Adapter for an automation field device

An adapter for an automation field device, comprising:

• a first communications interface which is designed for linking to a Highway Addressable Remote Transducer (HART) or 4-20 milliamp (mA) communications loop connected to the automation field device;
• a second communications interface which is designed for linking to a Foundation Fieldbus or Profibus PA Fieldbus based upon Manchester Bus Powered transmission technology;
• an electronics unit with operating software executed by the electronics unit, wherein the operating software instructs the electronics unit to convert HART or 4-20 mA telegrams sent by the field device and incoming at the first communications interface into Foundation Fieldbus- or Profibus PA-compatible telegrams and to output the Foundation Fieldbus- or Profibus PA-compatible telegrams via the second communications interface, and/or to convert Foundation Fieldbus or Profibus PA telegrams incoming at the second communications interface into the HART- or 4-20 mA-compatible telegrams and to output the HART- or 4-20 mA-compatible telegrams to the automation field device via the first communications interface;
• and
• a power supply unit which is designed to tap electrical energy from the Foundation Fieldbus or Profibus Fieldbus via the second communications interface and to supply the adapter with electrical energy required for its operation.