ACCES I/O Products, Inc.
MADE IN THE USA
USB-AI16-2A
2
manual revision A1d
C
HAPTER
1:
Q
UICK START
It is recommended that you install the software package before
connecting the USB module to your computer. You can install the
software
1
using either a stand-alone installer downloaded from the
website or an optional Software Master CD.
Run the installer you downloaded (or autorun.exe on the Software
Master CD) and follow the prompts to install the software for your
device.
Once the software has been installed: If your device is configured
to use external power, connect the voltage source to the device,
then turn on the power. Plug the USB cable into both the USB
module and your system.
As soon as the green Power/Activity LED lights, your new analog
input module is ready to use; you can run any of the provided
sample programs to begin acquiring analog input data or
controlling and monitoring the digital I/O lines.
If, for any reason, the Power/Activity LED does not light, launch
Device Manager and look under the “Data Acquisition” section. If
the USB device displays a warning triangle, right-click and select
“Update Driver”.
Please note: during the installation you may be prompted regarding
the installation of non-WHQL-certified drivers; please carefully
confirm the digitally signed source of the drivers and accept the
installation.
1
In Linux or OSX please refer to the instructions in those directories.
C
HAPTER
2:
I
NTRODUCTION
USB, the world’s most popular peripheral interconnect bus,
provides an easy way to add capabilities of all kinds to your system.
Although originally intended for Human Interface Devices like mice
and keyboards, advances to the specification enabled reliable and
high speed connectivity for everything from audio devices to frame
grabbers.
FEATURES
High-speed USB 2.0 device (USB 3.0+ compatible),
w/High-retention USB connector
Two 1MHz 16-bit A/D converters for 2MHz aggregate
sampling rate
Analog and digital inputs acquired simultaneously and
time-stamped
4k sample FIFO (shared by all inputs)
Per channel software selectable ranges of 0-1V, 0-2V, 0-
5V, 0-10V, ±1V, ±2V, ±5V, ±10V
Eight digital I/O’s (four inputs & four high-current outputs)
All 8 DIO lines buffered with Sink 32mA / Source 32mA
current capabilities
Jumper selectable 10k ohm Pull-up/Pull-down resistors on
DIO lines
Standard 16-pin IDC connector for Digital I/O lines
BNC connectors for Analog Inputs
PC/104 module size and mounting compatibility
Alternate USB micro-fit header can be used to reduce
board footprint in embedded applications
Small rugged steel industrial enclosure
The USB-AI16-2A is a high-speed USB 2.0 device designed for many
applications including laboratory and semiconductor fab signal
analysis. This product is a USB-based Analog to Digital (A/D)
converter board that features two single-ended 16-bit analog
inputs with software selectable input ranges, per channel. The
board samples each A/D at 1MHz, simultaneously, for an aggregate
speed of 2MHz.
Also provided are four general purpose digital inputs and four high-
current digital outputs. The inputs and outputs are jumper
configured for 10k ohm pull-up or pull-down resistors (inputs and
outputs are separately configured).
The A/D conversion process is initialized by software control and
can be started either by software command or digital input trigger
via the right angle I/O header connector. Two status signals are
provided at the I/O header; one indicates conversions are enabled;
the other indicates the board's FIFO is almost full. Each sample
acquired includes both of the analog input channels and the four
digital inputs simultaneously. All data acquired by the board is time
stamped with microsecond resolution.
All required power is normally supplied to the board via the USB
cable, however for higher current sourcing capabilities, optional
external power may be used. The I/O wiring connections for the
digital I/O lines on the USB-AI16-2A are via a 16-position industry
standard IDC connector.
The USB-AI16-2A is designed to be used in rugged industrial
environments but is small enough to fit nicely onto any desk or
testing station. The board itself is PC/104 sized (3.550 by 3.775
inches) and ships inside a steel powder-coated enclosure with an
anti-skid bottom.
