Emerson 375 User Manual page 124

G-iv
HART loop
A communication network in which the master and slave device are
HART-smart or HART-compatible.
HART protocol
Highway Addressable Remote Transducer communication protocol. An
industry-standard protocol for digitally enhanced 4-20 mA communication
with Smart field devices.
HART tag
An 8-character field used to identify a device. A 32-character long tag is also
possible with HART Universal revision 6 device. This field is stored in the
HART device and can be modified.
Instantiation
Some F fieldbus devices support instantiation of function or
OUNDATION
transducer blocks in the device. This means the device allows a command to
be sent to it that will create or instantiate additional function or transducer
blocks in the device. Once instantiated, these blocks operate like any other
block in the device. The 375 Field Communicator supports the commands to
instantiate and to delete function and transducer blocks in a fieldbus device.
Internal Flash
Non-volatile memory that stores the operating system, application software,
internal device configurations, event captures, fieldbus statistics, and user
generated text files.
Intrinsic Safety
Circuits that are designed to limit the amount of energy consumed or
provided to field devices to levels below those that are required to ignite
specific types of hazardous materials under fault and no fault conditions.
Also a method of providing safe operation of electronic process-control
instrumentation in hazardous areas, such as flammable environments. IS
systems keep the available electrical energy in the system low enough that
ignition of the hazardous atmosphere cannot occur.