1.1 Functional Description
The USB-COM-Plus modules are a family of communication devices. This model, USB-COM485-Plus1, provides a simple method of adapting legacy serial devices with RS485 interfaces to modern USB ports. This is accomplished by incorporating the industry standard FTDI FT232R USB-Serial bridge chip.
The integrated electronics of the USB-COM485-PLUS1 utilise the FTDI FT232R and includes RS485 level shifters plus TXD/RXD LEDs to provide a visual indication of data traffic through the module.
1.4 Features Adds one RS-485 serial port by connecting to USB Easy plug & play installation and RS-485 device connection Works with USB 1.1 & 2.0 Host and Hub ports Industry Standard FTDI chip set & device drivers for maximum compatibility Microsoft Windows® WHQL-certified, Mac OS X, Linux and Windows CE device drivers Installs as a standard Windows COM port COM port number can be changed to any available COM port number, to support HyperTerminal, or any other serial communications software application running in Windows Supports Windows Server 2008, 2003, Vista, XP, 2000, Linux, Mac OS X FIFO: 128 byte transmit buffer, 256 byte receive buffer RS-485 data signals: Data+, Data-, GND Option to enable or disable local echo Powered by USB port. No external power adapter required. Pin 9 of DE-9P can provide +5VDC output at 250mA. Serial port speed up to 3Mbps Serial Communication Parameters
o Parity: None, Even, Odd
o Data bits: 7, 8
o Flow control: None One DE-9P male connector LEDs indicate USB Enumeration, RxD, TxD for monitoring port status & easy diagnostics Operating temperature of -40°C to +85°C