Chapter 2
Installation
©
National Instruments Corporation
2-5
National Instruments UMI-7774/7772 User Manual
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Installation Category II is for measurements performed on circuits
directly connected to the electrical distribution system. This category
refers to local-level electrical distribution, such as that provided by a
standard wall outlet (for example, 115 AC voltage for U.S. or
230 AC voltage for Europe). Examples of Installation Category II are
measurements performed on household appliances, portable tools,
and similar modules.
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Installation Category III is for measurements performed in the
building installation at the distribution level. This category refers to
measurements on hard-wired equipment such as equipment in fixed
installations, distribution boards, and circuit breakers. Other examples
are wiring (including cables), bus bars, junction boxes, switches,
socket outlets in the fixed installation, and stationary motors with
permanent connections to fixed installations.
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Installation Category IV is for measurements performed at the primary
electrical supply installation (<1,000 V). Examples include electricity
meters and measurements on primary overcurrent protection devices
and on ripple control units.
Unpacking the UMI-7774/7772
The UMI-7774/7772 ships in an antistatic package to prevent electrostatic
discharge from damaging device components.
After removing the UMI-7774/7772 from the package, inspect it for loose
components or any other signs of damage. Contact National Instruments if
the device appears damaged in any way.
Caution
Do
not
touch exposed connector pins. Doing so may cause damage to the device.
Installation
Complete following steps to install the UMI-7774/7772.
1.
Mount the UMI-7774/7772, if necessary.
2.
Connect the UMI-7774/7772 to third-party stepper and servo drives
and/or feedback and digital I/O connectors on National Instruments
motion controllers.
3.
Test the signal connections starting with the limit and home switches,
then the encoders, and concluding with the inhibit and command
connections.