PC/104 DMM–AT 12–bit A/D D/A module The DMM–AT is a PC/104 data acquisition board that offers 16 total analog inputs with 12–bit resolution and programmable input range; 100,000 samples per second maximum sampling rate with FIFO operation; two ana- log outputs with 12–bit resolution; user–selectable ana- log output ranges; 16 lines of digital I/O (eight lines input, eight lines output); one 32–bit counter/timer for A/D conversion and interrupt timing; and one 16–bit counter/timer for general purpose use. PC/104 cards plug into any system with a PC/104 interface. The DMM–AT also provides autocalibration for both The Octagon family of PC/104 single board computers, analog input and output channels. All calibration adjust- expansion cards, and enclosures provides a complete solu- ments are performed using a TrimDAC. The optimum tion for applications in transportation, security, military, TrimDAC values for each input range are stored in an communications, distributed control, point–of–sale, EEPROM and recalled automatically on power up. ticketing machines, weighing equipment, and other similar applications. The analog input channels on the DMM–AT feature pro- grammable gains of 1, 2, 4, and 8, as well as program- mable unipolar/bipolar range, for a total of nine different input ranges. The 512–sample FIFO enables the board ® to operate at full speed in Windows operating systems using interrupts. Certified Partner program The DMM–AT is an Octagon Certified Partner The two analog output channels have multiple unipolar product, which is guaranteed compatible with and bipolar output ranges. The DACs feature simultane- Octagon CPU cards. The DMM–AT will withstand high ous update capability. A programmable output range shock and vibration, and operates in temperature ranges feature lets you set the output range via software any- from –40° to 85° C. This rugged expansion card will where between 0V to 10V in unipolar and –5V to +5V provide years of reliable service in the most challenging in bipolar modes. environments. A programmable gain amplifier, programmable unipo- lar/bipolar range, and programmable 5V/10V full–scale range combine to give the DMM–AT a total of nine dif- ferent possible analog input ranges. The digital I/O lines are CMOS/TTL compatible. These lines will interface with logic devices, switch inputs, LEDs, and industry–standard opto module racks. Octagon has a variety of opto modules and termination boards for easy access for field wiring. 11 6510 W. 91st Avenue • Westminster CO 80031 • 303–430–1500 www.octagonsystems.com DIGITAL I/O: Features � 8 dedicated digital outputs, 8 dedicated digital ANALOG INPUTS: inputs, TTL compatible � 16 input channels, may be configured as 16 � Input current ±1μA max single–ended or 8 differential � Output current: logic 0: 64 mA max.; � 12–bit resolution logic 1: –15 mA max. � Programmable gain, range, and polarity on inputs � All lines have 10 KΩ pull–up resistors � Input ranges: Bipolar: ±10V, ±5V, ±2.5V, ±1.25V Unipolar: 0–10V, 0–5V, 0–2.5V COUNTER/TIMERS & A/D TRIGGERING: � 100,000 samples per second maximum sampling rate � 1 32–bit counter/timer (2 82C54 counters cascaded) for A/D pacer clock and interrupt operation timing � 512–sample FIFO for reduced interrupt overhead � 1 16–bit counter/timer for user counting and � Autocalibration of all input ranges under timing functions software control � Pacer clock source: 10 MHz or 1 MHz on–board � Input bias current 50 nA max clock source � Max. input voltage ±10V for linear operation � General purpose 16–bit down counter (1 82C54 ctr) � Overvoltage protection ±35V on any analog input without damage AUTOCALIBRATION: � Nonlinearity ±1 LSB, no missing codes � Circuits calibrated – A/D (all 8 input ranges) and D/A � Conversion trigger software command, internal pacer clock, or external TTL signal � A/D error after calibration ±1 LSB (typical), ±2 LSB (max) � D/A error after calibration ±1 LSB (typical), ANALOG OUTPUTS: ±2 LSB (max) � 2 analog output channels with 12–bit resolution � D/A resolution 12 bits (1/4096 of full scale) CONNECTORS: � Multiple fixed full–scale output ranges, including � 50–pin connector for all I/O; connects to unipolar and bipolar ranges: C–50–18 cable Fixed unipolar: 0–5V or 0–10V Fixed bipolar: ±5V or ±10V Programmable: 0–10V or ±10V in .01V steps ADDRESSING & INTERRUPTS: � Autocalibration under software control � Jumper–selectable base addresses from 220h to 3E0h. � Output current ±5 mA max per channel � Interrupts selected via jumpers to indicate end of analog conversion. The board can also generate � Settling time 4 μS max. to ±1/2 LSB interrupts to transfer digital data into or out of the � Relative accuracy ±1 LSB board, as well as at regular intervals according to a programmable timer on the board. Individual control � Nonlinearity ±1 LSB, monotonic bits are used to enable each type of interrupt. 22 6510 W. 91st Avenue • Westminster CO 80031 • 303–430–1500 www.octagonsystems.com ENVIRONMENTAL: SOFTWARE DRIVERS � –40° to 85° C operating � DOS, Linux 2.4, QNX, & Windows XP, NT, 98 � 5% to 95%, RH, noncondensing ORDERING INFORMATION #6627 DMM–AT 12–bit analog, 16–channel, SIZE & POWER: I/O module � 3.550 in. x 3.775 in., PC/104 form factor; compatible with 8–bit bus systems � +5VDC ±10%, 220 mA typical ACCESSORIES ORDERING INFORMATION #6742 C–50–18, 50–conductor 18” ribbon cable � I/O header ±15V, current ±10 mA max with DACs unloaded #6747 STB 104, screw terminal board; mounts directly on PC/104 stack for easily–accessible � +5V output current limited by PC/104 power supply wiring termination 33 6510 W. 91st Avenue • Westminster CO 80031 • 303–430–1500 www.octagonsystems.com