Which items are listed for Electrics/Electronics for Input Elements?

• A. Switches, Push Buttons actuators, Limit switches, Program module, sensors, and Indicators/generators
• B. Switches only
• C. Sensors only
• D. Indicators/generators only

Answer: (A)

Input elements are devices that provide signals or data into the system. This includes human-operated controls like switches and push-button actuators, which change the input state; limit switches, which detect a mechanical position; sensors that convert physical quantities (temperature, proximity, etc.) into electrical signals; and a program module, which can supply or process input data for the control logic. Indicators and generators also belong here because indicators show the current state (feedback) and generators can provide test or reference signals to the input path. Because this option covers switches, push-buttons, limit switches, sensors, a program module, and indicators/generators, it encompasses the full range of items typically listed as input elements.