ABB RTXF18/RK926-115-AHBrand New
I/O Expander Bus
The I/O expander bus is a high speed, synchronous, parallel bus. It provides a communication path between controller and I/O modules. The controller provides the control functions and the DSI module provides input to the controller. The P2 card edge connector of the DSI module and controller connect to the I/O expander bus. The I/O expander bus is parallel signal lines located on the module mounting unit back plane. A 12-position dipshunt placed in a connection socket on the module mounting unit back plane connects the I/O expander bus to the controller and I/O modules. Cable assemblies can extend the I/O expander bus to six module mounting units. A controller and its I/O modules form an individual subsystem within a process control unit (PCU). The I/O expander bus between controller and I/O module subsystems must be separated by leaving a dipshunt socket empty or not connecting the module mounting units with cables.
Application
The GPU2000R is a Generator Protection Unit in the proven line of 2000R series relays. The 589T series is designed to provide primary and/or backup protection for small to medium size generators, and the 589V/589W series are suitable for synchronous generators of any size. Utilizing three advanced microprocessors, the GPU2000R provides multifunction protection, expansive fault and operations records, detailed metering, programmable inputs and outputs, and advanced communications options. These new series units also provide improved performance compared to the earlier 589R series: The sensitivity of the reverse power anti-motoring element is now down to 0.2% of rated machine power; the loss-of-excitation function is now accomplished by a mho-circle impedance element.
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