The National Instruments 778572-75 is a high-density PXI multiplexer switch module designed for demanding automated test applications within the PXI-2575 model series. This module utilizes advanced electromechanical relays to efficiently route multiple signals to and from source units or measurement devices, ensuring precise signal management. The innovative onboard relay counting feature enhances relay monitoring and enables deterministic operation through hardware triggers, which significantly boosts test throughput. With the capability to support up to 32,000 connections, the 778572-75 optimizes scanning performance by minimizing host processor interruptions, resulting in more efficient testing workflows. When integrated with devices like the NI PXI-4070 FlexDMM, the module allows for issuing triggers after every measurement, further enhancing overall efficiency.

The relay counting capability not only aids in high performance but also facilitates predictive maintenance by providing valuable data to anticipate and resolve potential issues, thereby reducing unplanned system outages and increasing reliability. The module operates within strict electrical standards, supporting a maximum switching voltage of 100 V both channel-to-channel and channel-to-ground, along with a maximum switching power of 60 W per channel. It boasts a DC isolation resistance exceeding 1 GΩ and allows a maximum total current of 1 A, accommodating diverse testing requirements through various topologies such as 1-wire 196 × 1, 2-wire 95 × 1, and 2-wire 98 × 1 configurations.

National Instruments provides comprehensive software support for the 778572-75, including the IVI-compliant NI-SWITCH driver, which facilitates seamless functionality and integration with other switching modules. Additionally, the NI Switch Executive software enhances usability and productivity by delivering an intuitive environment for configuring, programming, and managing high-channel-count switching systems.