Signalling and communicationQuestion 128 of 1506

Which network was first implemented by Modicon to link remote I/O racks with a PLC processor?

  1. Profibus
  2. Modbus
  3. Bluetooth
  4. FireWire
Show answer

Correct answer: Modbus

Profibus came from Siemens.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 14.2: Networks and Busses

Practice signalling and communication

Questions last reviewed: 18 October 2026