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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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.
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Connection to USB-Powered Hub
USB
Four OMB-DAQS (with optional
OMB-PDQ modules) are connected
to ports of a USB-powered hub,
requiring an external power source.
PDQ Module
Personal Daq
USB Hub
Power Adaptor
EXAMPLE SYSTEMS
Direct Connection to Computer USB Port(s)
As a USB product, an
OMB-DAQ-54/55/56 data acquisition
system can be located up to 5 m (16.4')
from the PC, residing close to the point of
measurement for improved accuracy and
reduced noise. If USB hubs are used as
PDQ Module
Personal Daq
repeaters between USB cable segments,
the OMB-DAQ-54/55/56 can be located
USB
up to 30 m (98.4') from the PC.
Two OMB-DAQS (with optional OMB-PDQ modules) are connected by cable to
Speed vs. Resolution
Measurement
Duration
Max Sample Rate (Continous Calibration Disabled)
Voltage Thermocouple
each of the computer’s USB ports, requiring no external power source.
Resolution
(Bits RMS)
1 Channel/Scan 10 Channels/Scan 1 Channel/Scan 10 Channels/Scan (±4V)
610 ms
(50/60 Hz
Rejection)
1.6 Hz 0.16 Hz 1.5 Hz 0.16 Hz
(625 ms) (6.25 secs) (667 ms) (6.25 secs)
12.5 ms 66 Hz 7.8 Hz 25 Hz
(15 ms) (128 ms) (40 ms) (167 ms)
22
6 Hz 15
Specifications
GENERAL
Isolation: 500V from PC
Power Requirements:
Powered from USB, or from external
6 to 16 Vdc when used with a buspowered hub
An OMB-DAQ-56, and an OMB-PDQ2, simply plug together for additional channel capacity.
OMB-DAQ and Expansion System Channel Capacities
Volts/TC Freq/Pulse
Product or System Inputs* Digital I/O Inputs
OMB-DAQ-54 5 DE, 10 SE - -
OMB-DAQ-55 5 DE, 10 SE 8 2
OMB-DAQ-56 10 DE, 20 SE 16 4
OMB-PDQ1 Expansion Module 10 DE, 20 SE 16 -
OMB-PDQ2 Expansion Module 20 DE, 40 SE - -
OMB-DAQ-55 + OMB-PDQ1 15 DE, 30 SE 24 2
OMB-DAQ-55 + OMB-PDQ2 25 DE, 50 SE 8 2
OMB-DAQ-56 + OMB-PDQ1 20 DE, 40 SE 32 4
OMB-DAQ-56 + OMB-PDQ2 30 DE, 60 SE 16 4
Environmental:
0 to 50°C (0 to 122°F)
95% RH (non-condensing)
Dimensions:
92 W x 182 L x 45 mm H
(3.6 x 7.1 x 1.6")
ANALOG SPECIFICATIONS
Each channel is configurable for
single-ended or differential, volts,
or thermocouple inputs
OMB-DAQ-54 and OMB-DAQ-55:
10 single-ended, 5 differential;
volts or TC channels
OMB-DAQ-56:
20 single-ended, 10 differential;
volts or TC channels
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Input Voltage Range:
Software-programmable
on a per-channel basis
Differential Single-ended
-20 to 20V -10 to 20V
-10 to 10V -10 to 10V
-5 to 5V -5 to 5V
-4 to 4V -4 to 4V
-2.5 to 2.5V -2.5 to 2.5V
-2 to 2V -2 to 2V
-1.25 to 1.25V -1.25 to 1.25V
-1 to V -1 to 1V
-625 to 625 mV -625 to 625 mV
-500 to 500 mV -500 to 500 mV
-312 to 312 mV -312 to 312 mV
-250 to 250 mV -250 to 250 mV
-156 to 156 mV -156 to 156 mV
-125 to 125 mV -125 to 125 mV
-62 to 62 mV -62 to 62 mV
-31 to 31 mV -31 to 31 mV
Thermocouple Type and
Temperature Ranges:
J = -100 to 700°C
K = -200 to 1200°C
T = -100 to 400°C
E = -100 to 500°C
R = -400 to 1400°C
S = 400 to 1400°C
B = 700 to 1400°C
N = -100 to 700°C
Thermocouple Accuracy:
In very slow mode, 22 bit
resolution, includes cold
junction compensation error
J = ±1.1°C
K = ±1.2°C
T = ±1.1°C
E = ±1.0°C
R = ±2.5°C
S = ±2.6°C
B = ±3.3°C
N = ±1.5°C
Cold Junction Compensation
Accuracy: ±0.5°C
Over-Voltage Protection: ±45V
relative to analog Lo
AC Common Mode Rejection:
>120 dB @ 60 Hz
(OMB-DAQ-55/56)
Channel-to-Channel Crosstalk:
<-120 dB (DC to 100 Hz)
Accuracy:
OMB-DAQ-55/56: 0.015%
of reading +0.002% of range
(exclusive of noise)
OMB-DAQ-54: 0.015% of reading
+0.004% of range (exclusive
of noise)
Input Resistance: >10 MΩ (SE),
>20 MΩ (DE)
Bias Current: <1 nA (0 to 35°C)
Frequency Measurements
(OMB-DAQ55/56 Only):
OMB-DAQ-55: 2 frequency/pulse
input channels
OMB-DAQ-56: 4 frequency/pulse
input channels
Operating Modes: Pulse count
(totalize), duty-cycle and frequency
Frequency Response:
DC to 1 MHz
Input Range: ±15V absolute
minimum, <1.3V (low), >3.8V (high)
Pull-Up Resistor: 27 KΩ
Frequency and Duty-Cycle
Resolution: 7 digits; actual resolution
depends on scan rate. At 10 scans/s,
resolution is 5 digits (10 ppm); at
1 scan/s, 6 digits (1 ppm).
Digital I/O (OMB-DAQ55/56 Only)
Each I/O line is individually
programmable as input or output and
includes an open-collector driver with a
27 KΩ pull-up resistor to 5V for output,
with a Schmitt-trigger input buffer
OMB-DAQ-55: 8 digital I/O lines
OMB-DAQ-56: 16 digital I/O lines
Input
Voltage Range: ±15V thresholds:
<1.3V (low), >3.8V (high)
Output
Maximum Switch Voltage:
0 to 15 Vdc (20V for <1 minute)
Maximum Switch Current:
150 mA/output continuous,
500 mA/output peak (<100 µs),
150 mA total continuous (per bank
of 8 outputs)
Output Resistance: 10 Ω max
to 5V for switch or relay sensing
Debouncing: None, 0.8, 3.2
or 13 ms (software selectable)
Totalize: Up to 2
32
counts/scan
OMEGACARESM extended
warranty program is available for
models shown on this page. Ask
your sales representative for full
details when placing an order.
OMEGACARE
labor and equivalent loaners.
SM
covers parts,
To Order Visit omega.com/omb-daq55 for Pricing and Details
Model No. Description
OMB-DAQ-54 10-channel, 22-bit data acquisition system
OMB-DAQ-55 10-channel, 22-bit data acquisition system with frequency
measurement and digital I/O
OMB-DAQ-56 20-channel, 22-bit data acquisition system with frequency
measurement and digital I/O
OMB-PDQ1 20-channel analog and digital I/O expansion module for
the OMB-DAQ-55 and OMB-DAQ-56
OMB-PDQ2 40-channel analog expansion module for the
OMB-DAQ-55 and OMB-DAQ-56
OMB-CA-179-1 USB cable, 1 m (3.2')
OMB-CA-179-3 USB cable, 3 m (9.8')
OMB-CA-179-5 USB cable, 5 m (16.4')
OMB-CN-153-12 Terminal block (spare)
Each unit is supplied with Personal DaqVIEW software; drivers for Visual Basic, C++
and Delphi for Windows, terminal block and a complete operator’s manual on CD.
Ordering Example: OMB-DAQ-55 data acquisition system and OCW-1 OMEGACARESM
1-year extended warranty adds 1 year to standard 1-year warranty for OMB-DAQ-55
with OMB-PDQ1 expansion module and OCW-1 OMEGACARESM 1 year extended warranty
adds 1 year to standard 1-year warranty and OMB-CA-179-1 USB cable.
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To Order, Call or Shop Online at omega.com
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