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USB Powered Acquisition Modules for Thermocouples Process Signals

USB Data Acquisition Modules for Thermocouples Process Signals


Item# OMB-DAQ-56

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$2,826.92
5-9 C$2,685.57
10-24 C$2,629.04
25-49 C$2,515.96
50-99 C$2,459.42
100+ C$2,402.88

Please contact Technical Sales Team for assistance.
USB Data Acquisition Modules for Thermocouples Process Signals OMB-DAQ-56 OMB-DAQ-56
  • The OMB-DAQ55-Series has been discontinued. Please click see OMB-DAQ-2416-Series for a potential replacement.
  • Ultra Low-Power Design Requires No External Power or Batteries
  • Can be Located Up to 5 Meters (16.4') from the PC
  • High-Resolution, 22-Bit A/D Converter

OMB-DAQ-56 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Number of Analog Inputs
Digital I/O
Additional Features
Analog Input Type
Analog Input Class
Maximum Sample Rate (per sec)
Analog Input Resolution
Input Range
Output Type
Number of Outputs
Output Range
Interface Protocol

* The OMB-DAQ-54 does not have frequency, digital I/O or expansion capabilty.

The OMB-DAQ-54, OMB-DAQ-55 and OMB-DAQ-56 Personal Daqs are full-featured data acquisition products that utilize the Universal Serial Bus (USB), which is 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 (the OMB-DAQ-54 does not have digital, frequency I/O). A single cable to the PC provides high-speed communication and power to the OMB-DAQ-54/55/56. No additional batteries or power supplies are required, except when using bus-powered hubs.

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 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 ±20 V full scale) or thermocouple input channels with 16 programmable ranges and 500 V optical isolation.

The OMB-DAQ-55 offers 10 single-ended or 5 differential analog (up to ±20 V full scale) or thermocouple input channels,16 programmable ranges, 500 V optical isolation, 8 digital I/O lines, and 2 frequency/ pulse/ duty-cycle channels.

The OMB-DAQ-56 offers twice the I/O capacity as 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.

Personal DaqViewTM a graphical data acquisition software, is an easy-to-use yet powerful application is provided with the OMB-DAQ-54, OMB-DAQ-55 and OMB-DAQ-56 at no additional charge. The software allows users to configure a test, and display or record data within minutes, without programming.

Personal DaqView lets the user
Select one of any OMB-DAQ devices connected to the system
Set up, configure and display analog, frequency, counter and digital I/O channels in real time
Easily and quickly configure acquisition parameters such as trigger events, stop events and acquisition scan rates
View real-time analog, frequency, and digital I/O using extensive charting and metering displays
Acquire analog, frequency, and digital I/O channels to disk in real time
AView acquisition status at a glance, including triggered time/date, acquisition progress, as well as acquisition destination file

Real-Time Displays
Personal DaqView allows the creation of real-time displays using built-in display options, including digital, dial meter, bar graph, and strip chart displays. No programming is required — simply point, click, and drag desired display options to create a visual display screen.

The OMB-DAQ-54/55/56 are also shipped with PostView, a postacquisition application that permits you to display acquired data previously saved to a file. Drivers for Visual Basic, Delphi and C++ for Windows XP SP2 and SP3/Vista/7 are also included. In addition, drivers are available for icon-based software packages, such as DASYLab and LabVIEW.

Personal DaqView PlusTM
The optional Personal DaqView Plus software provides advanced charting capabilities, including multiple traces per chart, multiple chart groups, and support for up to 100 Personal Daq devices attached to one PC.
Allows display groups to be created for customized viewing
Supports up to 100 Personal Daq devices

Personal DaqViewXLTM
The optional Personal DaqViewXL software allows Personal DaqView or Personal DaqViewXL Plus to execute seamlessly from within Microsoft® Excel’s tool palette. Acquired measurements are inserted directly into an Excel spreadsheet in real time.
Allows formula creation on acquired data
Provides control of acquisition from spreadsheet

Personal DaqViewXL PlusTM
The optional Personal DaqViewXL Plus combines the features of Personal DaqView Plus and Personal DaqViewXL into one package.

Expandable Inputs
The OMB-DAQ-55 and OMB-DAQ-56 are expandable through the use of the OMB-PDQ1 and OMB-PDQ2 expansion modules as shown in the table below. The OMB-DAQ54 does not have any expansion capability.
OMB-DAQ and Expansion System Channel Capacities
Product or System Volts/TC
Digital I/O Freq/Pulse
OMB-DAQ-54 5 DE, 10 SE None None
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
* DE = Differential Inputs, SE= Single-endied inputs.
Thermocouples are only available as differential inputs(DE)

Thermocouple Inputs and 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

Input Voltage Ranges
Differential Single-ended
-20 V to +20 V 10 V to +20 V
-10 V to +10 V 10 V to +10 V
-5 V to +5 V 5 V to +5 V
-4 V to +4 V 4 V to +4 V
-2.5 V to +2.5 V 2.5 V to +2.5 V
-2 V to +2 V 2 V to +2 V
-1.25 V to +1.25 V 1.25 V to +1.25 V
-1 V to +1V 1 V to +1 V
-625 mV to +625 mV 625 mV to +625 mV
-500 mV to +500 mV 500 mV to +500 mV
-312 mV to +312 mV 312 mV to +312 mV
-250 mV to +250 mV 250 mV to +250 mV
-156 mV to +156 mV 156 mV to +156 mV
-125 mV to +125 mV 125 mV to +125 mV
-62 mV to +62 mV 62 mV to +62 mV
-31 mV to +31 mV 31 mV to +31 mV

Speed Versus Resolution
Max. Sample Rate (Continous Calibration Disabled) Resolution
(Bits RMS)
Voltage Thermocouple
1 Channel/Scan 10 Channel/Scan 1 Channel/Scan 10 Channel/Scan
610 ms
(50/60 Hz
1.6 Hz
(625 ms)
0.16 Hz
(6.25 secs)
1.5 Hz
(667 ms)
0.16 Hz
(6.25 secs)
12.5 ms 66 Hz
(15 ms)
7.8 Hz
(128 ms)
25 Hz
(40 ms)
6 Hz
(167 ms)

500 V from PC
Power Requirements: Powered from USB, or from external
+6 to +16 VDC when used with a bus-powered hub
Environmental: 0 to 50°C (0 to 122°F)
95% RH (non-condensing)
92 W x 182 L x 45 mm H
(3.6 x 7.1 x 1.6")

WIN XP SP2 and SP3/Vista/7

Analog Specifications
Each channel is configurable for single-ended
or differential, Volts, or thermocouple inputs
10 single-ended, 5 differential; Volts or TC channels
20 single-ended, 10 differential; Volts or TC channels

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
Over-Voltage Protection: ±45 V relative to analog Lo
AC Common Mode Rejection: >120 dB @ 60 Hz
Channel-to-Channel Crosstalk:
<-120 dB (DC to 100 Hz);
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 M Ohm
(SE), >20 M Ohm (DE)
Bias Current: <1 nA (0-35°C)
  Frequency Measurements
(OMB-DAQ-55 and OMB-DAQ-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:
±15 V absolute maximum
<1.3 V (low), >3.8 V (high)
Pull-Up Resistor: 27 K Ohm to +5 V
for switch or relay sensing
Debouncing: None, 0.8, 3.2,
or 13 mSec. (software selectable)
Totalize: Up to 2 32 counts/scan

Frequency & Duty-Cycle
(OMB-DAQ-55 and OMB-DAQ-56 only)
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-DAQ-55 and OMB-DAQ-56 only)
Each I/O line is individually
programmable as input or output.
OMB-DAQ-55: 8 digital I/O lines
OMB-DAQ-56: 16 digital I/O lines
Each I/O line includes an open-collector
driver with a 27 K Ohm pull-up resistor
to +5 V for output, and a Schmitt-trigger input buffer
Digital Input
Voltage Range: ±15 V Thresholds:
<1.3 V (low), >3.8 V (high)
Digital Output
Maximum Switch Voltage:

0 to +15 Vdc (20 V 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 Ohms max
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Date published: 2017-12-24
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I have a data acquisition system&nbsp;(Omega OMB-DAQ-56) since this item is no longer available to purchase the required software is not available&nbsp;either. Would you be able to send me a software for that?

Asked by: A123
Thank you for your question. We will require more information to help on this question, please email the DAS team at DAS@OMEGA.COM
Answered by: Application Engineer PV
Date published: 2021-07-29

We have brand new module. When T-type thermcouples were pluged in and program was set, it shows higher temeperature than it is. Is it possible that module is not calibrated properly? Mesurment condtions and thermcouples (certified) are like in manual.

Asked by: Mike123
Thank you for your question. Please direct the issues you are having to our Data Acquisition Engr dept-DAS@OMEGA.COM.
Answered by: Raptor
Date published: 2021-01-25

What part number or specifications do you have for the required terminal block connectors this DAQ uses. We have a OMB-DAQ-56 at work and someone lost the green phoenix connectors and I'm having a terrible time replacing it.

Asked by: Anonymous
Hello, thank you for your question. The part number for the replacement input terminal block is OMB-CN-153-12.
Answered by: DA Engineer
Date published: 2020-04-22

I need software for the OMB-DAQ 54. I can't download it from you website.

Asked by: ewdvdsn
Thank you for your question. We will require more information to help on this question, please email the DAS team at DAS@OMEGA.COM&rdquo;
Answered by: Application Engineer PV
Date published: 2021-12-08

Is support for Windows 10 planned for the drivers? I am unable to get this device to work for windows 10

Asked by: ebDP
This is a older unit is is only supported by Windows 74 64 bit and older operating systems
Answered by: cwengineer3
Date published: 2020-12-08

Hello. What is the packaging dimensions for OMB-DAQ-54? We plan to include this as part of a kit, and need to know the size of the box.

Asked by: engbit
Hello I'm sorry we do not have the dimensions of the box, though for the unit itself it is 92 W x 182 L x 45 mm H (3.6 x 7.1 x 1.6&quot;)
Answered by: JA Engineer
Date published: 2019-11-10
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Expansion module, 40 single-ended (20 differential) volt/tc channels
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This item is discontinued. Please contact Technical Sales Team for assistance.
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