Omega Products OMB-DAQ-54 User Manual
Personal Daq USB
Data Acquisition Modules
OMB-DAQ Series
U Multi-function Data Acquisition
Module Attaches to PC’s via
Universal Serial Bus (USB)
U Ultra Low-Power Design
Requires No External
Power or Batteries
U Can be Located Up to
5 m (16.4') from the PC
U High-Resolution, 22-Bit
A/D Converter
OMB-DAQ-56,
shown smaller
than actual size.
KMQSS-125U-12
U Built-In Cold Junction
Compensation for Direct
Thermocouple Measurements
U Frequency/Pulse/Duty-Cycle
Measurements Up to 1 MHz*
U Convenient Removable Screw-
Terminal Signal Connections
U 500 V Optical Isolation
from PC for Safe and
Noise-Free Measurements
U Programmable Inputs from
±31 mV to ±20V Full Scale
U Digital I/O Lines with Open
Collector Output for
Direct Drive Applications*
U Expandable Up to 80 Channels
of Analog and Digital I/O*
U Up to 100 Modules Can be
Attached to One PC Using
USB Hubs, for a Total Capacity
of 8000 Channels
U Digital Calibration—
No Potentiometers or
Adjustments Required
* The OMB-DAQ-54 does not have frequency,
digital I/O or expansion capability.
The compact
OMB-DAQ-54/55/56
is ideal for portable
data acquisition
applications
(laptop computer
not included).
JMQSS-125U-12
TMQSS-125U-12
U Spreadsheet-Style Software
for Setup, Acquisition, and
Real-Time Display; PostView
for Post-Acquisition Viewing
U Drivers for Visual Basic,
Delphi, and C++ for Windows
95/98/2000/ME/XP/Vista,
DASYLab, and LabVIEW
The OMB-DAQ-54, OMB-DAQ-55,
and OMB-DAQ-56 Personal Daqs
are full-featured data acquisition
products that use the Universal
Serial Bus (USB) built into almost
every new PC. Designed for
high accuracy and resolution,
the 22-bit OMB-DAQ-54/55/56
data acquisition systems directly
measure multiple channels of
voltage, thermocouple, pulse,
frequency, and digital I/O. A
single cable to the PC provides
high-speed operation and power
to the OMB-DAQ-54/55/56. No
additional batteries or power
supplies are required, except when
using bus-powered hubs.
Thermocouple probes
sold separately.
The OMB-DAQ-54/55/56 modules
are the first products in a new family
of low-cost, USB-based products
from OMEGA. Because of the strict
power limitations of the USB, the
modules incorporate special powermanagement circuitry to ensure
adherence to USB specifications.
The OMB-DAQ-54/55/56 modules
avoid many of the limitations of
PC-card (PCMCIA) data acquisition
devices and offer advantages over
many PC plug-in data acquisition
boards as well. The OMB-DAQ-54
data acquisition system offers
10 single-ended or 5 differential
analog (up to ±20V full scale)
or thermocouple input channels.
The OMB-DAQ-55 offers 10 singleended or 5 differential analog (up
to ±20V full scale) or thermocouple
input channels,16 programmable
ranges, 500V optical isolation, 8
digital I/O lines, and 2 frequency/
pulse/duty-cycle channels.
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1
Terminal
Block
OMB-DAQ-56, with removable terminal
blocks for wiring sensors.
The OMB-DAQ-56 offers twice the
I/O capacity of the OMB-DAQ-55
in the same size package.
To simplify attachment
of signals and transducers, the
OMB-DAQ-54/55/56 modules
feature convenient, removable
screw-terminal input connections.
SOFTWARE
The OMB-DAQ-54/55/56 modules
are supplied with Personal
DaqView, a Windows 98/2000/XP/
Vista-based data logging application
that lets the user set up acquisition
applications and save acquired data
directly to disk. Personal DaqView
supports the use of more than one
OMB-DAQ-54/55/56 module and
also includes enhanced features
such as overlapping charts and
multiple display groups. The OMBDAQ-54/55/56 modules are also
shipped with PostView, a postacquisition application that lets
the user display acquired data
previously saved to a file. Drivers
for Visual Basic, Delphi, and C++
for Windows 98/2000/XP/
Vista are included. In addition,
drivers are available for iconbased software packages, such as
DASYLab and LabVIEW.
ABOUT USB —
THE NEW PC CONNECTION
The Universal Serial Bus (USB) is a
new standard for connecting PCs to
peripheral devices such as printers,
monitors, and modems. USB offers
several advantages over conventional
serial and parallel connections,
including higher bandwidth (up to
12 Mbits/s) and the ability to provide
power to the peripheral device.
OMB-DAQ-56 Block Diagram
x1, 1/5
USB is ideal for data acquisition
applications. Since USB connections
supply power, only one cable is
required to link the data acquisition
device to the PC, which most
likely has at least one USB port. In
addition, the USB’s high-speed data
transfer (from the data acquisition
device to the PC) allows for a
real-time display of acquired data,
eliminating the need for expensive
memory in the acquisition device.
With the backing of Intel, Microsoft,
and hundreds of other computerrelated companies, USB is quickly
becoming a universal standard.
PERSONAL DAQ EXPANSION
The OMB-DAQ-55 and
OMB-DAQ-56 can be easily
expanded with one of two available
snap-on expansion modules,
bringing the total capacity to 60
analog or thermocouple channels,
32 digital I/O lines, and 4 frequency
x1, 2, 4, 8, 16, 32, 64, 128
V
input channels. Furthermore,
USB hubs can be used to create
multi-unit systems containing up
to 100 OMB-DAQ-55/56 modules
attached to a single PC. Using
this strategy, a multi-unit
OMB-DAQ-55/56 system can
provide up to 8000 analog and
digital I/O lines. See the chart on
the next page for available channel
capacity. The OMB-DAQ-54 does
not have expansion capability. The
enhanced Personal DaqView software
is required when using more than
one OMB-DAQ-55/56 module.
OMB-CA-179-1 USB Cable.
2
To Order, Call or Shop Online at omega.com
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