The XR17V358 series Multi-I/O PCI-Express controller cards are the high performance RS-232 serial interface controller for home and industrial users. They are compatible with industrial standard 16C550 UART, which provide a low cost connection platform for industrial machines, POS machines, external modems, mice, etc. - Exar Chipset: XR17V358 - PCIe 2.0 Gen 1 compliant - x1 Link, dual simplex, 2.5Gbps in each direction - Supports x1, x2, x4, x8, x16 PCIe Bus connector keys - RS485 signals: - DATA+ (B) ○DATA- (A) ○GND - RS422 signals: - ○T/R+ ○T/R- ○RXD+ ○RXD- ○GND - 600W surge protection, 15KV ESD protection for serial ports - Working mode: asynchronous working, point-to-point to point-to-multipoint 2 wires (half duplex) 4 wires (full duplex) - Transmission distance: RS-485/422 port:1.2km (300bps-921600bps) - Transmission media: twisted-pair cable or shielded cable - Interface protection: 600W surge proteection, 15 kV ESD protection for all serial ports - 2500Vrms magnetic coupling isolation voltage protection - High common-mode transient immunity: - 25KV / us - 1000 V DCDC power supply isolation module protection - Direction Control - UART interface support for 7 or 8 data bits, 1 or 2 stop bits and even/odd/mark/space/none - Flow control none, hardware and xon/xoff - Load capability supports point-to-multipoint transmission. Each converter can connect 32 RS-422 or RS-485 interface equipment