Programming instructions

Chapter 14 SCXI Hardware
DAQ Hardware Overview Guide 14-18 www.ni.com
The module powers up with its digital output lines in a high state or its
relays open. Calling
SCXI_Reset also sets all the digital output lines to a
high state.
The SCXI-1163 and SCXI-1163R modules support both multiplexed (or
serial) mode and parallel mode. You must set jumpers on the module
correctly for multiplexed or parallel mode. If you cable an MIO or AI
device, or Lab or 1200 device to the SCXI-1163 or SCXI-1163R, you must
set jumpers on the module to the MIO position. If you cable a DIO device
to the module, you must set jumpers on the module to the DIO position. If
you have not cabled any device to the module and NI-DAQ will be using
the SCXIbus backplane to communicate with the module, the MIO/DIO
jumpers are irrelevant.
If you are using remote SCXI, you can use the SCXI-1163 or SCXI-1163R
with or without the SCXI-1200 DAQ module, because NI-DAQ will
communicate with the SCXI-1163 or SCXI-1163R via the backplane and
through the serial port cable.
SCXI-1530, SCXI-1531
The SCXI-1530 and SCXI-1531 are four-channel and eight-channel,
respectively, modules for interfacing Integrated Circuit Piezoelectric
(ICP

) and other current excited accelerometers. The provide BNC
connectors for direct connectivity to accelerometer cables. You can turn the
4 mA current excitation on or off. You can set the bandwidth of the four
pole Bessel filter to 2.5, 5, 10 or 20 kHz. You can set the gain to 1, 10, or
100X. All channels are simultaneously sampled and held to preserve timing
and phase information. Excitation, bandwidth, and gain are set on a
per-channel basis without the use of jumpers. You configure the
SCXI-1530 and SCXI-1531 using the Measurement and Automation
Explorer or through function calls to NI-DAQ.
SCXI-1540
The SCXI-1540 module is an eight-channel module that interfaces directly
to LVDTs, RVDTs, and resolvers. The SCXI-1540 supports only the
multiplexed mode. Excitation level, frequency, wire mode (4-wire or
5-wire), and external synchronization is set from the configuration utility
on a per channel basis. The gain of each input channel is automatically set
from the input limits settings of the
AI_Config.vi when using LabVIEW.
Direct function calls to NI-DAQ can also be used for configuration,
calibration, and scaling of data. Use
SCXI_Set_Gain to set the analog