Product Overview
The National Instruments PXI-8364 is an MXI-Express x1 copper interface card for PXI systems. It is used to connect a host computer to PXI chassis over a high speed cable, allowing the host to control the chassis and its installed modules. The card supports daisy chain configurations, which allow multiple chassis to be connected in a sequence.
The PXI-8364 is part of the NI MXI-Express family, which provides remote control and expansion for PXI systems. Remote control is useful when measurement hardware must be located near the device under test while the computer remains in a separate location. Daisy chaining provides a way to expand the number of slots and instruments without adding a separate host interface for each chassis.
Daisy Chain Architecture
In a daisy chain configuration, the host connects to the first chassis, and additional chassis are connected in sequence. This reduces the number of host slots required and simplifies cabling compared with parallel connections. Engineers should confirm the supported number of chassis and cable lengths for the planned configuration.
Daisy chaining shares the link bandwidth among the connected chassis and instruments. Engineers should estimate the data rate requirements of each instrument and verify that the shared link can support the combined load. For bandwidth intensive applications, a different topology may be more appropriate.
Copper Cable and Distance
The PXI-8364 uses copper cable for the MXI-Express link. Copper cables are suitable for shorter distances within a rack or laboratory, and they provide a cost effective connection. Cable length limits should be respected, and cables should be routed away from power conductors to reduce interference.
Connectors should be inspected before mating and should be fully engaged to ensure reliable communication. Strain relief and secure cable management reduce the risk of intermittent faults, especially in systems that are moved or reconfigured. Documenting cable routing helps during maintenance and expansion.
Detection and Configuration
Once the link is established, the connected PXI chassis and modules are detected by the host software and can be configured and programmed as part of the system. Engineers should verify that the host meets the requirements for the number of chassis and modules in the configuration and that the appropriate drivers are installed.
Host BIOS and operating system settings can affect detection and performance. Engineers should confirm that the host interface and drivers are compatible with the installed operating system and that the system resources required by the configuration are available.
Software and Integration
The PXI-8364 is supported by NI PXI Platform Services and standard NI instrument drivers. Instruments in the connected chassis can be programmed with LabVIEW, LabWindows/CVI, Measurement Studio, and other compatible development environments.
The interface preserves access to the timing and synchronization resources of the PXI chassis. Trigger lines and clocks remain available to installed modules, allowing coordinated operation between instruments. The host connection handles data transfer and control while the chassis manages module timing.
Typical Applications
Remote control of PXI chassis
Daisy chain expansion of test systems
Multi chassis measurement architectures
Systems with host and hardware separated
Laboratory research platforms
Rack mounted test equipment
The PXI-8364 provides an MXI-Express x1 copper interface with daisy chain support for PXI systems. Its expansion capability and integration make it suitable for test architectures that require multiple chassis connected to a single host.
