The National Instruments PXI-8108, part number 198410D-012L, is an embedded PXI controller designed for modular test and measurement systems. It occupies the system slot of a compatible PXI chassis and provides the computing core for installed PXI modules. The controller integrates processing, memory, storage, and communication interfaces into a single PXI module.
Embedded controllers simplify PXI system architecture by placing the computer inside the chassis. This reduces external cabling between a host computer and the measurement backplane. The PXI-8108 supports automated test, laboratory measurement, and industrial validation applications that require a compact and integrated controller.
Processing and System Resources
The PXI-8108 provides processing resources for operating system tasks, application software, and instrument communication. System memory supports multitasking workloads, while local storage holds programs and data. These resources allow the controller to run measurement applications, logging services, and user interfaces on one platform.
Engineers should plan software selection and memory use for the application. Operating system and driver versions should match the controller capabilities. Documentation of software versions helps maintain repeatability.
Interfaces and Connectivity
The controller provides Ethernet, USB, serial, and display connectivity according to its configuration. Ethernet supports network communication and remote access. USB ports connect peripherals and storage. Serial interfaces support equipment integration. Display outputs support local monitoring and operator interfaces.
Network planning should consider addressing, security, and data throughput. Peripheral connections should be strain relieved. Documentation of network settings helps troubleshooting.
PXI Integration
The PXI-8108 installs in the system slot of a compatible PXI chassis. It connects directly to the PXI backplane and manages installed modules. This architecture supports timing and triggering resources of the chassis and reduces latency compared with external host designs.
Engineers should verify chassis compatibility, cooling, and power requirements. Module placement and cable management affect access and thermal performance.
Software and Workflow
The controller is designed to work with NI software environments and standard operating system tools. Engineers can develop applications for measurement, logging, and control. Applications can run locally on the controller and interact with PXI modules.
For automated test, the controller can sequence instrument settings, acquire data, and evaluate limits. Software should include error handling and safe shutdown behavior.
Applications
The PXI-8108 is suited to automated test, laboratory measurement, production validation, and control applications. It supports PXI systems that require an embedded controller with reliable operation and flexible connectivity.
Installation and Maintenance
Installation requires inserting the controller into the system slot of a compatible PXI chassis and connecting power, display, and network cables. The chassis should provide adequate cooling. Cable management and slot documentation help maintenance.
Maintenance includes checking connections, reviewing software versions, monitoring storage, and verifying network communication. Documentation of system configuration helps reduce downtime.
Summary
The National Instruments PXI-8108 Embedded Controller provides a computing core for PXI chassis systems. It supports automated test, measurement, and control applications with integrated processing and connectivity. The PXI-8108 is a practical controller for compact PXI test systems.
