The National Instruments SWB-2811 Matrix Module (part numbers 781421-11 and 781420-11) is a versatile 1 A, 8 x 21 Reed Matrix Module specifically designed for integration with National Instruments SwitchBlocks. Engineered for high-power applications, the SWB-2811 serves not only as a standalone relay card but can also be easily expanded within a single PXI chassis or carrier, allowing for flexible signal routing among multiple inputs and outputs. This module excels in routing signals from data measurement and management systems, arbitrary waveform generators, power supplies, and oscilloscopes to various test points on a unit under test (UUT). The SWB-2811 facilitates simplified wiring with its reliable 1-wire configuration, comprising eight rows and twenty-one columns. It supports a maximum switching voltage of 150 V and a maximum switching current of 1 A per channel. The module utilizes high-quality reed relays that ensure dependable and fast switching operations, maintaining performance regardless of switching frequency and loads. While capable of driving up to 176 reed relays simultaneously, it is important to note that actuating multiple relays may affect the relay's response time. The SWB-2811 requires a PXI carrier module for operation, as it is not intended to function as a standalone device. This compact module measures 4.4 inches by 0.5 inches by 6.7 inches and weighs 8.5 ounces, accompanied by a 2-3 year warranty. User and maintenance manuals for the SWB-2811 are available for download, and pricing is available upon inquiry with a sales representative.