Chapter 2
Installing SCXI Modules and Connecting the SCXI System to the DAQ Device
©
National Instruments Corporation
2-5
The DAQ device communicates with the SCXIbus through the
connector at the bracket end of the cable assembly. Therefore, you do
not need to connect the remaining modules to the SCXI cable assembly.
Notice that the extra male breakout connector of the SCXI cable
assembly is usually not connected to other modules. You can use this
male breakout connector to connect unconditioned signals from the
DAQ device to an SCXI-1180 feedthrough panel, SCXI-1181
breadboard module, or the SCXI-1351 one-slot cable extender.
In some cases, you can use an NB1 cable instead of the SCXI-1340
cable assembly. The NB1 cable and the SCXI-1340 are functionally
identical; however, the SCXI-1340 ensures a more secure attachment
than the NB1 cable, eliminating the possibility of inadvertently
loosening the cable. The SCXI-1340 also has an extra male breakout
connector that provides access to unconditioned signals using an
SCXI-1180 feedthrough panel or SCXI-1181 breadboard module.
Cable assemblies also have an integral rear panel that you can fasten to
the SCXI chassis with two screws. Using a cable assembly, you can
remove a module from or insert a module into the chassis without
disconnecting the cable.
3.
If you are using an SCXI-1180 feedthrough panel to access unused
lines of the DAQ device, install the feedthrough panel in the slot
directly to the right of the module cabled to the DAQ device. Attach
the SCXI-1180 feedthrough panel cable to the 50-pin male breakout
connector of the SCXI cable assembly connected to the adjacent
module.
4.
If you are using an SCXI-1181 breadboard module, install the
breadboard module in the slot directly to the right of the module that
is connected to the DAQ device. Attach an SCXI-1351 one-slot cable
extender to the 50-pin male breakout connector of the SCXI cable
assembly connected to the adjacent module. Attach the other end of
the SCXI-1351 to the rear signal connector of the SCXI-1181
breadboard module.
If you want to use more than 12 modules with a single DAQ device,
you must use more than one SCXI chassis. In this case, you must use
multichassis adapters.
