The National Instruments NI-9966 Terminal Block Plug is an essential connectivity solution designed for use with C Series I/O systems. This 24-pin connector features a male COMBICON to female spring terminal configuration, making it ideal for direct connections to any 24-position C Series module equipped with spring terminals. The NI-9966 facilitates efficient data transfer and seamless integration, enhancing overall system performance while significantly simplifying wiring processes for multiple devices. Each unit includes a single spring terminal connector, serving as either a replacement part or a means to reduce wiring complexity across various applications. The terminal block plug is designed to improve usability and ensure safety through its incorporated operator protection and strain relief features. Specifically catering to D-SUB modules, the NI-9966 provides a reliable solution for front-mounted terminal blocks and cabling connections. Furthermore, the product is compatible with a range of terminal types, including D-SUB, spring, and screw terminal modules, addressing diverse wiring needs and configuration requirements. Built with robust materials, the NI-9966 promises durability and consistent performance in demanding industrial environments. For professionals engaging with C Series I/O systems, the NI-9966 Terminal Block Plug is an indispensable tool that guarantees longevity and dependable operation.