Series E12 Incremental Encoders


Series E12 Encoder

 E12 Incremental Encoders
Dynapar Brand Encoder

Quick Specs...

  • Servo or face mount (1.2" diameter)
  • Up to 1024 PPR with optional marker pulse
  • Rugged all-metal housing
  • Shielded cable standard

Buy Online

Printer-friendly Version

Dimensional Diagrams



Overview Industry/Application Specifications Related Info  

Overview / Design Principle:

The E12 encoder is standard Size 12 (1.2" diameter), servo or face-mount, with a rugged metal housing. It includes precision bearings, an O-ring housing seal, and a rugged 1/8" diameter stainless steel shaft.

Series E12 incremental encoders incorporate the latest in micro-electronic packaging, LED light sources, and matched sensors. Outputs are designed to be compatible with most 5V TTL circuits with options for higher voltage 12 and 15 VDC. Shielded cable is standard.

Features and Benefits:

Mechanical / Environmental Features

  • Durable metal housing
  • O-ring housing seal
  • Rugged 1/8" diameter stainless steel shaft
  • Up to 5000 RPM
  • 0 to 70°C operating temperature

Electrical Features

  • Up to 1024 pulses per revolution including an optional marker pulse
  • Higher electronic operating speed up to 100 kHz
  • LED light source and matched sensor
  • Choice of 5, 12, or 15 VDC units

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 E12 ultraminiature incremental optical encoder is packaged for commercial and lighter-duty industrial applications.

Typical Applications:

  • Industrial equipment
  • Assembly machinery
  • Phototypesetters and printers
  • Robotics
  • Medical diagnostic equipment
  • Motor-mounted feedback
  • Computer peripherals
Standard Operating Characteristics
Code: Incremental
Resolution: 100 to 1024 PPR (pulses/revolution)
Format: Two channel quadrature (AB) with optional Index (Z) outputs
Phase Sense: A leads B for CW shaft rotation as viewed from the shaft end of the encoder
Accuracy: ± 3 x (360° ÷ PPR) or ± 2.5 arc-min worst case pulse to any other pulse, whichever is less
Quadrature Phasing: 90° ± 36° electrical
Symmetry: 180° ± 18° electrical
Index: 90° ± 25° electrical (gated with A and B high)
Waveforms: Squarewave with rise and fall times less than 1 microsecond into a load capacitance of 1000 pf

Input Power: 5 VDC ± 5% at 80 mA max.; 12 or 15 VDC ± 10% at 80 mA max.; not including output loads
Outputs: 7272 line driver (or equivalent), 40 mA sink and source
Frequency Response: 100 kHz min.

Mechanical Bearing Life: 16 x 106 revolutions at max. load
Shaft Loading: 1 lb. radial, 1 lb. axial max.
Shaft Speed: 5,000 RPM max.
Starting Torque: Shielded Bearing: 0.08 oz/in max. at 25 °C
Sealed Bearing: 0.2 oz-in max. at 25 °C
Moment of Inertia: 1.13 x 10-5 oz-in-sec2
Weight: 3.0 oz. max.

Operating Temperature: 0 to +70 °C
Storage Temperature: -25 to +70 °C
Humidity: to 98% without condensation
Enclosure Rating: NEMA12/IP54 (dirt tight, splashproof) Optional: NEMA3/IP64 rating available (consult factory)

Electrical Connections
Function (If Used)
Wire Color Code
Signal A
Signal B
Signal Z

Available Specifications:

Related Products & Resources: