National Instruments NI PXI-1050 User Manual

National Instruments NI PXI-1050 User Manual Manual pdf 18 page image

Chapter 1 Introduction© National Instruments Corporation 1-9 NI PXI-1050 User ManualSCXI Subsystem Backplane OverviewYou can use the SCXI subsystem in the following ways:• Install several SCXI modules and a PXI DAQ device in Slot 8 of thePXI backplane to control and/or acquire data from all the SCXImodules.• Install several SCXI modules and cable one of them to a DAQ devicethat controls and/or acquires data from all of the SCXI modules.• Install several SCXI modules and an SCXI-1200 module that operatessimilarly to a DAQ device, except that it communicates with the hostcomputer through a parallel port instead of the computer plug-in bus.• Install SCXI modules that are each dedicated to conditioning signalsfor only a single DAQ device (for example, in parallel mode), or thatoperate independently and only use the SCXI subsystem as a powersource and/or container. You can use the chassis this way in addition toor instead of one of the first three methods.PXI Subsystem Backplane OverviewThe following sections describe the PXI subsystem backplane.Interoperability with CompactPCIThe PXI backplane is interoperable with PXI-compatible products andstandard CompactPCI products. This is an important feature, because manyPXI-compatible systems may require components that do not implementPXI-specific features.For example, you may want to use a standard CompactPCI networkinterface card in a PXI chassis. The signals on the PXI-1050 backplaneP1 connector meet the requirements of the CompactPCI specification forboth the peripheral and system modules. The PXI-specific signals arelocated on the P2 connector and are found only on the signals that arereserved or not used in the CompactPCI 64-bit specification. Therefore,all modules that meet the CompactPCI 64-bit specification requirementswill function in the PXI-1050.