The PCI-1612B-DE with Interface Modules 4-port RS-232/422/485 PCI Comm. Card w/S is an industrial grade plug-in card manufactured by Advantech. It is designed to provide reliable communication between devices through its four serial ports. The card has a robust RS-232/422/485 interface for serial communication, and all four ports provide full signal support with RS-232, RS-422, and RS-485 signal modes. It is also equipped with a variety of features to maximize performance, such as 15KV ESD, 25KV EOS and 2KV EFT protection, and is designed to meet EN61000-4-2 and EN61000-4-3 electromagnetic compatibility (EMC) and EMC immunity requirements. The card has an auto flow control for data transmission, and supports both transmit and receive FIFOs for fast data throughput. The PCI-1612B-DE is a reliable and efficient card, ideal for use in industrial automation, process control, and network equipment applications.