PXI-2535: Product OverviewThe National Instruments PXI-2535 is a high-density 2-wire matrix switch module designed for PXI-based automated test and measurement systems requiring extensive signal routing capabilities. This module provides a 64×32 cross-point matrix configuration, offering 2,048 individual signal paths that can be programmed to connect any of 64 inputs to any of 32 outputs. The architecture supports complex routing scenarios in automated test equipment (ATE) systems where multiple instruments need to be shared across numerous test points.Installed in a PXI chassis, the module operates using electromechanical relays arranged in a matrix configuration. Each cross-point can be independently controlled, enabling multiple simultaneous connections between different input and output pairs. The 2-wire (single-pole) switching configuration makes it suitable for applications requiring individual signal path control without the need for 4-wire Kelvin sensing. The module is designed for systems testing electronic components, circuit boards, and subassemblies where high channel count and reliable signal routing are critical requirements.
Core Features & Customer ValueThe primary value of the PXI-2535 lies in its exceptional channel density and routing flexibility. The 64×32 matrix configuration provides 2,048 crosspoints in a single PXI slot, enabling a single module to replace multiple smaller switching modules. This high density reduces system size, cost, and complexity while improving reliability through component count reduction. For test engineers designing high-channel-count systems, this translates to significant space savings and simplified system architecture.The 2-wire switching architecture provides a cost-effective solution for applications where individual signal path control is sufficient, such as digital I/O routing, power switching, and general-purpose signal routing. The electromechanical relay technology offers reliable performance with low contact resistance and stable characteristics over time. While slower than solid-state alternatives, these relays provide excellent signal integrity for DC and low-frequency applications where contact resistance is not critical.The module’s software-programmable architecture enables dynamic reconfiguration of signal paths during test execution, supporting complex test sequences without manual intervention. Integration with National Instruments’ Switch Executive software simplifies the programming of complex signal routes and provides visual feedback of current switch configurations, reducing development time and potential configuration errors.Typical ApplicationsIn semiconductor test systems, the module routes test signals between parametric measurement units and hundreds of device pins for production testing of complex integrated circuits and system-on-chip (SoC) devices.In automotive electronics validation, the matrix switches between multiple sensors, actuators, and electronic control units (ECUs) for comprehensive functional testing of vehicle electronic systems.For aerospace and defense systems testing, the module connects test instruments to various subsystems and components for validation and qualification testing of avionics and military electronics.
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