There are NO drivers needed or even provided by BlackBox for this device. It simply uses hardware circuits to convert an RS232 signal to a RS 422/485 signal. My first reaction to this question is: Do you have your PC serial port at 9600baud which is the default RS232 signalling rate for this device? (I guess I probably won't hear a response on this as the question is almost a year old, with no attempts by anyone to solve it. I'm the only glutton for punishment.) ZT3000 "Beta tester of "0"s and "1's"
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