ACCES I/O Products, Inc.
MADE IN THE USA
USB-AO-ARB1 User Manual
4
manual revision B1a
C
HAPTER
5:
PC
I
NTERFACE
The USB-AO-ARB1 is a USB 2.0 High-Speed device compatible with
2.0 and 3.0 USB ports.
The ubiquitous USB port provides a convenient and hot-pluggable
interface for adding this high-speed waveform output DAC board
to most any existing system.
In addition to the industry standard type-B USB connector an
alternate micro-fit embedded USB header connector is provided.
This connector provides a very small footprint, latching signal
interface that avoids the stiff and bulky USB cable.
The USB-AO-ARB1 can be powered via the USB cable (a powered
USB port is required), or from ex5VDC power supplied via
either a DC-jack (option -PR) or screw terminals (option -ST).
C
HAPTER
6:
I/O
I
NTERFACE
A total of three I/O connectors are provided on this device. A 16-
pin right-
angle shrouded and keyed male 0.1” spacing IDC header
contains the digital I/O bits and a digital input dedicated for use as
a waveform GATE signal. A pair of BNC connectors provide the
analog waveform output, and an alternate method of connecting
the GATE signal.
The pair of
BNC connectors are industry standard “female”
identical to those you would find on test equipment anywhere.
All DIO bits can be pulled up or down via jumper selection (in two
groups of four bits each). Pull-ups are generally used with input
mode (to make contact-closure monitoring easy), while outputs
are best configured for pull-downs (so external devices
don’t
activate while the computer is booting).
Pin
Signal
Names
Description
Pin
Signal
Names
Description
D
ir
ec
ti
o
n
gr
ou
p
0
1
DIO #0 Digital I/O bit 0 2
GND
Ground
3
DIO #1 Digital I/O bit 1 4
GND
Ground
5
DIO #2 Digital I/O bit 2 6
GND
Ground
7
DIO #3 Digital I/O bit 3 8
GND
Ground
D
ir
ec
ti
o
n
gr
ou
p
1
9
DIO #4 Digital I/O bit 4 10
GND
Ground
11
DIO #5 Digital I/O bit 5 12
GND
Ground
13
DIO #6 Digital I/O bit 6 14
GND
Ground
15
DIO #7 Digital I/O bit 7 16 /TX_EN GATE Input
3
.5
5
"
0
.3
0
"
0
.3
5
"
0
.2
0
"
0.20"
0.20"
3.775”
0.20"
USB
P2 - USB
P1
OUTPUT
POLARITY SELECT
OUTPUT
RANGE SELECT
VEXT
USE +5.0 VDC
POWER
VUSB
POWER FROM USB
VEXT VUSB
3
.5
5
"
OPTION -ST (SCREW TERMINAL)
+5V
GND
+5V INPUT (OPTIONAL)
VEXT
USE DC
POWER
DIGITAL BIT
PULL-UP/-DOWN SELECT
DIGITAL BITS 0-3
5V GND
UNI
BIP
DIGITAL BITS 4-7
PULL-UP
PULL-DOWN
0-5V
or ±5V
0-10V
or ±10V
0-2.5V
or ±2.5V
0-2.5V
0-5V
or 0-10V
±2.5V
5V
or
V
±
±10
GATE/EN
DAC CH 0
P3
Pin 1
UNI Ranges
BIP Ranges
5.0 VDC
GND
1 2
1 5 1 6
Option Selection Map & Dimension Drawing
