Electronic overload relay

Rockwell's Allen-Bradley E300 electronic overload relay integrates communication and Ethernet and has an embedded web server to simplify maintenance and control operations.

11/19/2013


Rockwell's Allen-Bradley E300 electronic overload relay integrates communication and Ethernet and has an embedded web server to simplify maintenance and control operations. Courtesy: Rockwell AutomationThe Allen-Bradley E300 electronic overload relay integrates communications, including EtherNet/IP, patented current-measurement technology, and I/O options in a modular design. The modularity provides users with the flexibility to tailor the device to meet their exact needs, thereby enabling their motor-driven processes to perform more efficiently and profitably. The E300 overload relay’s native dual-port EtherNet/IP option simplifies network wiring, by allowing E300 overload relays to be daisy-chained and by eliminating the need for an Ethernet switch. The E300 overload relay also provides an embedded Web server, which allows maintenance personnel to use a simple Web browser to integrate the E300 overload relay from any Internet-enabled device without the need for special software. To maintain uptime in the event of a network node interruption, the E300 overload relay supports a device-level ring (DLR) network topology. 

The E300 overload relay contains an embedded Allen-Bradley DeviceLogix logic engine with preprogrammed motor-control logic for local and remote motor operation, simplifying device integration into an automation system. One cable connects the E300 overload relay 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. To ease swapping of E300 overload relays, the operator stations also support a copycat feature, which enables users to download pre-stored relay configurations at the push of a button.

The E300 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 analog expansion I/O modules allow users to select between traditional analog signals and a range of specific resistance temperature detectors (RTDs) embedded in the motor. 

Rockwell Automation

www.rockwellautomation.com 

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