Which statement best describes the role of PLC input modules?

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Multiple Choice

Which statement best describes the role of PLC input modules?

PLC input modules act as the interface to the outside world by sensing signals from field devices and turning them into data the PLC can process. They handle digital on/off signals from switches and sensors as well as analog signals that may be scaled for the PLC. They don’t generate outputs to actuators—that’s the job of the output modules. They also don’t store the program—the CPU and memory manage the program—and they don’t convert mechanical energy to electrical energy—the sensor or transducer does that, while the input module merely accepts its electrical signal. So, the core idea is: input modules sense signals from field devices.

PLC input modules act as the interface to the outside world by sensing signals from field devices and turning them into data the PLC can process. They handle digital on/off signals from switches and sensors as well as analog signals that may be scaled for the PLC. They don’t generate outputs to actuators—that’s the job of the output modules. They also don’t store the program—the CPU and memory manage the program—and they don’t convert mechanical energy to electrical energy—the sensor or transducer does that, while the input module merely accepts its electrical signal. So, the core idea is: input modules sense signals from field devices.

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