Analog devices connected using a current loop analog signal are connected in what?

• A. Series
• B. Parallel
• C. Star
• D. Mesh

Answer: (A)

In a current loop, the signal is carried by a single current path, so the same current must flow through every device in the loop. Analog devices using a current loop (like 4-20 mA) are connected in series along one continuous loop. The transmitter sets a current that flows through all devices, and each device uses that same current while presenting its own voltage drop. This helps the signal stay consistent over long distances and through multiple devices.

If they were connected in parallel, the current would split among devices, which would mean different devices could see different currents and the signal would not be uniform. The other topology terms don’t fit this setup because they describe network layouts, not a single current path for a loop signal.