Eaton Releases Rapid Link 4.0 Motor Control Units

The latest Rapid Link 4.0 motor control units from Eaton's Electrical Sector are suitable for distributed control applications on conveyors and materials handling systems. The units, also suited to installations that benefit from decentralised motor control systems, are claimed to combine versatility, straightforward installation, pluggable connections, a space-saving compact construction and an IP65 rating that enables them to be used in tough environments.

The Rapid Link 4.0 range includes direct-online and reversing motor starters with electronic motor protection for 0.3kW to 3kW and variable-speed drives with four ratings up to 2.2kW. All models in the range have the same fixing arrangements and dimensions, which simplifies both plant design and equipment installation. In addition, the standardised design means that fitting a variable-speed drive unit in place of a direct-online starter - or vice versa - is a straightforward task, allowing changes in user requirements to be accommodated readily and inexpensively.

The compact square housings used by Rapid Link 4.0 allows power and motor cables to enter from either side or from the bottom and the unit to be rotated on the same fixing holes, which means that the units can always be mounted in a convenient position and orientation. All units in the range have the option of a lockable switch disconnector, ensuring fast and safe isolation from the electrical power source. A further option, available for variable-speed drive models, is an integrated brake chopper that eliminates the need for the installation of additional modules should a braking of the motor be required.

Motor starter units in the Rapid Link 4.0 range incorporate electronic control, enabling them to achieve a life of 10 million operating cycles at 3kW. The units are suitable for duty cycles of up to 3,000 starts per hour and can be used at temperatures of up to 55C without de-rating. The variable-speed drive units in the range are available with ratings of 0.75kW, 1.1kW, 1.5kW and 2.2kW, and all models can be set by the user to operate in either voltage frequency control or speed control mode.

The units incorporate a quick-stop function, which, thanks to its on-board intelligence, can be programmed with cyclical sequences, reducing the processing needed by the programmable logic controller (PLC). Rapid Link 4.0 motor control units from Eaton's Electrical Sector incorporate the latest AS-I 3.0 protocol, which provides a range of communication options between the PLC and the units. In addition to standard control functions, these options include the transmission of diagnostic information such as motor current as well as the transfer of operating parameters and set frequencies.

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