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National Instruments Corporation
5
SCC-FT01 Feedthrough Module User Guide
When you configure the SC-2345 as an accessory to the E Series DAQ
device in Measurement & Automation Explorer (MAX), the program
automatically configures the SC-2345 in nonreferenced single-ended
(NRSE) mode. Connect the signal source to single-ended channels on the
SCC-FT01 while the SC-2345 is configured in the NRSE AI configuration.
You can configure the E Series DAQ device to read signals from the
SCC-FT01 in differential mode. Use a virtual channel in MAX or
application software to configure the E Series DAQ device to read the
signal in differential mode. When you read a signal in differential mode,
you use two channels for one measurement, but you avoid ground loops and
get a better signal by rejecting common-mode signal noise.
You can configure the E Series DAQ device on a per channel basis with
application software or virtual channels. For example, you can have
channels 0 and 8 in differential mode and 1 to 7 and 9 to 15 in NRSE mode.
Refer to the
Measurement & Automation Explorer Help
for more
information and instructions on configuring channels.
For more information about configuring the SCC-FT01 using NI-DAQmx,
refer to the
SCC Quick Start Guide
.
Customizing the SCC-FT01
You can customize the SCC-FT01 to connect to any of the AI, AO, digital
input/output, or counter signals of the E Series DAQ device. After you
customize the SCC-FT01, you can plug it into any SCC socket on
the SC-2345 except the SCC power socket. The SCC-FT01 PCB
contains 2.54 sq cm (1 sq in.) of prototyping breadboard area. This area
accommodates as many as four 8-pin integrated circuits and other discrete
components such as resistors and capacitors.
Place the SCC-FT01 prototyping module label, which is included in the kit,
over the SCC-FT01 feedthrough module label on the SCC enclosure. This
label does not contain signal names, so you can customize the assignment
of the screw terminals.
Circuit Design
You must disassemble the SCC-FT01 to install custom circuitry.
Complete the following steps to open the module.
1.
Remove the screw from the back (wide unlabeled side).
2.
Turn the front (wide labeled side) toward you.
3.
Place the screw terminal receptacle on the left.