Ams trex™ Device Communicator

Option
Description
Address
Poll for devices at the specified addresses.
•
Address 0
: Poll non multi-dropped loops. This is the default option.
•
Address Range 0 to 15
: Poll HART Universal Revision 5 or earlier
devices on multi-dropped loops.
•
Address Range 0 to 63
: Poll HART Universal Revision 6 or newer
devices on multi-dropped loops.
•
Address 63 (wireless adapter)
: Poll the default address for
Wireless
HART adapters.
•
Address 0 and 63 (wireless adapter)
: Poll address 0 and the
default address for 
Wireless
HART adapters.
•
Custom 
: Poll a unique or non-consecutive group of addresses
(example: “0, 5-7, 12”). Use a hyphen to specify consecutive
addresses and/or a comma to separate numbers or groups of
numbers.
Tag
Poll by the tag of the device.
Long Tag
Poll by the long tag of the device. (Only supported in HART Universal
Revision 6 or higher devices.)
3.18
Connections to FOUNDATION fieldbus devices
Connect the Trex unit to the device by using the lead set and the appropriate terminals. An
error message appears if the lead set is connected incorrectly. Digital communication is
susceptible to electrical noise; follow proper wiring instructions.
Note
Dynamic variables shown while online represent the digital data being sent from the
device.
3.18.1
Precautions for using the Trex unit with FOUNDATION
fieldbus devices
 WARNING
If a fieldbus segment is connected to a host system, the changes made with the Trex unit
may not be recorded in the host system’s permanent database. Verify the changes in the
database. Otherwise, this could cause unpredictable results and, depending upon your
application, process disruption leading to property damage, serious injury, or death.
Ensure all safety precautions and work procedures have been followed.
User Guide 
Field Communicator application
September 2021
User Guide 
99

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 WARNING
Changing device parameters could adversely affect the control of your process. Put the
control loop in Manual/Out of Service before applying changes. Verify the output before
returning the control loop to Auto. Failure to do so could result in property damage,
serious injury, or death. Ensure all safety precautions and work procedures have been
followed.
 CAUTION
The Trex unit draws approximately 12 mA from the fieldbus segment when it is online.
(The Trex unit draws 0 mA when it is offline.) Ensure the power supply or barrier on the
fieldbus segment has the capacity to provide this additional current when the Trex unit is
online. If a heavily loaded fieldbus segment is drawing near the capacity of the segment’s
power supply, connecting the Trex unit may result in loss of communication.
3.18.2
FOUNDATION fieldbus communication terminals
The Trex unit has terminals that enable communication with FOUNDATION fieldbus
devices. Insert the lead set into the FF terminals and connect to a FOUNDATION fieldbus
device or to a connection point on the fieldbus segment.
On the Device Communicator Plus communication module, the red 
FF pwr
terminal
enables the Trex unit to power one FOUNDATION fieldbus device. To use this terminal, you
need the FOUNDATION fieldbus Power Plug that connects to the FF pwr terminal and the
positive (red) FF terminal. This lets the Trex unit communicate with and power one
FOUNDATION fieldbus device.