Receive a Text Quote
We will send you price and availability shortly
Invalid number. Please call (800) 691-8511
Looking for a fast quote? Click here, and we'll text you.

Control Techniques UD75

Rated 5/5 on 2 reviews

Rate this product

MANUFACTURER: Control Techniques

DESCRIPTION: Large Option Module Application Coprocessor CT Net


33 in stock

Ships Today

Free Shipping

2 Year warranty

Part NumberUD75
ManufacturerControl Techniques
TypeOption Modules
Warranty2 Year
DeviceUnidrive Classic
Option moduleLarge
Data rates5.0, 2.5, and 1.25 Mbit/s
Revision80700000005701 (obsolete) Use SM-Applications
Application Coprocessor
For UseV3 Unidrive

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed UD75 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this UD75 we also repair a wide range of other Control Techniques products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty UD75, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 1lb

Want it shipped today?

  • Order within the next 14 hours and 25 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty UD75 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Control Techniques UD75 Overview

The Unidrive Classic unit UD 75 CT Net is a large option module device manufactured by Control Techniques. The UD 75 is a revision D hardware part fashioned to improve the performance of CT Net.  These products are manufactured in United Kingdom and are designed for Metal production, paper processing, and material conveying usage. They come with a 2-year warranty from MRO Electric. We also carry Option Modules from other manufacturers such as Siemens and Yaskawa.

What is the advantage of the UD 75 revision D hardware? The advantage of the Rev D hardware is an improved output driver resulting in higher voltage pulses. The Rev D also offers a higher impedance input stage which reduces the applied network load that each node experiences. The point of this is to increase the number of nodes used for a single network grouping.  Also increased is the length of cable allowed for use for a single network segment.  It is possible to increase the length of the cable used on the segment by reducing the nodes used on a segment.

The hardware used on the Control Techniques UD 75 Revision D applies a mathematical figure to determine if the node combinations and cable lengths that are applied to segment designs in the CNet meet the specifications meeting the specifications for the data rate required. 

What are the data rates covered by the Control Techniques UD 75 Rev D unit?  The Rev D unit covers data rates of 5.0 Mbit/s, 2.5 Mbit/s and 1.25 Mbit/s.

Design of the CTNet sections and the Control Techniques UD 75

The layout of a typical CTNet network features either a single section or several sections linked together by a hub. A termination resistor is located at each section’s end.  Each section is limited by specific segment requirements. 

Each segment on the CTNet is limited in its node and cable length capability. Because there is a limit to cable and node length and grouping size, the configuration can be checked.  Each segment is checked by calculating the segment load factor and insertion loss factor. The CTNet network continues to run smoothly as long as both the segment load factor and the insertion loss factor are within the design specifications. 

Segment load factor and the Control Techniques UD 75 

What does the segment load factor determine? It determines with max number of nodes available for connection on a single segment of the network no matter the network length. Note that when calculating the segment load factor and insertion loss factor you must count ports and hubs as a node for that particular segment or section. 

How to check the segment load factor for suitability in a CTNet grouping

First, specify the data rate for the chosen network. Then you must determine the total number of Rev devices. Next, plot the point on the segment load factor graph where NRev C and D intersect. If the intersection is plotted above the specified data rate, then the operation cannot be guaranteed. You will have to split the segment (use a hub to split the segment). Repeat 1-3 for each segment. If the line intersects on or lower than the specified data rate, then it is within the specified limit for the segment.

Contact Us Today For More Information About Control Techniques Products

Check out the rest of our Control Techniques product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like UD75, take a look at more from our Option Modules line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our UD75 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

5 stars

4.9 Overall Satisfaction Rating

Over 1700 Ratings from Actual Customers

Read Our Reviews

Great company to work with

Anonymous Customer

Quick delivery and had what I needed.


Great and fast service. Exactly what we need.