USB-AIO16 Series

The USB-AIO Series offers an ideal solution for adding portable, easy-to-install high-speed analog and digital I/O capabilities to any PC or embedded system with a USB port. These units are USB 2.0 high-speed devices, offering the highest speed available on the USB 2.0 bus. The USB-AIO16-16F is a 16-bit resolution A/D board capable of speeds up to 1MHz (in real-time operating systems) for its 16 single-ended (16 pseudo-differential optional) or 8 differential analog inputs. Each channel can be independently software configured to accept 8 different input ranges. A unique, real-time internal calibration system allows the card to continually compensate for offset/gain errors giving a more accurate reading. Additional features include 16 digital I/O lines and 0, 2, or 4 analog outputs (analog outputs not applicable to USB-AI16-16 models). The unit is plug-and-play allowing a quick connection whenever you need additional I/O on the convenience of a USB port.

These small, compact, multifunction I/O units provide the user with everything needed to start acquiring, measuring, analyzing, and monitoring in a variety of applications. The USB-AIO Series data acquisition boards can be used in many current real-world applications such as precision measurement, analysis, monitoring, and control in countless embedded applications.

These units are designed to be used in rugged industrial environments but are small enough to fit nicely onto any desk or testing station. The board itself is PC/104 sized (3.550 x 3.775 inches, 90mm x 96mm) and comes inside a steel powder-coated enclosure with an anti-skid bottom. A DIN rail mounting option and extended temperature is available for installation in industrial environments.

The boards feature eight standard analog voltage input ranges (independently configured), two factory current input ranges (4-20mA or 10-50mA) and include a data sample buffer.

Analog to digital conversion starts or “A/D starts” are issued one of three ways: Software Start, Timer Start, or External Trigger Start. A/D starts are software configured to be either rising or falling edge. Additionally, A/D starts are software configured to be Single Channel or Scan. Single Channel samples data once from the next consecutive channel within the enabled set. A Scan samples data from all channels within the set at the fastest possible rate.

A fully programmable 8254 16-bit counter is provided with a maximum input frequency of 10MHz. The clock, gate (inputs) and output can be accessed externally for extended functionality. The counter can be configured in a variety of modes and has the ability to use external signals for its inputs.

Calibration

Advanced calibration models feature a unique real-time internal auto-calibration system that allows the card to compensate for offset/gain errors, giving a more accurate reading. To minimize noise, the board offers a technique called oversampling. Additionally, each channel contains its own analog ground pin on the I/O connector which is helpful in reducing noise from external signal sources. The channel-by-channel programmable gain feature enables measurement of an assortment of large and small signals in one scan—all under software control at up to 500kHz. The board’s data buffer and ability to trigger the A/D in real time ensures synchronized sampling that is unaffected by other computer operations—an essential requirement for signal, vibration and transient analysis where high data rates must be sustained for short periods of time. More information regarding calibration can be found in the product manual.

Each board shipped is factory calibrated as part of the production process using a high-quality 7 digit digital voltmeter (DVM) and an extremely stable voltage reference.

High Retention USB Connector

The ever-growing presence of USB in the industrial/military marketplace has driven the need for USB connections to be reliable, dependable, and unfailing. Gone are the days of loose USB connections. A type B USB connector is used on all ACCES USB/104 products which features a high retention design that complies with the class 1, Div II minimum withdrawal requirement of over 3 pounds of force (15 Newtons). This connector has an orange color-coded insulator to quickly differentiate it from standard USB connectors. Using these USB connectors increases reliability in your system and ensures a tight connection. For embedded OEM type applications, an additional micro-fit USB input header is provided in parallel with the type B connector.

Key Features:

• High-speed USB 2.0 multifunction DAQ
• Sustained sampling speeds up to 1Mbit/sec
• 16-bit resolution A/D converter
• Flexible, software configured functionality
• 16 single-ended or 8 differential analog inputs
• 8 input ranges, 4 unipolar and 4 bipolar, channel-by-channel programmable
• Autocalibration and oversampling for real-time accurate data
• 2 16-bit analog outputs available
• 16-bit programmable counter/timer
• USB/104 form-factor for OEM embedded applications