The National Instruments PCI-232/4 (Part Number: 777642-04) is a robust 4-port RS-232 serial interface card designed for seamless communication with various devices and instruments. With a maximum transfer rate of 115.2 Kbps and a 64-byte FIFO buffer, this PCI card features a 10-position jack, facilitating efficient data transmission. Variants of this model include 2-port, 8-port, and 16-port configurations, each outfitted with distinct I/O connectors: the 2-port version utilizes a DB-9 connector, the 8-port model employs a SCSI 68-pin interface, and the 16-port option includes a SCSI 100-pin female connector.

The PCI-232/4 is engineered for asynchronous communication with Windows-based systems, incorporating plug-and-play functionality for straightforward installation and configuration. It is compatible with major software environments, including NI LabVIEW, Measurement Studio, and LabWindows/CVI, enabling effortless integration into existing applications. This module supports dual PCI bus architectures (32-bit and 64-bit) and accommodates both 3.3V and 5V connector keys. Its operational range spans 10% to 90% relative humidity, making it suitable for various industrial environments.

Users can enhance their setup by purchasing additional cables to adapt the phone jacks to either DB-9 or DB-25 male connectors, although it is important to note that no converter cables should be used for distances exceeding direct connections to instruments. While the PCI-232/4 has been classified as obsolete, it remains available for purchase and repair through Apex Waves. For further information, including technical specifications and a user manual, please refer to the National Instruments documentation or contact a sales representative for pricing and quotes.