The TTC DAU - CDAU and EDAU Series are designed to condition and encode multiple sources of analog and digital data including sensors, transducers, buses, electro-mechanical assemblies (switches, relays), computer interfaces, or virtually any other source that needs to be measured. They feature a fixed chassis size with space to accommodate up to 16 modules.

A single TTC DAU can be used in applications that range from just a few input channels up to hundreds of input channels. Channel capacity can be increased by adding more cards in the chassis, or by interconnecting more units as remote units.

https://www.curtisswrightds.com/products/flight-test/data-acquisition/ttcdau/