The Allen-Bradley/Rockwell Automation 170977 Discrete Adapter Board serves as a versatile component for the Allen-Bradley Bulletin 1395 digital DC drives. These drives, distinguished by their advanced microprocessor technology, offer features such as basic I/O, open chassis construction, fused AC input, and DC contactor, along with programmable functions for acceleration, deceleration, preset speeds, and current limits. Engineered for safety and performance, they provide protections against overcurrents, overloads, and power losses, with options for regenerative or non-regenerative configurations spanning 1 to 600 Horsepower. The 170977 board enhances functionality by providing 4 digital inputs at 120 Volts AC, 2 digital outputs of the contact type at 125 Volts AC, and analog I/O at +/– 10 Volts DC. Additionally, it offers 24 Volts DC digital I/O, ensuring seamless integration with existing systems, and is specifically designed to facilitate compatibility across different voltage requirements.