Diamond Systems DMM-32X-AT 32-Channel 16-Bit Rugged PC/104 Analog I/O Module with Autocalibration

Long-running PC/104 measurement systems need a replacement board that slots in without rewriting the application. The DMM-32X-AT is Diamond Systems’ 32-channel PC/104 data acquisition module, described by Diamond as a compatible upgrade for the DMM-32-AT, with 16-bit inputs, 12-bit outputs and the company’s patented auto-autocalibration.

The 32 inputs can be configured as 32 single-ended, 16 differential or a mix, with bipolar ranges from ±10 V down to ±0.625 V and unipolar ranges from 0-10 V down to 0-0.625 V. Sampling reaches 250 kHz, and a three-stage timing system triggers the A/D by software, on-board clock or external signal, then samples one channel, round robin or a full scan. A 1,024-sample FIFO with a programmable interrupt threshold handles transfer to memory. Auto-autocalibration recalibrates the board as temperature changes, holding accuracy to within ±1 LSB typical.

Four 12-bit analog outputs cover ±5 V, ±10 V, 0-5 V and 0-10 V and can update together, with a 1,024-sample waveform buffer at up to 100 kHz. Digital I/O adds 24 buffered lines, programmable in groups of eight with jumper-selectable pull-up or pull-down resistors and ESD protection, plus four auxiliary inputs and outputs, a 32-bit pacer clock and a 16-bit counter/timer. The DMM-32DX-AT fits 16-bit outputs, and the RMM-1616A-XT adds 16 analog outputs where inputs are already covered.

The DMM-32X-AT runs from +5 V at 410 mA typical and is tested and guaranteed from -40 to +85 °C, with ±35 V input protection. Jumpers can be replaced with 0-ohm resistors for high-vibration installs, conformal coating and latching connectors are options, and the Universal Driver supports Linux, RT Linux, Windows, Windows CE, VxWorks, QNX and DOS.