Zenner multidata WR3 - Communication; M-Bus (Optional)

22
At cooling-meters for calibration
rights have all subcomponents to
be calibrated and marked. For use
as a combined heat / cooling meter
all subunits have to be marked
twice, that means conformity
assessment and calibrated EU (only
valid for Germany).
The calculator has 7 cable glands
for wires with a diameter between
4.2 and 10 mm. Keep unused
glands closed.
Mind the connection order: tem-
perature sensors rst, ow sensor
aerwards!
Communication
■
At calculators with two pulse
outputs typically the rst out-
put (I/O1) gives the energy and
the second (I/O2) the volume
information. The pulse value is
permanently set and corre-
sponds with the last position of
the associated display value.
■
At calculators with combined
heating / cooling calculators the
rst output (I/O1) gives the heat
energy and the second (I/O2) the
cooling energy. The pulse value
is permanently set and corre-
sponds with the last position of
the associated display value.
Example:
Output 1 = energy output
Energy display = XXXXX.XXX MWh
Last position = 0.001 MWh = 1 kWh
Output pulse = 1 kWh
Note:
The calculator can be ordered
with two inputs optionally. The
pulse value can be called up in the
display (see the display overview,
Level 1).
M-Bus (optional)
The optional M-Bus interface
complies with the norm EN 13757
and operates with 2400 baud xed.
It can be set to 300/9600 baud if
necessary.
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