What does the term "hard-wired output" refer to in PLC terminology?

The term "hard-wired output" in PLC (Programmable Logic Controller) terminology refers to a physical output device that is directly connected to the PLC. This means that the output is established through physical wiring rather than being controlled by software or through a networking protocol. Hard-wired outputs are typically used to control machinery, lights, or other equipment directly.

The direct connection allows for immediate response times and reliability since the signals are transmitted through physical connections, avoiding delays that might be encountered in software-controlled outputs. Such outputs reflect configurations defined in the PLC's programming, where specific inputs can activate these outputs according to predefined logic.

Understanding hard-wired outputs is crucial for designing effective control systems because they form the backbone of many automation tasks, enabling operators to engage with the physical environment through reliable and straightforward connections.