output loads
Outputs: 7273 Open Collector: 30 VDC max., 40 mA sink max.
7272 Push-Pull and Differential Line Driver: 40 mA sink or source
Frequency Response: 250 kHz min.
Electrical Protection: Overvoltage, reverse voltage and output short circuit protected
Noise Immunity: Tested to EN50082-2 (Heavy Industrial) for Electro Static Discharge, Radio Frequency Interference, Electrical Fast Transients, Conducted and Magnetic Interference
Cable: PVC jacket, 105 °C rated, overall foil shield; 3 twisted pairs 26 AWG (output signals), plus 2 twisted pairs 24 AWG (input power)

Bearing Life: 1 x 109 revolutions at max. load
Shaft Loading: 5 lbs. max. radial and axial
Shaft Runout: 0.001" max. TIR
Shaft Speed: 10,000 RPM max.
Shaft Tolerance: Nominal -0.0004"/-0.0007"
Starting Torque: Shielded bearings: 0.1 oz-in max.;
Sealed bearings: 0.2 oz-in max.
Moment of Inertia: 2.83 x 10-4 oz-in-sec2
Weight: 13 oz. max.

Operating Temperature: Standard: 0 to +70 °C
Storage Temperature: -40 to +90 °C
Shock: 50 G's for 11 msec duration
Vibration: 5 to 2000 Hz at 20 G's
Humidity: to 98% without condensation
Enclosure Rating: NEMA12/IP54 (dirt tight, splashproof)

Electrical Connections
Note: Wire color codes are referenced here for models that are specified with pre-wired cable.
Single Ended
Term. Function (If Used) Wire Color Code
A Signal A BRN
B Signal B ORN
C Signal Z YEL
D Power Source RED
E No Connection
F Common BLK
G Case GRN
Term. Function (If Used) Wire Color Code
A Signal A BRN
B Signal B ORN
C Signal Z YEL
D Power Source RED
E No Connection
F Common BLK
G Case GRN
H Signal ¯A BRN/WH
I Signal ¯B ORN/WH
J Signal ¯Z YEL/WH

Available Specifications:

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