The National Instruments part number 781420-00 refers to the PXI-2800 PXI Carrier Module, specifically designed to accommodate SwitchBlock relay cards. This robust carrier module supports the installation of up to six SwitchBlock relay cards and occupies four PXI slots, facilitating extensive switching capabilities suitable for automated test systems with high channel counts. By linking multiple SwitchBlock relay cards via the integrated bus interface, users can create expansive configurations that allow for over 2,000 crosspoints across four slots or more than 8,000 crosspoints within a single PXI chassis.

The SwitchBlock relay cards included in this system enhance the efficiency of setting up, routing, programming, and maintaining large switching applications, featuring multiple two-wire switches for differential measurements and 16-row switches that allow for simultaneous connections. The 781420-00 Carrier Module is paired with Switch Executive switch-management software, providing users with the ability to graphically configure their switch systems, whether controlling them on a relay-by-relay basis or automating signal routing across multiple relay cards for improved functionality. The integration of Switch Executive with LabVIEW framework-design software streamlines the configuration, programming, and maintenance of intricate matrix setups.

Moreover, the modularity of the SwitchBlock Carrier allows for the combination of up to four units, potentially yielding a total of 8,832 internally routed crosspoints within a single PXI chassis. This capability is essential for applications that demand considerable and adaptable switching options in automated testing environments. The PXI-2800 module comes with a maximum current rating of 2 A and accommodates input voltages up to 150 V, CAT 1, with power requirements of 5 W at 3.3 V and 20 W at 5 V. It features dimensions of 7.4 x 3.2 x 5.1 inches and weighs 1 lb, 4 oz.