The Comtrol 5300007 PCI RS422 Quad DB9 4-Port 32-Bit ASI is a PCI expansion card that provides four RS422 serial ports via standard DB9 connectors. It uses a 32-bit PCI interface to support four independent serial channels on a single card. Designed for ASI applications requiring multiple differential serial connections, this quad-port card consolidates four RS422 ports on one PCI board.
