Advantech PCI-1603 2-port isolated RS-232/current loop PCI communication card is a current loop serial communication card that provides multiple interface options. You can configure it as a commonly used RS-232 or noise resistant current loop communication method using a 16PCI952 UART with a 128 byte FIFO buffer, which can provide high-speed and reliable communication, especially in multitasking environments such as the Windows operating system. It provides 2 isolated RS-232 or current loop serial ports that can be configured as RS-232 or current loop ports using jumper wires on the card