Importance

Loading Importance Indicators...

Abstract

A system, method, and adapter for creating fault-tolerant communication busses from standard components, are described. Fault-tolerant interface logic is provided for transmitting and receiving system health and system management signals to and from a module that is designed to be connected to a single RS-485 bus. The fault-tolerant interface logic enables the module to selectively communicate via at least two redundant half-duplex, multipoint, differential RS-485 busses. The fault-tolerant interface logic includes a first RS-485 transceiver connected to a first RS-485 bus, a second RS-485 transceiver connected to a second RS-485 bus, selector logic responsive to a control signal for selecting one of the first and the second busses to receive signals from and for transmitting the received signals to the module, and software logic executable on a baseboard management controller (BMC) chip. The software logic includes control logic for monitoring the health of the selected bus and for providing the control signal to the selector logic.

Loading the Abstract Image...

First Claim