The National Instruments part number 777987-01 designates the PXI-2590 PXI Multiplexer Switch Module, engineered for high-performance switching in automation applications. This module operates in a 4 x 1 multiplexer configuration, featuring a nominal characteristic impedance of 50 Ω to ensure optimal RF performance. Key specifications include a propagation delay of less than 3 ns and a rise time under 300 ps, making it suitable for time-sensitive tasks. The module supports a maximum switching voltage of 24 V, a maximum switching current of 1 A, and a maximum power rating of 24 W, while the RF carry power is capped at 10 W up to 900 MHz. Its initial DC path resistance is less than 0.1 Ω, transitioning to greater than 1 Ω by the end of the relay’s operational life. The 777987-01 is built with electromechanical, non-latching relays composed of gold-clad silver contacts, ensuring durability with an expected mechanical life of 5 million cycles and 100,000 electrical cycles at maximum load. The relay's operate and release time is consistently 15 ms at 20 °C, and it utilizes five SMB jacks for I/O connectivity. The physical dimensions of the module are 0.8 in. x 3.9 in. x 6.3 in. with a lightweight design of 8.5 oz. It operates effectively within a temperature range of 0 °C to 50 °C and can be stored between –20 °C to 70 °C, with tolerable humidity levels of 5% to 85% non-condensing. Compliance with IEC 61010-1, EN 61010-1, UL 3111-1, UL 61010B-1, and CAN/CSA C22.2 No. 1010.1 ensures that this module meets essential safety standards for electrical measurement and control applications. To maintain electromagnetic compatibility, the use of shielded cabling is required, and caution is advised against using this module for RF signal switching to prevent damage from unterminated channels during relay actuation.