Communication; M-Bus (Optional) - Zenner MULTIDATA WR3 Manual De Instalacion Y Uso

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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 twi-
ce, that means conformity assess-
ment and calibrated EU.
The calculator has 7 screwed
cable glands for wires with a dia-
meter between 4,2 and 10 mm.
Keep unused glands closed.
Mind the connection order: tem-
perature sensors first, flow sen-
sor afterwards!

Communication

■
At calculators with two pulse
outputs typically the first output
(I/O1) gives the energy and the
second (I/O2) the volume informa-
tion.
■
At calculators with combined
heat / Cold calculators the first out-
put (I/O1) gives the heat energy
and the second (I/O2) the cooling
energy. The pulse value is perma-
nently set and corresponds to the
last position of the associated dis-
play value.
22
Français
Example:
Output 1 = energy output
Energy display = XXXXX.XX MWh
Last position = 0,01 MWh = 10 kWh
Output pulse = 10 KWh
Note: The display resolution shall
be selected such that the display
can not run over within a period of
one year.
The calculator can be ordered with
two inputs optionally. The pulse
value can be called up in the dis-
play (see the display overview,
Level 1).

M-Bus (optional)

The optional M-Bus interface com-
plies with the norm EN 1434-3 and
operates with 2400 baud fixed. It
can be set to 300/9600 baud if ne-
cessary