Fairbanks sectional controller

Fairbanks - 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 output 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. It 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.