(TCO 7) A single output device has failed while the remainder of the PLC system is functioning normally. The indicator light on the output module indicates that a signal is being sent to the output point where the device is connected. Technician A says you would next trace the circuit back through the logic to locate the input(s). Technician B says you would next check the point where the output device's field wiring is connected to the output rack. Who is correct

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Answer:

Technician B is correct

Explanation:

In a PLC system, a single output device has malfunctioned and we want to figure out exactly where is that output device is connected. Since the output module indicates that a signal is being sent to the output point where the device is connected then we should check the PLC output rack to locate the point exactly where is the output device is connected. Therefore, technician B seems to be correct here as compared to technician A whose suggestion seems to be more complex and time consuming.