The National Instruments 778572-31 PXI Matrix Switch Module, also known as the PXI-2531, offers versatile configuration options for signal switching across multiple topologies, including 1-wire 4 × 128 matrix, 1-wire 8 × 64 matrix, 1-wire dual 4 × 64 matrix, and 1-wire dual 8 × 32 matrix. This module supports a maximum switching voltage of 60 VDC and 30 VAC rms between channels, as well as 60 VDC and 30 VAC rms, CAT I channel to ground. It is capable of handling a maximum switching power of 10 W and a maximum current of 0.5 A per channel, while exhibiting a DC path resistance of less than 1 Ω initially, increasing to a minimum of 2 Ω over time.

The module facilitates system synchronization and coordination through its input trigger signals, which can be routed to PXI trigger lines 0 through 7 with a minimum pulse width of 150 ns. Conversely, the output trigger signals can be directed to the same trigger lines with a pulse width range of 1 μs to 62 μs. Designed as a single-slot 3U module, the PXI-2531 is fully compatible with PXI (PCI eXtensions for Instrumentation) and cPCI (CompactPCI) systems.

Its physical dimensions are 21.6 cm × 2.0 cm × 13.0 cm (8.5 × 0.8 × 5.1 in.), and it weighs 454 g (1 lb). Power requirements include 10 W at 5 V and 2 W at 3.3 V. The module incorporates a reliable relay type "reed" switch with rhodium contacts. It is recommended for indoor use within an ambient temperature range of 0 to 55 degrees Celsius, with storage capabilities between -40 to 70 degrees Celsius. The relative humidity rating is 5% to 85%, non-condensing, and it has a pollution degree level of 2, indicating suitability for environments with low to moderate contamination levels. The PXI-2531 can be mounted at elevations up to 2000 meters.