The National Instruments PXI-2590 is a high-performance 4-Channel Multiplexer Switch Module designed for automated measurement applications. With a bandwidth of 1.3 GHz, this module efficiently switches signals across a frequency range from DC up to 1.3 GHz with a characteristic impedance of 50 Ω. It utilizes electromechanical, non-latching relays that offer a typical operating and release time of 15 ms, ensuring quick signal switching. These relays are made of gold-clad silver for superior contact performance and are rated for 5,000,000 mechanical cycles and 100,000 electrical cycles. The PXI-2590 supports a maximum switching voltage of 24 V and can handle up to 1 A of switching and carry current, with a maximum switching power of 24 Watts.

Trigger signals for the PXI-2590 can be received via PXI trigger lines 0-7 and STAR with a minimum pulse width of 70 ns, while output trigger signals at 1 µs can be delivered through the same lines. The module is equipped with five SMB jacks for I/O connections. Physically, it weighs 245 g and measures 3 cm × 10 cm × 16 cm. It is intended for use within an operational temperature range of 0 °C to 50 °C and can be stored in temperatures from -20 °C to 70 °C, under non-condensing relative humidity conditions of 5% to 85%. The PXI-2590 complies with major electrical safety standards including IEC 61010-1 and UL 61010B-1, ensuring reliability and safety in its applications. Though the product is marked as obsolete, it remains available for purchase and repair through Apex Waves. The module is compatible with NI-SWITCH driver software and integrates seamlessly with application development environments such as LabVIEW and LabWindows/CVI.