The NI BNC-2090A is a shielded, 1U, 19 in. rack-mountable connector block with 22 signal-labeled BNC connectors to simplify connections to I/O signals on NI data acquisition (DAQ) devices. The BNC-2090A is compatible with any 68-pin NI X Series (connectors 0 and 1), M Series (connectors 0 and 1), E Series, S Series, or B Series DAQ devices. It provides BNC connections to all analog I/O, analog and digital triggers, clocks for synchronization purposes, and two user-defined signals. Digital I/O signal connectivity is provided through 29 spring terminals. The BNC-2090A also includes easily accessible space where you can build custom signal conditioning circuitry such as lowpass filters, highpass filters, and voltage dividers (attenuators).