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Minimum load impedance
A minimum load impedance of 250
Ω
is required to enable the HART signals to be modulated on
the current output. Series-connect an appropriate resistor if the devices located in the current
output circuit should not attain this value. It will then be possible via the minimum load impedance
e.g. to connect the HART communicator or smart converter in parallel without interrupting the
current output. Please note that the load impedance should not exceed a maximum of 500
Ω
.
HART operating tools / DD
The IFC 090 can be operated either via its local operator interface or by means of the HART
communicator or the CONFIG program. Both operating tools are available from KROHNE.
Operator control by means of the HART communicator requires a device description (DD) which
we can load for you into the communicator. We can, of course, also load the DDs of all
manufacturers who have filed their DDs with the HART Communication Foundation. If you wish to
use the IFC 090 in your operating tool, for example, please ask for the description of the HART
command used so that you can address the complete IFC 090 functionality via HART.
In the near future we shall also be supporting the ASM tool from Rosemount and the SIPROM tool
from Siemens.
Power supply units / isolation switching amplifiers
You will need an appropriate power supply unit if the current output is to operate in the passive
mode. Please ensure that this power supply unit is also suitable for HART communication.
This applies equally to isolation switching amplifiers that are sometimes used in the active mode.
Additional functions for HART version
Fct.
Text
Description and settings
3.08
LOCATION
Set any tag name (max. 10 characters)
Characters assignable to each place:
•
A - Z, a - z, 0 - 9, or “ - ” (= blank character)
Press
↵
key to transfer to Fct. 3.08 “LOCATION”.
3.09
COM
HART communications-interface
•
OFF
(switched off)
}
Select with
↑
key.
•
HART (switched on)
Press
↵
key,
set “ADDRESS”
with
↑
and
→
keys,
Range: 001 - 015
Press
↵
key to transfer to Fct. 3.09 “COM”.
