The National Instruments 780587-31, also known as the PXIe-2531, is a high-density 512-crosspoint, 1-wire matrix switch module designed for demanding automated test systems requiring extensive channel counts. This module offers the flexibility of configuration as either a 4 × 128 or 8 × 64 matrix, making it suitable for a variety of applications. It incorporates compact, high-speed reed relays capable of switching speeds up to 2,000 cycles per second, ideal for low-current, high-speed tasks. The 780587-31 module supports a maximum switching voltage of 60 VDC or 30 VAC RMS, offering a maximum current of 0.5 A per channel, with each channel capable of handling up to 10 W of power.

This module features onboard relay counting for monitoring relay usage and includes hardware triggers to enhance operational efficiency. Its low initial DC path resistance of less than 1 Ω increases to approximately 2 Ω over the module's lifespan, ensuring reliable performance with an open channel resistance exceeding 1 GΩ. With a bandwidth of at least 20 MHz, the 780587-31 exhibits exceptional crosstalk performance, maintaining levels below -70 dB up to 10 kHz, -58 dB at 1 MHz, and -38 dB at 10 MHz. The unit allows for simultaneous operation of up to 40 relays on PXI systems and 64 relays on PXI Express systems, with relay operate and release times of just 0.25 ms. Triggering capabilities are versatile, utilizing PXI trigger lines with a minimum pulse width of 150 ns and programmable output pulse widths from 1 to 62 µs.

The compact design of the 780587-31, a single-slot 3U PXI/cPCI module, measures 21.6 cm by 2.0 cm by 13.0 cm and weighs 454 g. It operates effectively within a temperature range of 0 °C to 55 °C and can be stored between -40 °C and 70 °C. Built to endure operational shocks of 30 g and vibrations of up to 0.3 grms while in operation, this module is also compliant with various safety and EMC standards, including IEC, UL, and EN regulations.