Chapter 3
Configuring Your SCXI Hardware and Software
©
National Instruments Corporation
3-31
Jumper W12 selects various grounding and shielding options. The
factory-default position, CD, leaves the grounds disconnected and is
suitable for most applications. For more information, refer to the
SCXI-1140 User Manual.
3.
Configure the gain selection.
Use the eight 4-bit DIP switches, U12 through U19, to select the gains
of channels 0 through 7, respectively, as shown in Table 3-23. The
factory-default position sets the gain to 1; that is, all four bits of each
DIP switch are set to the off position (number side up). Select other
gains by setting one or more of the four bits of a particular DIP switch
to the on (closed) position as indicated in Table 3-24.
Table 3-22.
SCXI-1140 Instrumentation Amplifier Jumper Configuration
Jumper
Description
Configuration
AB—Use this setting for MIO or AI devices in
DIFF mode (factory-default position).
BC—Use this position for DAQ devices with SE
inputs such as the Lab and 1200 devices, or MIO
and AI devices in RSE mode.
Table 3-23.
SCXI-1140 Gain Switches for Each Channel
Channel
Use DIP Switch
0
U12
1
U13
2
U14
3
U15
4
U16
5
U17
W9
A
C
B
A
C
B
