BNC-2142 Installation Guide
2
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Connecting Signals to Your BNC-2142
This section describes how to connect field signals to your BNC-2142
accessory.
Table 1 describes the BNC connectors available on the front panel of your
BNC-2142.
Note
All BNC connectors on the BNC-2142 are single-ended only. The outer shells of the
BNC connectors are in direct contact with the metal enclosure of the BNC-2142, which is
grounded via the SHC68-C68 analog cable shield to the chassis ground of your computer.
Caution
Connecting ground-referenced sources to the analog inputs or ground-referenced
loads to the analog outputs may cause ground noise to be picked up from other electrical
equipment also referenced to the source or load ground. Additionally, if the source or load
ground is at a different electrical potential than the ground of the BNC-2142 and DSA
device, ground-loops may occur that can result in incorrect readings, and may damage the
BNC-2142, the DSA device, or the host computer. National Instruments is not liable for
damage resulting from these connections.
To avoid encountering these conditions, electrically isolate or float the source or load from
its reference ground to create single-ended connection with a single ground reference on
the BNC-2142.
Table 1.
BNC-2142 Connector Signal Descriptions
Front Panel BNC
Connectors
Signal Description
ACH<0..3>
Single-ended Input Analog Channels 0
through 3
DAC0OUT
Digital-to-Analog Converter 0 Output—This
single-ended connector supplies the voltage
output of analog output channel 0.
DAC1OUT
Digital-to-Analog Converter 1 Output—This
single-ended connector supplies the voltage
output of analog output channel 1.
Summary of Contents for BNC-2142
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