National Instruments 778979-01 Serial Interface Device 

National Instruments part number 778979-01 is an identifying part number for the PCI-8430/4 Serial Interface Device. The NI 778979-01 interface features multiprocessor and hyper-threading capabilities, leveraging advanced PC technology for increased speed and efficiency. It includes device programming integrated into the instrument with excellent resource allocation and DMA access for high throughput with minimal CPU usage. This model also introduces new memory-mapping highlights, enhancing compatibility with a wide range of serial devices. The 778979-01 is a universal PCI board compatible with both 5V and 3.3V signaling environments, ensuring operation across various computer setups. 

It offers 4 serial ports, supports high-performance DMA transfers, and utilizes the RS232 serial protocol. This model includes a design feature enabling users to customize the IP address server for the instrument and efficiently expose all additional slots to the operating system via a basic Microsoft Windows Serial port interface. All NI serial ports are configurable using NI-VISA, which offers a higher-level abstraction layer for programming serial, GPIB, TCP/IP, and USB instruments. NI-VISA ensures compatibility and future-proofing for software development as instrument interface requirements evolve. 

Additionally, NI-Serial is a certified Windows driver, allowing users to install additional serial ports without user interaction or disruptive pop-up windows. The NI 778979-01 interface module features a DB-9 male connector for I/O connectivity. It supports a maximum baud rate of 1 Mbps. The board is capable of accommodating any baud rate ranging from 2 baud up to its maximum limit, providing flexibility for various communication speed requirements in serial data transmission applications.