As of March 26, 2010 Joliet Technologies is no longer representing the Avtron line of products.

We do however represent the Dynapar line of Rotary Feedback Products.

Avtron – Adjustable Speed Drives and Drive Systems

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

Adjustable Speed Drives and Drive Systems


Avtron Frequency-to-Voltage converters provide analog voltages to DC drive systems with the accuracy and stability of digital technology. Used in conjunction with an Avtron tach, encoder, pulse generator, the Avtron F-V converter is the best replacement for older analog tachometers. Avtron F-V converters are easy to install and economical.

K660A (Precision Rate Converter)

  • 10 VDC at full scale frequency input
  • 4-20 mA at full scale frequency input
  • Direction sensing with Bi-directional pulse generator
  • Mill-duty and reliable
  • 20 KHz input, full scale

K661 (F-V Converter)

  • 50/100/200 volts per 1000 RPM
  • Direction sensing with a Bi-directional pulse generator
  • Mill-duty and reliable
  • 24 KHz input, full scale

K662 (F-V Converter)

  • 0-10VDC output for newer drive systems
  • Direction sensing with a Bi-directional pulse generator
  • Mill-duty and reliable
  • 14.4 KHz input, full scale

K663 Analog Signal Converter, Isolator, Transmitter

  • 2 Input Channels
    • Channel 1 for current shunt, current transformer, or +/- 10 VDC
    • Channel 2 for armature voltage up to +/- 750 VDC
  • 3 Signal Outputs
    • +/- 10 VDC for armature voltage and current
    • 0-10 KHz quadrature for armature current

Brushless Tachometers

M3 with K661
Typical Brushless Tach (M3 Pulse Generator plus K661 Converter).

Avtron pioneered the idea of the “brushless tachometer” system. The analog tachometer is replaced by an Avtron rotary pulse generator, which may be foot mounted, NEMA 56C face mounted or shaft mounted. The frequency produced is exactly proportional to RPM, irrespective of temperature, and is then converted to an analog signal. This can be done with far greater accuracy than the output of any analog tachometer. Combined repeatability and linearity is 0.002% and temperature effect is insignificant. There are no brushes to contaminate and specifications remain stable under demanding mill conditions.

Avtron’s Brushless Tachometer improves drive regulation and reduces maintenance by directly replacing “precision” analog speed feedback tachometers:

  • Improves speed regulation
  • Eliminates drift and non-linearities
  • Eliminates temperature effects
  • Easy to install
  • Economical
  • Eliminates brush maintenance

The Brushless Tachometer is considerably more accurate and is maintenance-free. Output is an analog signal with polarity determined by direction of rotation. This allows use of the Brushless Tachometer with nearly any electric drive, static or rotating, irrespective of horsepower or manufacturer, without modifying the drive in any way.

Call Joliet Technologies TODAY 

If you have any questions concerning Avtron’s Adjustable Speed Drives and Drive Systems or related products, please contact us by:
Phone (815) 725-9696,
Toll Free (866) 492-9888,
Fax (815) 725-9393 or

On-Line Quotation Form

On-Line: Digital Drive Price Quotation Form

Joliet Technologies is an OEM that custom packages, integrates and engineers AC Variable Frequency Drives (VFD), DC Variable Speed Drives (VSD) and AC Drive Controllers. Our drive systems integrate top of the line manufacturers, like ABB, Emerson (Control Techniques & Saftronics / Fincor), Siemens and WEG to name a few. Our added value 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.