KROHNE OPTIMASS with MFC 300 EN - Manual (Page 84)

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Passive Mode: requires external power source: Uext
a
32V DC Uo 1.5V @ 10 mA:
I
a
20 mA at f
a
10 kHz (overflow up to fmax
a
12 kHz)
I
a
100 mA at f
a
100 Hz
Active Mode: uses internal power source: Unom 24 V DC Uo 1.5V @ 10 mA
I
a
20 mA at f
a
10 kHz (overflow up to fmax
a
12 kHz)
I
a
100 mA at f
a
100 Hz
NAMUR Mode: passive to EN 60947-5-6, f
a
10 kHz, fmax
a
12 kHz
Scaling: Frequency output: in pulses per unit time (e.g. 1000 pulses/s at Q100%
Pulse output: in pulses per unit volume (e.g. 100 pulses/m³).
Pulse output: in pulses per unit volume (e.g. 100 pulses/m³).
Pulse width symmetrical, pulse duty factor 1:1, independent of output frequency,
automatic, with fixed pulse width, duty factor approx. 1:1 at Q100%, or
pulse width of 0.01-2 s adjustable as required for correspondingly low output
frequency
9.8.2 Pulse and Frequency Output
Depending on the version, 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 terminal compartment.
The pulse or frequency output can be set under Fct. C 3.1 Hardware.
All pulse / frequency outputs are galvanically separated from all other circuits and from each
other.
Depending on the version, several pulse / frequency outputs can be installed in parallel.
Factory-set data and functions will be found in the enclosed report on factory settings.
All operating data and functions are adjustable, see Sect. 10.4.
If pulse outputt up to 10 kHz is used on the MFC 300W, cables MUST be screened and the
screens terminated on the spec
cial receptacles provided.
Forward / reverse flow measurement (F/R mode) is possible, see Fct. C 3.x.6 or 7 Polarity (fre-
quency/pulse output) and Fct. C 3.x.1 Mode (status output).
Connection diagrams see section 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