In PLC terminology, an internal output does not directly control an external field device. This statement is:

• A. True
• B. False
• C. Sometimes true
• D. Depends on the PLC model

Answer: (A)

Internal outputs are signals stored and used inside the PLC's logic, not actual switches that power field devices. The external device is energized by the physical output channel in the output module, which is what provides the current to the field device. So, an internal output does not directly drive external hardware; the action is performed through the output module that interfaces with the field device. This is why the statement is true.