The National Instruments TB-12399 Terminal Block (Part Number: 786446-01) is a specialized accessory designed for seamless integration with the SLSC (Switch, Load, and Signal Connection) modules, specifically the SLSC-12252. Built to handle signals of less than 33 VDC, the TB-12399 features a robust 44-pin female high-density D-SUB connector and includes both an 8-pin male Positronic Scorpion connector and an 8-pin Positronic Weidmuller LUFS connector for versatile connectivity options. The terminal block is versatile in mounting configurations, allowing for both DIN rail and rear panel mounting via M4 x 0.7 threaded holes. It facilitates low current sense connections to the SLSC-12201 module through the HD44 connector J4. Although the TB-12399 has been marked as obsolete by National Instruments, it remains available for purchase and repair through Apex Waves, ensuring continued support and service. Additionally, comprehensive user and maintenance manuals are available for download, alongside a warranty period of 2-3 years for added assurance. For pricing details, please contact a sales representative directly.