Omega OMB-AI-EXP32 User manual

Servicing North America:
U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047
Stamford, CT 06907-0047 USA
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: [phone] Fax: [phone]
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide
omega.com [email protected]
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves
the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

3
Table of Contents
Preface
About this User’s Guide .......................................................................................................................4
What you will learn from this user’s guide.........................................................................................................4
Conventions in this user’s guide.........................................................................................................................4
Where to find more information.........................................................................................................................4
Chapter 1
Introducing the OMB-AI-EXP32 ...........................................................................................................5
Overview: OMB-AI-EXP32 features .................................................................................................................5
Software features................................................................................................................................................5
Chapter 2
Installing the OMB-AI-EXP32 ...............................................................................................................6
What comes with your OMB-AI-EXP32 shipment? ..........................................................................................6
Hardware .......................................................................................................................................................................... 6
Documentation.................................................................................................................................................................. 6
Unpacking the OMB-AI-EXP32 ........................................................................................................................6
Connecting to a OMB-DAQ-2416 series module with the DSUB37 expansion connector................................6
Connecting the device for I/O operations...........................................................................................................7
User connectors................................................................................................................................................................. 7
Screw terminal pin outs .................................................................................................................................................... 8
Expansion connector........................................................................................................................................................10
Associating CJC channels with thermocouple channels...................................................................................10
Chapter 3
Specifications......................................................................................................................................11
Compatibility....................................................................................................................................................11
Analog input.....................................................................................................................................................11
Channel configurations.....................................................................................................................................12
Compatible sensors..........................................................................................................................................................12
Accuracy...........................................................................................................................................................12
Thermocouple measurement accuracy.............................................................................................................................12
Analog input DC voltage measurement accuracy ............................................................................................................13
Digital input/output...........................................................................................................................................13
Power................................................................................................................................................................14
Environmental ..................................................................................................................................................14
Mechanical .......................................................................................................................................................14
Screw terminal connector type and pin-out ......................................................................................................14
Expansion port..................................................................................................................................................14

4
Preface
About this User’s Guide
What you will learn from this user’s guide
This user's guide describes the Omega Engineering OMB-AI-EXP32 data acquisition devices and lists device
specifications.
Conventions in this user’s guide
For more information about …
Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
Where to find more information
Additional information about OMB-AI-EXP32 hardware is available on our website at www.omega.com. You
can also contact Omega Engineering by phone, fax, or email with specific questions.
Phone: [phone]
Fax: [phone]
Email: [email protected]m

5
Chapter 1
Introducing the OMB-AI-EXP32
Overview: OMB-AI-EXP32 features
The OMB-AI-EXP32 is an expansion module you can use to add up to 32 single-ended analog inputs or 16
differential analog/thermocouple inputs to compatible hardware, such as OMB-DAQ-2416 series devices. Each
input channel is software configurable for either voltage or thermocouple. The analog inputs are provided on
four rows of removable screw terminals.
The voltage measurement speed is the same as the connected OMB-DAQ-2416 series module. When measuring
thermocouples, configure the OMB-DAQ-2416 series module for differential inputs.
The OMB-AI-EXP32 also provides up to 16 additional digital I/O channels. You can independently configure
each channel for either input or output.
You can connect the OMB-AI-EXP32 to a OMB-DAQ-2416 series module with the 37-pin expansion
connector. The OMB-AI-EXP32 supports all of the analog/thermocouple input and digital I/O features of the
OMB-DAQ-2416 series module.
The OMB-AI-EXP32 is powered by the OMB-DAQ-2416 series module.
Software features
For information on the features of InstaCal and the other software included with your OMB-AI-EXP32, refer to
the OMB-DAQ-2400, OM-USB, OM-WEB, and OM-WLS Series Data Acquisition Software User's Guide that
shipped with your device.

6
Chapter 2
Installing the OMB-AI-EXP32
What comes with your OMB-AI-EXP32 shipment?
The following items are shipped with the OMB-AI-EXP32.
Hardware
OMB-AI-EXP32
Documentation
In addition to this hardware user's guide, you should also receive the OMB-DAQ-2400, OM-USB, OM-WEB,
and OM-WLS Series Data Acquisition Software User's Guide. This booklet supplies a brief description of the
software you received with your OMB-AI-EXP32 and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.
Unpacking the OMB-AI-EXP32
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the OMB-AI-EXP32 from its packaging, ground yourself using a wrist strap or by
simply touching the computer chassis or other grounded object to eliminate any stored static charge.
If any components are missing or damaged, notify Omega Engineering immediately by phone, fax, or e-mail.
Phone: [phone]
Fax: [phone]
Email: [email protected]m
Connecting to a OMB-DAQ-2416 series module with the DSUB37
expansion connector
Use the 37-pin expansion connector to connect the OMB-AI-EXP32 to a OMB-DAQ-2416 series module.
To connect the two modules directly to each other, follow these steps.
1. Disconnect the USB cable from the OMB-DAQ-2416 series module.
2. Remove the external power cable from the OMB-DAQ-2416 series module.
3. Connect the two devices together by inserting the OMB-AI-EXP32's DSUB37 connector into the DSUB37
connector on the OMB-DAQ-2416 series module.

OMB-AI-EXP32 User's Guide Installing the OMB-AI-EXP32
7
Figure 1. OMB-AI-EXP32 directly connected to an OMB-DAQ-2416
4. Turn the connected modules over and secure the connection by screwing the connection plate to both
modules, as shown below.
Figure 2. OMB-AI-EXP32 secured to an OMB-DAQ-2416
5. Connect the external power supply to the power input port of the OMB-DAQ-2416 series module, and then
plug it into an AC outlet.
By connecting external power to the device before connecting the USB cable to the computer, the OMB-
DAQ-2416 series module informs the host computer upon connection of the USB cable that the device
requires minimum power from the computer's USB port.
6. Connect the USB cable from the OMB-DAQ-2416 series module to the host computer's USB port.
Connect to a USB 2.0 high speed hub to achieve the highest transfer rate (480 Mbps).
When connected to a USB 1.1 full-speed port, the transfer rate is limited to 12 Mbps.
Connecting the device for I/O operations
User connectors
The following table lists the device connectors and compatible hardware for the OMB-AI-EXP32.
User connectors and hardware
Connector type
Six banks of removable screw-terminal blocks
37-pin male DSUB connector (for connection to parent device)
Wire gauge range (screw terminals)
16 AWG to 30 AWG

OMB-AI-EXP32 User's Guide Installing the OMB-AI-EXP32
8
Screw terminal pin outs
Figure 3. Single-ended mode pin out

OMB-AI-EXP32 User's Guide Installing the OMB-AI-EXP32
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Figure 4. Differential mode pin out

OMB-AI-EXP32 User's Guide Installing the OMB-AI-EXP32
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Expansion connector
The OMB-AI-EXP32 has a 37-pin male DSUB connector that connects directly to the 37-pin female DSUB
connector on a OMB-DAQ-2416 series module.
Figure 5. DSUB37 expansion connector pin out
Information on signal connections
General information regarding signal connection and configuration is available in the Guide to Signal
Connections. This document is available in the Documents subdirectory where you installed the software.
Associating CJC channels with thermocouple channels
TC channels must immediately follow their associated CJC channels in the channel array. For accurate
thermocouple measurements, associate CJC channels with the TC channels as listed below.
CJC channels
TC channels
CJC6
TC8 through TC11
CJC7
TC12 through TC15
CJC8
TC16 through TC19
CJC9
TC20 through TC23
CJC10
TC24 through TC27
CJC11
TC28 through TC31
When measuring thermocouples, configure the OMB-DAQ-2416 series module for differential inputs.
EGND.....
NC.....
DIO_LOAD1.....
DIO_LOAD2.....
IMEN7.....
IMEN8.....
IMEN9.....
IMEN10.....
IM_A0.....
IM_A1.....
IM_A2.....
NC.....
NC.....
VCC.....
AGND.....
EXP_CH.....
AGND.....
EXP_CL.....
AGND.....
.....EGND
.....NC
.....SCK
.....MOSI
.....SDA
.....SCL
.....CM_A2
.....SM_A0
.....SM_A1
.....CM_A3
.....EXTDIO_INT
.....VDD_ISO
.....-20.5 V
.....AGND
.....+20.5 V
.....+5 VA
.....AGND
.....+3.3 V_ISO