The National Instruments BNC-2121 Terminal Block is specifically designed to ensure efficient connectivity with NI-660X counter devices. This essential accessory facilitates rapid and reliable connections, streamlining the testing of various functions and features of the NI-660X. It utilizes a 68-position cable for connections, linking the terminal block to the I/O connector of the counter device. Distinguished by its dual connectivity options, the BNC-2121 features both BNC connectors and screw terminals for signal access.

It offers two main functionality areas, encompassing user-defined functions and Programmable Function Interface (PFI) lines, which include bidirectional spring terminals and BNC connectors. Each digital I/O is equipped with an LED indicator to provide real-time feedback on its operational status. The terminal block supports six output spring terminals, six user-defined BNC connectors, and six user-defined bidirectional spring terminals, with internal mapping to facilitate integration.

To enhance performance, the BNC-2121 comes equipped with an integrated low-pass filter to reduce output glitches, ensuring a stable trigger signal. This terminal block also supports quadrature encoders with two dedicated spring terminals and can generate up to 24 pulses per encoder revolution. The built-in function generator produces TTL-compatible square waves, making it an adaptable solution for various applications. For further details, the BNC-2121 includes user and maintenance manuals available for download, along with a three-year warranty. For pricing information, please contact a sales representative.