| 摘要 |
A controller system with programmable bi-directional input/output terminals includes a micro controller, a terminal block and an interface unit connected between the micro controller and the terminal block. The interface unit includes a predetermined number of uni-directional input terminals, a predetermined number of uni-directional output terminals, and a predetermined number of bi-directional terminals. The micro controller can selectively set the bi-direction terminals as input terminals or output terminals according to an ID signal from the interface unit or a user parameter. Therefore, the number of input/output terminals for the controller system can be flexibly adjusted.
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