Emerson 375 User Manual page 106

G-ii
Device Description (DD)
A set of instructions written in the HART or F fieldbus
OUNDATION
Device Description Language that defines the parameters and
commands and methods that a host application uses to communicate
with a HART or F fieldbus field device.
OUNDATION
DDL
Device Description Language. A specialized programming language
used to write Device Descriptions for HART or F fieldbus
OUNDATION
-compatible field devices. See also Device Description.
Expansion Module (EM)
An optional removable memory card that snaps into the Expansion
Port on the side of the 375 Field Communicator. See ordering
information for availability types.
Field device
Field devices may generate or receive an analog signal in addition to
the HART digital communication signal.
Fieldbus Foundation
The organization that develops and supports F fieldbus,
OUNDATION
an international, interoperable standard for communication of process
automation and control information. Members include suppliers and
end users of process control and manufacturing automation products.
Support for the standard includes education, interoperability and
conformance testing, testing tools, and development software.
F fieldbus
OUNDATION
A specific fieldbus technology developed and supported by Emerson
Process Management and the other members of the independent
Fieldbus Foundation. Foundation Fieldbus technology uses Device
Descriptions and function blocks to enable intelligent field devices to
execute control functions traditionally performed by a distributed
control system.