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SC-2072 Board
Chapter 4
SC-207X Series User Manual
4-4
© National Instruments Corporation
Power Connections
Because the SC-2072 board is a general-purpose board, it has a more flexible power connection
scheme than the SC-2070 and SC-2071 boards. In addition, the SC-2072 board comes in two
different configurations based on your external power supply needs.
Both configurations of the SC-2072 come with two power-selection switches and a three-
position screw-terminal block, all of which are dedicated to selecting the digital power supply
and its ground. Switch S1 selects either the internal or the external digital power supply. If you
set the switch to the external supply (labeled EXT), the terminal block is connected to the local
power and ground lines. If you set the switch to the internal supply (labeled INT), the switch S2
is responsible for selecting the power inputs from the I/O cable. Switch S2 is a three-position
switch that configures the SC-2072 to connect to pins 49 (+5 V) and 50 (DGND) in position A,
to no I/O pins in position B, and to pins 33 (DGND) and 34 (+5 V) in position C. Table 4-1
shows the setting to be used with each of the National Instruments DAQ devices.
Table 4-1. Switch S2 Settings for National Instruments DAQ Devices
Device
S2 Setting
AT-DIO-32F
AT-MIO-16
AT-MIO-16D
AT-MIO-16F-5
AT-MIO-16X
AT-MIO-64F-5
Lab-PC
Lab-PC+
DAQCard-1200
DAQPad-1200
PCI-1200
PC-DIO-24
PC-DIO-96
PC-LPM-16
PC-TIO-10
B
C
C
C
C
C
A
A
A
A
A
A
A
A
C
MC-DIO-24
MC-DIO-32F
MC-MIO-16
A
B
C
Lab-LC
Lab-NB
NB-DIO-24
NB-DIO-32F
NB-MIO-16
NB-MIO-16X
A
A
A
B
C
C
DAQCard-700
DAQCard-DIO-24
PC-OPDIO-16
A
A
A
Summary of Contents for SC-207 Series
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