National Instruments DAQCard-1200 - Manual (Page 19)

Chapter 2 Installation and Configuration
© National Instruments Corporation 2-3 DAQCard-1200 User Manual
If you are using LabWindows/CVI, the software installation instructions
are in Part 1, Introduction to LabWindows/CVI, of the Getting Started with
LabWindows/CVI manual. After you have installed LabWindows/CVI,
refer to Chapter 1, Configuring LabWindows/CVI, of the LabWindows/CVI
User Manual for software configuration instructions. Then follow
DAQ configuration instructions in your NI-DAQ user manual.
Analog Input Configuration
At startup, the DAQCard-1200 defaults to the following configuration:
• Referenced single-ended input mode
• ±5 V analog input range
Table 2-1 lists the available analog I/O configurations for the
DAQCard-1200 and shows the default settings.
The analog input circuitry is software configurable.
Warning Connections, including power signals to ground and vice versa, that exceed any of
the maximum signal ratings on the DAQCard-1200 can damage your card and
computer. National Instruments is
NOT liable for any damages or injuries resulting
from incorrect signal connections.
Analog Input Polarity
You can select the analog input on the DAQCard-1200 for either a unipolar
range (0 to 10 V) or a bipolar range (–5 to +5 V). If you select a bipolar
range, the two’s complement coding is selected. In this mode, –5 V input
corresponds to F800 hex (–2,048 decimal) and +5 V corresponds to
7FF hex (2,047 decimal). If you select a unipolar mode, the straight binary
coding is selected. In this mode, 0 V input corresponds to 0 hex, and +10 V
corresponds to FFF hex (4,095 decimal).
Table 2-1. Analog I/O Settings
Parameter Configuration
Analog Input
Polarity Bipolar—±5 V (default setting)
Unipolar—0–10 V
Analog Input Mode Referenced single-ended (RSE) (default setting)
Non-referenced single-ended (NRSE)
Differential (DIFF)