Glossary - Emerson AMS Trex User Manual

Glossary

Activation
Ammeter
Burst mode
Commissioned device A device that has been set up to communicate with a host system. This usually
Communication
module
Data Link Time
Device
Device
Communicator
communication
module
Device
Communicator Plus
communication
module
Device description
(DD)
Externally-powered
device
Externally-powered
loop
FOUNDATION
fieldbus
FOUNDATION
fieldbus device
FOUNDATION
fieldbus Power Plug
User Guide
Activation updates the Trex unit with any needed licenses and enables the full
functionality of the Trex unit. Activation also associates the Trex unit and its
attached Trex modules with a user account/company.
The mA terminals on the Device Communicator Plus communication module that
enable the Trex unit to measure current on a 4-20 mA current loop. The HART +
pwr terminals can also measure current.
A communication mode in a HART transmitter to send data at regular intervals.
includes assigning a permanent address to the device.
Some operations on the Trex unit are disabled for commissioned devices because
they could cause process disruption.
A term to refer to either the Device Communicator communication module or the
Device Communicator Plus communication module.
A network-wide time that is periodically distributed by the LAS to synchronize all
device clocks on the bus.
See HART device or FOUNDATION fieldbus device.
A communication module you can attach to the Trex unit. This module has
terminals that enable the Trex unit to communicate with HART and FOUNDATION
fieldbus devices.
A communication module you can attach to the Trex unit. This module has
terminals that enable the Trex unit to communicate with HART and FOUNDATION
fieldbus devices, power a HART or FOUNDATION fieldbus device, and measure
current on a 4-20 mA current loop.
A set of instructions written in the HART or FOUNDATION fieldbus Device
Description Language that defines the parameters, commands, and methods that
a host application uses to communicate with a HART or FOUNDATION fieldbus
device.
A HART or FOUNDATION fieldbus device that is powered by a power supply or
digital control system. The Trex unit is not powering the device, loop, or fieldbus
segment.
A HART or 4-20 mA current loop that is powered by a power-supply or digital
control system. The Trex unit is not powering the loop.
FOUNDATION fieldbus technology uses device descriptions and function blocks to
enable intelligent devices to execute control functions traditionally performed by a
distributed control system.
A device that communicates information using the fieldbus protocol on a digital,
serial, multidrop data bus.
A connector with two banana jacks that allows the Trex unit to power a
FOUNDATION fieldbus device. Attach the lead set to the FF terminals, and then
Glossary
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