KROHNE OPTIMASS with MFC 300 EN - Manual (Page 86)

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Passive Mode: requires external power source:Uext
a
32V DC:
Uon 19 V DC
Uoff 2.5 V DC
Active Mode: uses the internal power supply:
Unom 24 V DC
Inom 16 mA
NAMUR Mode: to EN 60947-5-6
(Control input active in accordance with NAMUR EN 60947-5-6:
open-circuit and short-circuit monitoring to EN 60947-5-6 (NAMUR) can only
be done from the infeeding device. Due to the principle involved, only monitor-
ing of control input CN takes place in the signal converter.)
Control Input (adjustable to the following operating states, see Fct. C 2.x.1):
off
stop all counters
stop counter 1 or 2
reset all counters
reset counter 1 or 2
error reset
Zero calibration zero output + stop Cnt. (not display)
all outputs zero (not display, not counters)
output A, B, C or D zero
hold all outputs (not display, not counters)
hold output A, B, C or D
range change
Connection diagrams: see section 9.9
9.8.4 Control Input
Depending on the version, the outputs and inputs to be connected passively, actively and/or to
NAMUR EN 60947-5-6. Refer to the tables in section
9.7 to see which I/O version and which
inputs and outputs are installed in your signal converter.
See also the sticker inside the cover of the terminal compartment.
All control inputs are galvanically separated from all other circuits and from each other.
Depending on the version, two control inputs can be installed in parallel.
If two are installed, these have to be set to different functions.
In the passive mode, the control inputs can be operated with any polarity.
Factory-set data and functions are given in the enclosed report on settings.
All operating data and functions are adjustable, see section. 10.4.
Status output (adjustable to following operating states, see Fct. C 3.x.1):
Warning:
For installations in hazardous areas, reference MUST also be made to the publication
“Guidelines for the use of Coriolis Meters in Hazardous Areas”
9.9 Connection Diagrams of Outputs and Inputs
Please note: Depending on the version, connect the outputs and inputs passively, actively
and/or to NAMUR EN 60947-5-6
The tables in section 9.7 show which I/O version and which outputs and inputs are installed in
your signal converter. Please note the operating data!
The following connection diagrams and operating data do not apply to hazardous-duty equip-
ment (EEx); refer to separate operating instructions for such equipment.
Active mode: The MFC 300 supplies the power for operating (driving) the receiver instruments;
note max. operating data.
Passive mode: An external power source (Uext) is required to operate (drive) the receiver
instruments.
All groups are galvanically separated from each other and from all other input and output cir-
cuits.
Terminals that are not used should not have any conductive connection to other electrically
conductive parts.