5
Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Omega Engineering OM-USB-2404-UI data acquisition device and lists device
specifications.
Conventions in this user's guide
For more information
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Caution!
Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
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Where to find more information
Additional information about OM-USB-2404-UI hardware is available on our website at
. You
can also contact Omega Engineering by phone, fax, or email with specific questions.
Phone: (203) 359-1660
Fax: (203) 359-7700
Email:
Hazardous voltages
You can connect hazardous voltages to the OM-USB-2404-UI device's spring terminals. A hazardous voltage is
a voltage greater than 42.4 V
pk
or 60 VDC to earth ground. Take the following precautions if you connect
hazardous voltages to the OM-USB-2404-UI:
Caution!
Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local
electrical standards.
Do not mix hazardous voltage circuits and human-accessible circuits on the same device.
Make sure that devices and circuits connected to the OM-USB-2404-UI are properly insulated
from human contact.
When device terminals are hazardous voltage LIVE (>42.4V
pk
/60 VDC), ensure that devices and
circuits connected to the OM-USB-2404-UI are properly insulated from human contact. A high
voltage screw terminal backshell (OM-ACC-176) must be installed when using hazardous
voltages to ensure that the terminals are not accessible.
Hazardous locations
The OM-USB-2404-UI is not certified for use in hazardous locations.