Tag Archives: Uni3405

UNI3405 Configuration and Setup

You can check out our previous blog post on the Control Techniques UNI3405 manual here for more information.

Since capacitance in the motor cable causes loading on the output of the UNI3405 Drive, ensure the cable length does not exceed 660 ft. (400 volts) or 410 ft. (480 volts).
Cable lengths in excess of the specified values may be used in the UNI3405 configuration only when special techniques are adopted; refer to the supplier of the Drive.

The maximum cable length  for the Unidrive UNI3405 configuration is reduced from that shown above under the following conditions:

  • PWM switching frequency exceeding 3kHz in model sizes 3 and 4 — The maximum cable length is reduced in proportion to the increase in PWM switching frequency, eg. at 9kHz, the maximum length is 1/3 of that shown.
  • High-capacitance cables – Most cables have an insulating jacket between the cores and the armour or shield; these cables have a low capacitance and are recommended. Cables that do not have an insulating jacket tend to have high capacitance; if a cable of this type is used, the maximum cable length is half that quoted in the table.
The Drive has two forms of thermal protection for the power output stage (IGBT bridge), as follows:
  1. A thermistor mounted on the heatsink monitors the heatsink temperature. If this exceeds 95 °C (203 °F), the thermistor will cause the Drive to trip. The display will indicate Oh2
  2. Intelligent thermal modelling estimates (by calculation) the junction temperature of the IGBTs. There are two temperature thresholds which cause the following to occur:
    • If the first threshold is reached, the PWM switching frequency is halved in order to reduce dissipation in the IGBTs. (When the frequency is halved, the value of parameter 0.41 PWM switching frequency remains at the value set by the user; if the frequency is 3kHz or 4.5kHz, no halving occurs). Then at one second intervals, the Drive will attempt to restore the original PWM switching frequency. This will be successful if the estimated temperature has reduced sufficiently.
    • If the estimated temperature has continued to rise and reaches a second threshold, the Drive will trip. The display will indicate Oh1.

You can get price and availability by emailing sales@mroelectric.com or calling 1-800-691-8511.

Control Techniques uni3405

UNI3405: Beyond the User Manual Parameters

The UNI3405 Unidrive is part of the Classic Unidrive series. Control Techniques introduced the Unidrive Classic around 1993 in Europe and approximately 1995 in the Americas. Because the Unidrive Classic ran simple Open Loop, Closed Loop Vector, and Servo motor applications as well as offering a Regen mode, the UNI3405 found its way into a great many industrial applications, from simple to quote complex. Visit our website to checkout all of our Control Techniques products.

Due to its status as a legacy product, the UNI3405 is becoming available only in limited quantities.

The UNI3405 contains approximately 500-600 parameters that help machine manufacturers achieve the desired functionality for a certain machine requirement. Some applications may require 20-30 or more parameters to be changed from the drives factory default settings. Should drive replacement become necessary, one must have a complete and accurate list of these parameters so that the original functionality can be restored. If you do not have a list of the required parameters, one could copy down these parameters manual. This is assuming that the drive still works enough to power the display, and even then the manual copying of parameters is tedious and error prone.

For more info you can visit our product page here. You can get price and availability by emailing sales@mroelectric.com or calling 1-800-691-8511.


Control Techniques Unidrives and Environmental Responsibility

Control Techniques Unidrive

Control Techniques Unidrives and Environmental Responsibility


Control Techniques is committed to minimizing the environmental impacts of their manufacturing operations and of their products throughout their life cycle. To this end, they operate an Environmental Management System (EMS) which is certified to the International Standard ISO 14001. Further information on the EMS, their Environmental Policy, and other relevant information is available on request or can be found at www.greendrives.com.

The electronic variable-speed drive manufactured by Control Techniques (such as the Control Techniques UNI1405) have the potential to save energy and reduce raw material consumption and scrap throughout their long working life through increase machine/process efficiency. In typical applications, these positive environmental effects far outweigh the negative impacts of product manufacture and end-of-life disposal.

Nevertheless, when the products eventually reach the end of their useful life, they can be very easily dismantled into their major components for efficient recycling. Many parts snap together and can be separated without the use of tools, whilst other parts are secured with conventional screws. Virtually all parts of the product are suitable for recycling.

Product packaging is of good quality and can be re-used. Large products are packaged in wooden crates; whilst smaller products come in strong cardboard cartons which themselves have a high recycled fiber content. If not re-used, these containers can be recycled. Polyethylene, used on the protective film and bags for wrapping product, can be recycled in the same way. Control Techniques’ packaging strategy favors easily-recyclable materials of low environmental impact, and regular reviews identify opportunities for improvements which are consistently being made.

When preparing to recycle or dispose of any product or packaging, please observe local legislation and best practice.

MRO Electric and Supply has new and refurbished Control Techniques products available. We also offer repair pricing. For more information, please call 800-691-8511 or email sales@mroelectric.com.