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List of certified devices |
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Certification checks that the device model (DTM) adheres to the FDT specification and that it will be interoperable with other certified DTMs. This ensures a smooth project implementation, with minimal trouble and gives the end user the freedom to choose devices that provide maximum plant assets efficiency without being restricted by system integration constraints.
The FDT/DTM specification provides an interface between the host system (frame application) and the device model (DTM). In FDT/DTM technology, one DTM may support several device types and one device may be supported by several DTMs. A single DTM may support a pressure transmitter as well as several versions of a temperature transmitter (generic HART DTM) or one flow transmitter may be supported by two different DTMs for example, Basic and Advanced diagnostic versions. FDT standards require that DTMs be certified to ensure conformity to the specification. However the devices do not require FDT certification. Device (types) specifics are included or "wrapped" in the DTM. This is why, as of November 2007, there are about 68 certified DTMs supporting over 600 device types.
So, the FDT/DTM approach provides significant advantages for the device supplier while preserving for the end user all the quality and reliability of the rigorous certification process. |
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