Which topology do Foundation Fieldbus or Profibus support?

Which topology do Foundation Fieldbus or Profibus support?

• A. Point-to-point only.
• B. Star topology with a central hub.
• C. Multi-drop topology enabling multiple devices on a single bus.
• D. Isolated devices with no shared communication.

Answer: (C)

Foundation Fieldbus and Profibus are designed around a bus topology, where many devices share a single communication medium. This multi-drop arrangement lets each device on the bus communicate without needing a separate cable to every other device, which makes wiring more efficient and scalable. Point-to-point would connect just two devices with a dedicated link, which isn’t how these networks are laid out. A star topology relies on a central hub, which isn’t how Fieldbus or Profibus typically wire devices to achieve network-wide communication. Isolated devices with no shared communication would defeat the purpose of a fieldbus, since the whole point is to coordinate multiple devices over the same medium. In practice, Foundation Fieldbus uses a two-wire trunk with device taps to support many devices on one bus, while Profibus DP uses a line/bus arrangement (such as RS-485 or fiber) that also accommodates many devices along the same communication path.

Foundation Fieldbus and Profibus are designed around a bus topology, where many devices share a single communication medium. This multi-drop arrangement lets each device on the bus communicate without needing a separate cable to every other device, which makes wiring more efficient and scalable. Point-to-point would connect just two devices with a dedicated link, which isn’t how these networks are laid out. A star topology relies on a central hub, which isn’t how Fieldbus or Profibus typically wire devices to achieve network-wide communication. Isolated devices with no shared communication would defeat the purpose of a fieldbus, since the whole point is to coordinate multiple devices over the same medium. In practice, Foundation Fieldbus uses a two-wire trunk with device taps to support many devices on one bus, while Profibus DP uses a line/bus arrangement (such as RS-485 or fiber) that also accommodates many devices along the same communication path.