Chapter 2
Installation
©
National Instruments Corporation
2-3
National Instruments UMI-7774/7772 User Manual
•
Ensure that all devices in the system, including the UMI-7774/7772,
drives, and motors, are properly grounded.
•
Ensure that all power supplies and motor drives in the system are
powered down when connecting them to the UMI-7774/7772.
Safety Information
Caution
The following paragraphs contain important safety information you
must
follow
when installing and operating the UMI-7774/7772 and all devices connecting to the
UMI-7774/7772.
Do
not
operate the device in a manner not specified in the documentation.
Misuse of the device can result in a hazard. You can compromise the safety
protection built into the device. If the device is damaged in any way, return
the device to National Instruments for repair.
Keep away from live circuits. Do
not
remove equipment covers or shields
unless you are trained to do so. If signal wires are connected to the device,
hazardous voltages can exist even when the equipment is turned off. To
avoid a shock hazard, do
not
perform procedures involving cover or shield
removal unless you are qualified to do so. Disconnect all field power prior
to removing covers or shields.
If the device is rated for use with hazardous voltages (>30 V
rms
, 42.4 V
pk
,
or 60 V
dc
), it may require a safety earth-ground connection wire. See the
device specifications for maximum voltage ratings.
Note
Although some signal lines on the UMI-7774/7772 have optical isolation to reduce
noise effects and ground loops, the UMI-7774/7772 does not include safety isolation
features. Also, there is no isolation between signals, connectors, or axes on the
UMI-7774/7772 unless otherwise noted.
Because of the danger of introducing additional hazards, do
not
substitute
parts or modify the device. Use the device only with the chassis, modules,
accessories, and cables specified in the installation instructions. All covers
and filler panels must be installed while operating the device.
Do
not
operate the device in an explosive atmosphere or where flammable
gases or fumes may be present. If you must operate the device in such an
environment, the device must be in a suitably rated enclosure.
