KROHNE OPTIMASS with MFC 300 EN - Manual (Page 83)

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9.8 Operating Data I/O
9.8.1 Current Output
Depending on the version, the outputs and inputs to be connected passively or actively and / or
to NAMUR EN 60947-5-6! The tables in section 9.7 show which I/O version and which inputs
and outputs are installed in your signal converter.See the sticker inside the cover of the termi-
nal compartment.
All current outputs are galvanically separated from each other and from all other circuits.
Depending on the version, up to 3 current outputs in parallel can be built in, one always with
HART® communication (except for Foundation Fieldbus and PROFIBUS).
Passive mode: external power supply Uext
a
32 V DC @ I
a
22 mA
Active mode: load impedance RL
a
1 k
Ω at 1 a
22 mA (not applicable to EEx-i, see separate
Ex – operating instructions)
Self-monitoring interruption of mA loop or
load impedance too high in mA loop
Factory-set data and functions are given in the enclosed report on settings.
All operating data and functions are settable, see section 10.4.
Error message via status output (see Fct. C 3.x.1).
Current value for error identification adjustable, see Fct. C 3.x.3 (current output).
Range change, automatically by status output or manually by control input, see Sect. 10.4, Fct.
C 3.x.11 and C 3.x.12 (for current output) and Fct. C 3.x.01 (for status output or control input).
Setting range threshold: 5...80% of Q100%, ± 0...5% hysteresis (appropriate ratio from low to
high range of 1:20 to 1:1.25).
The active range is signalled via a status output.
Forward / reverse flow measurement (F/R mode) is possible, see Fct. C 3.x.7 (current output)
and Fct. C 3.x.1 (status output).
Connection diagrams, see s.9.9
Warning:
For installations in hazardous areas, reference MUST also be made to the guidelines for the
use of coriolis meters in hazardous areas!