![]() ![]() Requirements and be easy to use while maintaining compatibility with standard serial communications boards. In short an application program written to support RS232 comms with no flow control can be made to interface to RS485Įach of the USB485i devices come with Windows and Mac OS compatible drivers and are designed to meet stringent performance This allows it to support two wire, half duplex communications without any need to control the RS485 transmitterĮnable from the application program. This isolation can be used in serial communications systems where high integrity data transmission and reception are required in an electrically severe environment.Īnother big advantage of the USB485i is that it can automatically enable the RS485 transmitter when data is to be transmitted. In fault conditions they are protected to sustain common mode voltages up to peaks of 1KVdc. The USB485i is designed to isolate the serial communications from the computer power. This means they will work when attached to USB 1.1, USB 2.0 or USB 3.0 ports. The devices are USB 1.1 specification full speed (12 mbits/second) compliant. Having no external power supply is a big advantage in portable and industrial applications, this is achieved by drawing all the power required by the converters from the PC's USB port. ![]()
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