The DB-889D is an expansion multiplexer / amplifier board for use with A-82X, PCI-1800 series and 818 families. Each DB-889D multiplexes 16 differential analog input channels into one analog input of the DAS board. The high grade instrumentation provides software programmable gains of 0.5 ,1,5 ,10,50, 100, 500, and 1000.
Thermocouple measurements are handled easily with the DB-889D. The board includes cold-junction sensing and compensation circuitry that provides a scaling of 24.4 mV/°C. Biasing resistors are included for open thermocouple detection. The DB-889D can be cascaded to a total of 128 channels of voltage measurements or 112 channel of thermocouple measurements.