BNC-2111 Installation Guide
8
ni.com
Connecting Signals to the BNC-2111
This section describes how to configure the BNC-2111. Refer to the
section for a list of available signals on the BNC-2111.
Note
With NI-DAQmx, National Instruments has revised its terminal names so they are
easier to understand and more consistent among NI hardware and software products. The
revised terminal names used in this document are usually similar to the names they replace.
For a complete list of Traditional NI-DAQ (Legacy) terminal names and their NI-DAQmx
equivalents, refer to the
Terminal Name Equivalences
tables in the
M Series Help
for
M Series devices or the
E Series Help
for E Series devices at
ni.com/manuals
.
Connecting Analog Input Signals
Measuring Floating Signal Sources
To measure floating signal sources, move the selector switch to the floating
source switch position labeled RSE. When the selector switch is set to the
RSE position, the outer shields of all 16 analog input BNC connectors are
connected to the DAQ device’s AI GND input, as shown in Figure 2 and
Figure 3.
Note
Measuring floating signal sources, such as isolated battery-powered equipment,
with the NRSE setting results in incorrect measurements.
Measuring Ground-Referenced Signals
To measure ground-referenced signals, move the switch to the NRSE
position. Refer to your DAQ device documentation for more information
on measuring floating and ground-referenced signals. When the switch is
in the NRSE position, the outer shields of all 16 analog input BNC
connectors are connected to the DAQ device’s AI SENSE input as shown
in Figure 2 and Figure 3.
