The 40-523-021 is a 44x4 high density 1-pole reed relay matrix. Other available reed relay formats are 2-pole and 1-pole screened. The screened version is suitable for switching signals up to 50MHz. Model 40-524 is a similar matrix, available in single pole 46x4 format. Typical applications include signal routing in Functional ATE and data acquisition systems. These PXI matrix cards are constructed using high reliability Ruthenium Electro-Plated Reed Relays, offering >10e8 operations to give maximum switching confidence with long life and stable contact resistance. Larger matrices may be constructed by daisy chaining the common signals from multiple modules. However, for applications that require a very large matrix, Pickering s BRIC modules are best suited.