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This overview explores the discrete input/output (I/O) systems in personal computers, focusing on the types of rack enclosures used in programming devices. We categorize the racks into master, local, and remote, explaining their various applications. Additionally, we delve into input and output types including AC/DC inputs, TTL inputs, and discrete outputs, emphasizing their roles in system control and functionality. Understanding these components and their arrangement is crucial for effective hardware integration and programming in computing environments.
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PROGRAMMING DEVICES • miniprogrammers • personal computers
THE DISCRETEINPUT/OUTPUT SYSTEM • Generally speaking, there are three categories of rack enclosures: • master racks • local racks • remote racks