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.

FEATURES

Performance parameter

▪ PCI Specification Revision 2.1 compliant

▪ Compliant with RS485 RS422 standard.

▪ RS422 Signal: T/R+, T/R-, RXD+, RXD, GND

▪ RS485 signal: T/R+, T/R, GND

▪ Working mode: asynchronous working, point-to-point or point-to-more, full duplex  4-line, half duplex 2-line

▪ Support for the free switching RS485.RS422 mode,RS422/485 end transmission distance can reach 1200 meters(9600bps)

▪ Band Rate: 75-128000bps, automatically detects serial signal rate

▪ load capacity: support to more each converter allows connecting 32 RS422 interface RS485 or equipment

▪ Transmission range: 1200meter of RS422/485

▪ Each serial signal for an additional TVS transient diode, which can prevent the following 400W surge signal crosstalk, improve communication stability.

▪ Builit-in photoelectric isolation and DC-DC voltage converter, can effectively isolate the outside pressure, to avoid the impact of equipment.

▪ Interface: DB9 Male

▪ Transmission media: twisted-pair or shielded wire

▪ Transmission rate: 38400bps at 600M

                                 9600bps at 1.2KM

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 and utilization

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-9P, 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 - .