Abstract: The capital function of the remote terminal unit (RTU) is data acquisition, storage, and transmission. This paper took the STC12C5A60S2 microcontroller as the master chip and designed an RTU hardware system that could be applied to a multi-environment collection terminal. It proposed a block diagram of the RTU hardware composition and developed related modules such as analog-to-digital conversion, memory, communication, input and output, motor drive, etc. The test result shows that this system realizes many functions of RTU, for example, multi-channel data acquisition, communication, drive control, etc. It could solve problems of the single function, low-level efficiency, poor technical development, and poor scalability in the early RTU system. This system applies in many aspects.
Key words: remote terminal unit (RTU); hardware system; environment acquisition terminal; multi-channel data acquisition
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