Analog input card DNx-AI-224 series

4-channelfor strain gauges

The DNx-AI-224 are high speed, four channel strain gage input boards for UEI's data acquisition and control Cubes and RACKtangle I/O racks respectively. The boards provide an ideal combination of high speed, accuracy and connection flexibility and are suitable for use in a wide variety of applications. The analog inputs offer 18-bit resolution at sample rates up to 100 kilosamples per second. Each channel has an A/D converter and all four channels are sampled simultaneously. The combination of the 18-bit resolution with the board's automatic offset zeroing and automatic gain calibration ensure the measurements are extremely accurate. Each channel also includes an anti-aliasing filter that automatically is configured to match the sample rate (*Please see the note on the following page for details) The DNx-AI-224 accepts inputs from full, half or quarter bridge gages and load cells. Bridge completion resistors are built in for use with 120, 350 and 1000 ohm gages. Of course full bridge gages of any resistance value may also be measured. Each channel offers an independent excitation output, programmable from 0 to ±10 Vdc, in 65535 steps. The excitation outputs can drive up to 50 mA each, allowing 1k bridges to be driven at ±10 Vdc, 350 ohm bridges at ±8.75 V and 120 ohm bridges at up to ± 3 Vdc. The board provides on-board compression and tension shunt calibration with shunt-calibration values selectable between 10 k and 170 k ohm, in 256 steps. Connections for external, user supplied shunt resistors are also provided.