PCI MCS9865 Dual RS422/RS485 Convertor Card

Overview

PCI to RS422/RS485 Convertor is a universal converter of PCI to RS485/RS422, which is without addition power supply, compatible with PCI, RS422, RS485 standards. It can convert PCI signals to a balanced differential RS422 or RS485 signals. Each line has surge protection, and various surge voltage protections. The tiny capacitance distance guarantees RS422 / RS485 interface of high-speed transmission. RS422, RS485 connect by RJ45 and DB9 interface. Converter with zero delay automatic transceiver inside, unique I/O circuit automatically control data flow direction, without any handshake signals (such as RTS, DTR,etc.) and jumpers set realize full-duplex, half-duplex mode conversion, plug and play. Ensure the product fix for all existing communication software and hardware interface.

Function

PCI TO RS422/RS485 convertor supports four communication modes: 

1. Point-to-point / 4-line full-duplex

2. Point-to-multi point / 4-line full-duplex

3. Point-to-point / 2-line half-duplex

4. Point-to-multi point / 2-line half-duplex

When the convertor is working at full-duplex or half-duplex, 

needs to add a matched resistance to avoid reflects and disturbance of signal. ( 120Ω , 1/4W )

Hardware Installation

Please read carefully product manual before install PCI to RS422/RS485 converter, then insert PCI Card which attached to USB port. This product use USB/DB - 9, general connectors for input/output interface without jumpers, automatically identify RS422 or RS485 communication mode. Fit for twisted-pair cable or shielding wire connection, very convenient to disassemble. Point-to-point, point to more, full-duplex communication that connect four wire T/R +, T/R - and RXD +, RXD -, point-to-point, point to more, half-duplex communication that connect two lines T/R +, T/R -.