Inspired by input from end users, panel builders, OEMs and system integrators around the world, Rockwell Automation engineers developed the new Allen-Bradley E300 electronic overload relay. The E300 integrates communications, including EtherNet/IP, patented current-measurement technology and time-saving I/O options, all in a modular design. The modularity provides users with the flexibility to tailor the device to meet their exact needs, thereby enabling motor driven processes to perform more efficiently and profitably.
“As adoption of electronic overload relay technology has risen over the past decade, so have practical expectations,” says Adrian van Wyk, business manager power and components, Rockwell Automation sub-Saharan Africa. “Customers told us they value the technology’s remote monitoring and predictive trip alerts, but they also want designs that simplify programming, preserve network nodes, save wiring time, ease maintenance and minimise catalogue numbers.”
The Allen-Bradley E300 electronic overload relay offers:
* Standardised EtherNet/IP communications ease of installation and use. The E300’s native dual-port EtherNet/IP option simplifies network wiring by allowing relays to be daisy-chained and by eliminating the need for an Ethernet switch. The relay provides an embedded Web server, which allows maintenance personnel to use a simple Web browser to interrogate it from any Internet-enabled device without the need for special software. To maintain uptime in the event of a network node interruption, the E300 supports a device-level ring (DLR) network topology.
* Intelligent integration and operation. The relay easily integrates into the Rockwell Software Studio 5000 control environment via an add-on profile. This integration brings users five mouse clicks away from communicating data between the device and an Allen-Bradley Logix controller. The E300 Overload Relay contains an embedded Allen-Bradley DeviceLogix logic engine with pre-programmed motor-control logic for local and remote motor operation, simplifying device integration into an automation system. One cable connects the E300 to the operator station for local motor operation, eliminating the traditional hard-wiring time and costs, and consumption of discrete input points on the device.
* Expansion I/O reduces wiring time and network node count. The E300 offers a variety of digital and analogue expansion I/O modules, enabling users to maximise the relay’s capability, all within a single network node. The digital expansion I/O modules provide four inputs and two relay outputs, making it ideal for complex starter scenarios where users require more inputs and outputs than provided in the base overload. Additionally, the relay’s analogue expansion I/O modules allow users to select between traditional analogue signals and a range of specific resistance temperature detectors (RTDs) embedded in the motor. Combining the ability to receive both traditional analogue signals and RTD sensor signals in one device is an industry first.
* Patented current-measurement technology within modular design expands versatility. The overload relay contains a patented current-sensing solution, which leverages Rogowski technology. This technology enables the E300 to offer a 10:1 FLA range, which translates to fewer part number variations for simplified selection and reduced inventory.
The E300 modularity – consisting of sensing, control and communication modules – provides users the flexibility to tailor the relay to meet their sensing, control and communication needs. The sensing module is available with a combination of current, voltage and ground-fault sensing capabilities, as well as direct contactor mount, panel mount and pass-thru styles. The control module is available with variations of AC and DC digital inputs, as well as positive temperature coefficient (PTC) and ground-fault options ranging from 20-5000 mA.
For more information contact Adrian van Wyk, Rockwell Automation, +27 (0)11 654 9700, [email protected], www.rockwellautomation.co.za
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