The USB2-H-5004, 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 FT4232H USB-Serial bridge chip.
Each USB2-H-5004 adapter contains a small internal electronic circuit board which utilises the FTDI FT4232H, mounted inside a rugged plastic enclosure capable of withstanding industrial temperature ranges. The integrated electronics also include RS485 level shifters and TXD/RXD LEDs to provide a visual indication of data traffic through the adapter.
Flexible mounting allows the USB2-H-5004 to be used in a variety of applications, from a portable adapter to accompany a laptop to permanent installations in industrial, commercial and retail locations.
The enclosure incorporates a standard USB-Mini-B client connector for connection to an upstream host or hub port. RS485-level signals, are available on an industry-standard DE-9P (DB9) connector. The maximum RS485-level data rate is 10 Mbps.
The USB2-H-5004 adapter require USB device drivers, available free from http://www.easysync-ltd.com, which are used to make the USB2-H-5004 appear as a Virtual COM Port (VCP). This allows existing serial communications software, such as HyperTerminal, to exchange data through the USB2-H-5004 to a legacy RS485 peripheral device.
Pin 9 of the D-sub connector can provide +5 V power output with maximum 250 mA (sum of all current drawn on all 4 interfaces).
· Adds dual RS485 serial port by connecting to a USB 2.0 Hi-Speed interface. · Echo and non-Echo modes selection. · Easy plug & play installation and RS485 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 downloadable for free · Installs as a standard Windows COM port · COM Port Number assignment is configurable · FIFO: 2k byte transmit buffer, 2k byte receive buffer · RS485 data signals: Data+, Data-, GND · Powered by USB port. No external power adapter required. · Pin 9 of DE-9P (DB9) can provide +5 VDC output at 250 mA (total on 4 ports) · Serial port speed up to 8Mbps · Serial Communication Parameters o Parity: None, Even, Odd o Data bits: 7, 8 o Flow control: X-ON/X-OFF, None · Dual DE-9P (DB9) male connector · LEDs indicate USB Enumeration, RxD, TxD for monitoring port status & easy diagnostics · Operating temperature of -40°C to +85°C · USB cable of 0.9 meter included · FCC and CE approved.