National Instruments NI-9230, Начало работы, Страница: 7 / 10

■
Connect the cable shield to the chassis ground (grounding screw of the
chassis).
■
For the NI-9230 with screw terminal, install a clamp-on ferrite bead (part
number 782802-01) on the input cable for each channel that you are
connecting to on the NI-9230.
■
For the NI-9230 with screw terminal, clamp-on ferrite beads must be
installed on the cable as close to the module as possible. Placing the ferrite
elsewhere on the cable noticeably impairs its effectiveness.
Figure 1. Cable Connections for EMC Compliance
NI 9230
with Screw Terminal
Shield
AI0+
AI0–
Shield
AI1+
AI1–
Shield
AI2+
AI2–
Ferrite
Signal
Source
Signal
Source
Signal
Source
Ferrite
Ferrite
Special Conditions for Marine Applications
Some products are approved for marine (shipboard) applications. To verify marine
approval certification for a product, visit ni.com/product-certifications , search by
model number, and click the appropriate link.
Notice
In order to meet the EMC requirements for marine applications,
install the product in a shielded enclosure with shielded and/or filtered
power and input/output ports. In addition, take precautions when
designing, selecting, and installing measurement probes and cables to
ensure that the desired EMC performance is attained.
Preparing the Environment
Ensure that the environment in which you are using the NI-9230 meets the following
specifications.
© National Instruments
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NI-9230 Getting Started