Providing duplex throughput of 500 MB/sec, A/D PCEDAQ analog-input boards offer 16 or 64 channels, with 12- or 16-bit resolution at speeds to 3 MS/sec, and various functions that simplify data collection. Model PCEAO analog-output boards can simultaneously update 4 x 12-bit output channels at sustained rate of 1 MS/sec. Also, they allow bus-mastering data transfers for D/A and A/D.