RS422/485 to USB Serial Adapter with Isolation and Surge Protection It is an intelligent expansion module that connects to a PC or server via the Universal Serial Bus (USB), providing high-speed serial connectivity. The RS485 port supports Auto-Transceiver-Turn-Around feature to support any kind of application software controlling the transmitter driver. With its complete software kit, it is an ideal solution for most critical applications. Features: Provides one RS422/485 Port over USB Port Supports 4-wire RS-422 and 2-wire RS-485 applications Supports RS-485 Auto Transceiver Turn Around by Unique Featured ATTATM Hardware Supports USB Bus Power RS422/485 Baud Rate up to 921.6Kbps USB1.1 and USB2.0 Backward Compatible Supports DB9-Male and Terminal Block Connector Supports 2500Vrms Optical Isolation and Surge Protection Metal Case and Optional DIN RAIL Kit for Critical Applications Supports Win98S, ME, 2000, XP, 2003, Vista, Linux RS485 User: Since the factory settings are initially set at 2-wire RS485 mode. There is no need to change any switch settings from the default settings. RS422 User: Change the mode pin to ¡§422¡¨ positions(ON). Keep the other settings unchanged. Switch Description: Switch Pin# Switch Name (Switch States) Switch Positions Description 1 485/422 (OFF/ON) 485 (Default) 2-wire RS485 mode 422 4-wire RS422 mode 2 ECHO/NO ECHO (OFF/ON) ECHO Transmitting data will be echoed back NO ECHO (Default) No echo data 3 NO TERM/TERM (OFF/ON) NO TERM (Default) Termination Resistor is Disabled TERM Termination Resistor is Enabled 4 RVD (OFF) Reserved for Future Use (ON) Reserved for Future Use Please note that if the mode were set at ¡§422¡¨ mode, the ECHO setting will take no effect. The Echo mode is useful for the application program to detect if the RS485 bus were in a collision. If the echoed data was not equal to the transmitted data, then the bus was in a collision. The RS422/485 Adapter Cable can be hot-plugged to the USB port of your computer due to the specifications of USB. It supports the following operating systems. The drivers are shipped in the corresponding folder on the supplied driver CD. If you are installing drivers for Win98, ME, 2000, 2003, XP or Vista, when prompted for the location of the drivers, specify your CD-ROM drive and the locations according to the following folder list: Type Specifications Connectors Number of Ports RS422 Signals RS485 Signals (2-wire) Baud Rate Data Bits Stop Bits Parity Isolation Surge Protection Power Requirement Operating Temperature Operating Humidity Storage Temperature USB type-A, DB9 Male 1 RS422/485 (for DB9M or Terminal Blocks) TXD+, TXD-, RXD+, RXD-, GND DATA+, DATA-, GND 300 bps to 921.6Kbps 7,8 1, 2 None, Even, Odd, Mark, Space 2500Vrms 500Watts 5V/200mA (USB Bus Powered) 0 to 55aC(32 to 132aF) 5 to 95% RH -20 to 85aC (-4 to 185aF)
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