Beckhoff Automation Releases Speed Control I/O for Pump and Fan Motors

Beckhoff KL2791 Bus Terminal saves energy via efficient control of single phase AC motors

MINNEAPOLIS, June 17, 2008 – In order to help reduce energy use in pump and fan applications, Beckhoff Automation has announced the new KL2791 Bus Terminal for single-phase AC motor speed control. The KL2791 Bus Terminal enables direct connection of small, 1 A, single-phase motors rated 120 V, 60 Hz.

In many nations, electric motors account for more than half of the industrial electricity consumption – representing an area with enormous room for energy savings improvements. Better speed control can easily reduce excess energy use, resulting in far more cost-efficient and environmentally friendly applications. Beckhoff has expanded its Bus Terminal I/O system to help achieve this goal. Besides energy savings, improved speed control also offers noise reductions and an increase in the service life of the motor.

By using the KL2791 terminal, the energy use of capacitor, universal and shaded-pole motors can be greatly reduced. This technique is particularly suitable for drives with quadratic load characteristics such as fans and pumps. The speed controller is extremely compact and is in a standard Bus Terminal housing with a width of just 12 mm. The KL2791 Bus Terminal can be used in any of the numerous fieldbus networks supported by the Beckhoff Bus Terminal system.

The set value for the motor speed is specified by a 16-bit value. Using the KL2791, the motor is switched on and off with a practice-proven mains synchronous pattern, so that the motor consumes less power and the speed decreases significantly. This method is well suited to motors with fixed loads, such as pumps and fans, in order to achieve a setting range for the flow rate from 10 to 100 percent.

Beckhoff Automation provides advanced, open automation products based upon proven technologies so that customers can implement high performance control systems faster and at a lower overall cost than traditional PLC and motion control systems. Beckhoff’s “New Automation Technology” product range includes PC based control, industrial PCs, automation controllers, operator interface, I/O, servo drives and motors. With representation in more than 60 countries, Beckhoff is well positioned to provide global sales and service to its customers. Sales and service are handled directly, with no intermediaries involved to provide faster response and improved communications.

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