ACCES I/O Products, Inc.
MADE IN THE USA
USB-AO-ARB1 User Manual
2
manual revision B1a
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
output is ready to use; you can run any of the provided sample
programs to begin using the device.
If, for any reason, the Power/Activity LED does not light, launch
Device Manager and look under t
he “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
•
Fast waveform output; up to 8M samples/sec
•
Small, portable digital to analog single-ended output at
16-bit resolution
•
16 k sample FIFO buffer on-board
•
Jumper selectable analog output ranges of 0-2.5V, 0-5V,
0-10V, ±2.5V, ±5V, ±10V
•
Two 4-bit I/O ports independently selectable for inputs or
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 DIO and GATE
•
BNC connectors for DAC output
and
Gate Control
•
PC/104 module size and mounting compatibility
•
Alternate embedded USB connector
•
Small, rugged, industrial enclosure
The USB-AO-ARB1 features one single-ended analog output on a
type BNC connector running at up to 8MHz of continuous
conversions. The board includes a programmable clock capable of
1K - 8MHz transfers through a 16k word FIFO.
In addition to the one analog output, there are eight standard
digital I/O channels software configurable as two separate ports for
input or output (see block diagram).
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. Pull-ups or pull-downs on the board
assure that I/O lines are at a known state at power-up until the
board is initialized by system software. The I/O wiring connections
for the digital I/O lines on the USB-AO-ARB1 are via a 16-position
industry standard IDC connector.
The USB-AO-ARB1 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.
Control is possible either with custom application software, with
off-the-shelf applications (such as LabVIEW), or with provided
samples and utilities, including samples in Windows XP through
8.1, and Linux.
The analog output and gate input signals are accessed using
industry standard BNC connectors for assured signal integrity. The
8 digital I/O signals are connected via a right-angle IDC 16-pin
(0.1”
spacing) boxed and keyed header.
USB
&
µController
H
ig
h-
Sp
ee
d
U
SB
B
us
FPGA
with
16kSample
FIFO
16-Bit
1-Channel
DAC
Programmable
Oscillator
VDC
DAC OUT
BNC #1
GATE /
ENABLE
INPUT
BNC #2
4-Bit
Digital I/O
Buffer
16-PIN
IDC (0.1”)
HEADER
4-Bit
Digital I/O
Buffer
