4 Port RS232/422/485, software configurable VScom USB-2COM PRO Transfer Speed up to 921.6kbps RS232, up to 3Mbps RS422/RS485 Metal case DIN-Rail mountable RS232/422/485 DB9 male port Terminal block Speed up to 3000kbps External power supply Overview: Serial ports on USB allow further use of existing devices, even when the computer doesnt offer serial ports. The USB-4COM-PRO is extremely flexible in offered communication standards. The high speed serial port with the 128 byte FIFO allows high speed communication, even in heavy loaded systems. Unique features reduce the system load. The serial port also allows unusual speed settings like 500.000bps. Specifications: Serial interface: RS232/422/485 selected by software Ports: 4 Speed: up to 921.6kbps RS232, up to 3Mbps RS422/RS485 Available Modes: RS232 full duplex RS422 full duplex RS485 4 wire, full duplex RS485 2 wire, half duplex, with echo RS485 2 wire, half duplex, without echo Signals: RS232 TxD, RxD, RTS/CTS, DTR, DSR, DCD, RI, GND RS422 Tx+/-, Rx+/-, GND RS485 2 wire Data+/-, GND RS485 4 wire Tx+/-, Rx+/-, GND USB Interface: USB 2.0 Power: External power supply 5V DC Driver: Windows 98, ME, 2000, XP, 2003 Server, Vista Linux (Kernel 2.4 and up built-in) Connectors: 4 DB9 male Dimensions: 172 x 95 x 29 mm (W x L x H) 184 x 99 x 29 mm with DB9 connector and ears Ordering Information: Product Name: VScom USB-4COM PRO Packing list: . VScom USB-4COM PRO . USB cable 0,9m . CD