Chapter 3
Configuring Your SCXI Hardware and Software
3-14
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Table 3-8 shows the signal referencing configurations for jumper W46.
5.
If you are using any digital SCXI modules in serial mode and want
to connect the SCXI-1120/D module to the plug-in DAQ device,
configure the SCXI-1120/D module to connect the MISO signal to
the SERDATOUT pin (jumper W43).
SCXI-1121 Module
This module is a 4-channel isolation amplifier with excitation. Major
features include four channels of isolated input, 1,500 V
rms
isolation per
channel, current or voltage excitation, an analog input range of ±5 V,
240 V
rms
common-mode voltage, jumper-selectable lowpass three-pole
RC filters with values of 4 Hz or 10 kHz, and individually configurable
jumper-selectable channel gains of 1, 2, 5, 10, 20, 50, 100, 200, 500, 1,000,
and 2,000.
The SCXI-1121 module has 45 user-configurable jumpers. Position the
jumpers to configure gain, filtering, excitation mode, bridge completion,
and signal output referencing. Leave all other jumpers in their
factory-default positions.
Table 3-8.
SCXI-1120/D Signal Referencing Jumper Configuration
Jumper
Description
Configuration
B-R0R1—Parking position. Use this position for
MIO or AI devices in DIFF input mode.
(factory-default position).
AB-R2—Select this position for AI or MIO devices
in NRSE mode.
AB-R0—Connects the PGIA reference to data
acquisition analog ground, pins 1 and 2, of the rear
signal connector. Use this position for DAQ devices
with SE inputs, such as the Lab and 1200 devices,
or MIO and AI devices in RSE mode.
W46
R2 R1 R0
B
A
R2 R1 R0
B
A
R2 R1 R0
B
A
