I know this has come up before, but no-one seemed to know the answer then. Problem is as follows: I have an APC Back-UPS 650 and a CD with PowerChute v.5.0.2. So far so good. PowerChute tells me the ...

While the RS-232, RS-422, and RS-485 serial standards are hardly new, combining them over a single connector creates challenges unforeseen when these standards were first drafted years ago.

The easiest way to connect computer peripherals is through a Universal Serial Bus (USB). The USB is a plug-and-play interface between the PC and the peripherals. The main advantage of USB is that the ...