The National Instruments part number 777459-12 corresponds to the SCC-DO01 Isolated Digital Input Module, designed for reliable digital signal handling in industrial environments. This module offers a solitary channel output, utilizing optical isolation to ensure device protection. Capable of operating with an external voltage supply ranging from 5 to 24 VDC, it is ideal for switching applications involving transistors and solid-state relays. The SCC-DO01 features a TTL-compatible output with a maximum digital power requirement of 69 mW. Key performance metrics include a typical propagation delay of 400 µs for low to high and 300 µs for high to low transitions, alongside rise and fall times of 120 µs and 25 µs, respectively. The module dimensions are 3.50 inches by 1.15 inches by 0.73 inches, with a weight of 1.0 oz. It supports field-wiring with a diameter range of 28 to 16 AWG, and connectivity is facilitated through a 20-pin right-angle male connector and a 2-pin screw terminal for I/O. The SCC-DO01 has a maximum working voltage of 42 V, adhering to installation category 2 specifications. Optimized for operating temperatures between 0 °C and 50 °C and a relative humidity range of 10% to 90%, it can be stored in conditions ranging from -20 °C to 70 °C. This module is intended for indoor use only and should be housed in a sealed enclosure if deployed in outdoor settings. Additionally, the maximum operating altitude is 2000 m. The SCC-DO01 complies with several safety and electrical equipment standards, including IEC 61010-1, EN 61010-15, UL 3111-1, UL 6101B-1, and CAN/CSA C22.2 No. 1010.1, ensuring its suitability for measurement, control, and laboratory applications.