ECONOMICAL real-time remote monitoring and control of motor starters is now a reality with the launch of a new DeviceNet module for the Allen-Bradley E1 Plus electronic overload relay Rockwell Automation .
Part of the Modular Control System (MCS) range, the E1 Plus is a compact self-powered electronic overload relay suitable for a wide range of industrial applications.
The new DeviceNet module is the latest optional accessory to be added to the E1 Plus range, expanding its flexibility by allowing the cost-effective addition of intelligent motor protection to industrial networks.
Designed to mount directly onto the E1 Plus, the DeviceNet module adds just 18mm to the overall width.
All control circuit connections are made via the E1 Plus terminals, simplifying wiring and making installation quick and easy.
Its two discrete inputs and one relay output allow the E1 Plus DeviceNet module to monitor and control a starter over the network, delivering true remote motor management.
Parameters such as motor current, percentage of thermal capacity, device status, trip/warning identification and trip history can be continually monitored over a network and displayed on a human-machine interface (HMI) terminal or SCADA screen.
DeviceNet also allows network access to E1 Plus's advanced features, such as jam protection, overload and underload warnings.
Wide trip current adjustment means that a current range of 0.1 to 800A is covered by just five overload relays and one DeviceNet module.
Upgrading existing installations using the E1 Plus delivers significant performance enhancements over standard overload relays.
Using sophisticated thermal models of motor performance, motor loading can be accurately monitored without using heating elements, meaning the E1 Plus generates less than 2.5% of the heat of a traditional bi-metal thermal overload relay.
A dedicated phase-loss detection circuit enhances protection further, reacting to a phase-loss condition in less than three seconds - faster than traditional relays.