Dynapar - Rotary Feedback products. Innovation, Customization, Delivery.

Innovation, Customization, Delivery

Dynapar encompasses the broadest line of trusted brands in motion feedback control, including Dynapar encoders and Hengstler brand incremental encoders and absolute rotary encoders, Northstar heavy-duty magneto-resistive and Heavy-Duty optical encoders and high-performance Harowe brand resolvers. Only Dynapar feedback solutions offer these world-class rotary feedback brands from one Global Supplier with 3 day delivery on most models for customer peace of mind.

Joliet Technologies is the preferred Dynapar Integrator for the Chicagoland area.

Series X25 Incremental EncodersSeries X25 Incremental Encoders

Quick Specs…

  • Heavy duty industrial enclosure with 1/2″ diameter conduit entry
  • Up to 5000 PPR with optional marker
  • Approved for National Electrical Code (NEC) Class 1 & 2, Divisions 1 & 2, Groups C,D,E,F,G

Overview / Design Principle:

Electrical outputs are electronically compatible with almost all drives and PLC’s. Differential line driver outputs are available for long cable runs (hundreds of feet) and higher noise immunity.

Series X25 encoders are designed for use in environments stated in: UL Class I, Group C: atmospheres such as ethyl ether and ethylene; UL Class I, Group D: atmospheres such as acetone, ammonia, benzene, butane, cyclopropane, ethanol, gasoline, hexane, methanol, methane, natural gas, naphtha, and propane; Class II, Groups E, F & G: combustible metal dusts, including aluminum, magnesium, and their commercial alloys, and atmospheres containing combustible carbonaceous dusts, including carbon black, charcoal, coal, or coke dusts, and combustible dusts including flour, grain, wood, plastic, and chemicals.

Classifications of hazardous locations are subject to the approval of the authority having jurisdiction. Refer to Article 500 of the National Electrical Code (NEC).

Features and Benefits:

Mechanical / Environmental Features

  • Large stainless steel shaft (1/4″ or 3/8″) and shaft seal
  • Heavy-duty cast aluminum housing, and an O-ring seal
  • Heavy-duty ABEC precision bearings standard
  • Up to 5000 RPM slew speed

Electrical Features

  • Noise immune to ESD, RFI and electrical transients
  • High current outputs
  • Over-Voltage protection
  • Reverse Voltage protection
  • Output Short-Circuit Protection

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


These rugged, high-performance, incremental optical encoders are suitable for hazardous locations feature environmentally sealed, cast aluminum housings with 4-inch square flange mounting, and 1/2″ conduit entry. A stainless steel shaft and a clear anodized housing provide corrosion resistance.


Standard Operating Characteristics

Code: Incremental
Resolution: 1 to 5000 PPR (pulses/revolution)
Accuracy: (Worst case any edge to any other edge) = 1024 PPR (metal disk): ± 7.5 arc-min. > 1024 PPR (glass disk): ± 2.5 arc-min.
Format: Two channel quadrature (AB) with optional Index (Z) and complementary outputs
Phase Sense: A leads B for CCW shaft rotation as viewed from the shaft end of the encoder
Quadrature Phasing: 90° ± 25° electrical
Symmetry: 90° ± 25° electrical
Index: 2540 PPR and below: 180° ± 25° electrical; Greater than 2540 PPR: 90° ± 25° electrical
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: 100 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


Shaft Loading: 40 lbs. radial, 40 lbs. axial
Shaft Speed: 5,000 RPM max.
Shaft Runout: 0.001″ max. TIR
Starting Torque: (max at 25° C) 2.0 oz.-in
Moment of Inertia: 9.0 x 10-4 oz-in-sec2


Operating Temperature: 0 to +70° C;
Storage Temperature: -40 to +90° C
Shock: 50 G’s for 11 milliseconds duration
Vibration: 5 to 2000 Hz at 2 G’s
Humidity: to 98% without condensation
Weight: 4.5 lbs. (2.0 kg)
Enclosure Rating: NEMA4X/IP56 (dust proof, washdown)

Available Specifications:

Related Products & Resources:

For additional information or to receive a full-line catalog, contact your Dynapar representative at 1.800.873.8731 or visit their web site at: www.dynapar.com
Headquarters:1675 Delany Road • Gurnee, IL 60031-1282 • USA
Phone: 1.847.662.2666
Fax: 1.847.662.6633
Email: custserv@dynapar.com or dynapar.techsupport@dynapar.com
© 2009 Dynapar Corp. Printed in U.S.A. • Feedback Quick Reference Guide P/N# N-FLB130 (11/09) 5M

Call Joliet Technologies TODAY 

If you have any questions concerning Dynapar products, feel free to contact us:
Phone (815) 725-9696,
Toll Free (866) 492-9888,
Fax (815) 725-9393 or
E-mail info@joliettech.com

Joliet Technologies custom packages, integrates and engineers AC Variable Frequency Drives (VFD), DC Variable Speed Drives (VSD) and AC Drive Controllers using top of the line manufacturers, like ABB, Emerson-Control Techniques, Siemens and Saftronics (Fincor). Our custom drive packages are built to your specifications for your application. We specialize in large horsepower drive systems (500Hp and above). Call us at (815) 725-9696 or fax us at (815) 725-9393 or e-mail us or fill out an RFQ with your requirements. Serving the greater Chicagoland area and the World.