Smart sectional controller. Multiplex and digitizing two analog load cells onto a multi-drop
RS-485 bus. Each cell is provided with 6.3 VDC excitation voltage. the ouput is connected
to its own load cell input circuit that contains a separate gain stage and analog filter
circuits. The filtered outputs are multiplexed into the input of a 24 bit A/D converter that is
monitored by a micro-processor, which controls the multiplex. applies additional signal
processing such as digital filtering.The processed load cell signals are then available on
the RS-485 bus via a special protocol.