The RS485 converters have big advantages over traditional methods of accessing RS485 networks from PCs. The converters take their power from the USB port and therefore require no external power supply, a big advantage in portable and industrial applications. The USB485i is fully opto-isolated giving valuable protection to the PC in harsh environments. Another big advantage of the USB485 is that it automatically enables the RS485 transmitter when data is to be transmitted. This allows it to support two wire, half duplex communications without any need to control the RS485 transmitter enable from the application program. In short an application program written to support RS232 comms with no flow control can be made to interface to RS485 without modification.
Specifications :
Full specification signal levels
Implementation of all RS-232 primary control lines
Low power consumption
Features :
RS485 transmitter enabled automatically in Half Duplex mode
Full Duplex, Half Duplex, Multi-drop applications
Industry standard panel mounted connectors
Three point isolated serial communications on isolated versions
FIFO modes supporting a 384 character receive buffer and 128 byte transmit buffers.
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