Digital input card DNx-AI-211 series

analogmulti-channelfor vibration sensor

The DNx-AI-211 is a high performance, four-channel vibration measurement board. The board is specifically designed to allow direct connection to industry standard 2-wire vibration sensors (e.g. ICP and IEPE). Each channel is based upon its own 24-bit A/D converter. This A/D per channel mode allows all four channels to be sampled simultaneously, allowing vibration data on different channels to be easily correlated in the time domain. The board will sample all four channels up to their maximum 125 kSPS (maximum board throughput of 500 kSPS). Using the chassis powerful trigger/sync interface, channels on multiple boards and even in multiple chassis are easily configured to sample simultaneously. The board's 24-bit converters provide exceptional accuracy with signal to noise ratios (SNR) of 109 dB at 5 kHz and 97 dB at the board's 125 kSPS max sample rate. The 24-bit converters also provide the dynamic range required to monitor everything from the smallest signals up to a full scale shock on a single input range. However in those few instances where even higher resolution is required for extremely low level signals, the AI-211 input amplifier offers 4 different input ranges from +25/-13 VDC to ±3.125VDC. Anti-aliasing filtering is provided by a combination of analog and digital FIR filters. The digital filter allows a combination of low passband ripple (±0.005 dB), steep falloff and low stop band floor (-100 dB) unattainable with simple analog filtering. The digital nature of the filter also ensures that each filter induces an identical phase shift so no filter induced inter-channel phase jitter will impact or corrupt subsequent analysis.