6. Operational check
Carry out an operational check when the water meter is com-
pletely mounted. Activate the push-button on MULTICAL
®
41
and check that reliable display values for water flow etc. appears.
7. Electrical connection
Terminal no.
Connection
+
60
Supply (red)
-
61
Supply (black)
8.3 Radio/pulse inputs
The radio module is used for wireless reading of MULTICAL
®
41.
When connecting the supply voltage the radio module retrieves
the type and meter number of the meter and transfers data to
the memory of the module.
The radio module is ready to communicate in less than 10
seconds.
The radio module is read via the hand-held terminal, but is
prepared to form part of a radio network.
For further information, see Technical Description 5512-013.
The radio module also offers the option of leak surveillance.
Every hour the meter’s volume is checked and compared to an
alarm limit.
A pulse output is mounted on the module.
Power:
30 V
Load:
10 mA
Pulse duration: 0.1 seconds
Meter factor:
10 litres/pulse
5. Power supply
MULTICAL
®
41 can be power supplied by a built-in lithium battery,
a 24 VAC internal mains module or an internal 230 VAC mains
module.
The two wires from the battery or mains module are to be
mounted in terminals 60 and 61 of the calculator.
The polarity must be correct; connect the red wire to terminal
no. 60 (+) and the black wire to terminal no. 61 (-).
5.1 Battery supply
Connect MULTICAL
®
41 to a lithium battery, D-cell. The battery
is marked with installation year, e.g. 2007, and production date.
Obtain optimal battery life by keeping the battery temperature
below 30
°
C.
The voltage of a lithium battery is almost constant throughout
the entire lifetime of the battery (approx. 3.65 V). Therefore,
it is not possible to determine the remaining capacity by mea-
suring the voltage.
The battery cannot be and must neither be charged nor short-
circuited. Used batteries must be handed in for approved de-
struction e.g. at Kamstrup A/S.
5.2 Mains modules
The modules are in protection class II and are connected via a two-
wire cable (without earth) through the cable bush of the calculator
placed at the top left corner of the connection unit.
Use connection cable with an outside diameter of 5–10 mm
and secure correct dismantling as well as correct mounting of
the cable relief.
Max. permitted fuse: 6 A
National installation regulations must be obeyed. For installa-
tion in Denmark:
See Elråd Message concerning installations
to net supplied heat meters.
Black
Red
24 VAC
Use a transformer,
e.g. type 66-99-403
for a 24 VAC supply
module.
NB! This module
cannot be supplied
from 24 VDC.
Black
Red
230 VAC
This module is used for
direct mains connec-
tion.
8. Plug-in modules
MULTICAL
®
41 can be retrofitted with a number of extra func-
tions by means of plug-in modules. Below is a brief description
of the individual modules.
8.1 Data/pulse inputs
The data terminals are e.g.
used to connect a PC or a
MULTITERM hand-held terminal
via an external reading plug,
which is connected as shown
below.
The signal is passive and and galvanically separated through
opto-couplers. Conversion to RS232 level requires connection
of data cable 66-99-106 with above connections.
The pulse inputs can be used when connecting 2 water meters.
Please note the max. pulse frequency and correct pulse coding
(l/pulse), which are selected by means of the FF and GG con-
figuration.
65 - 66
67 - 68
Input A
Input B
f
<
0.5 Hz
f
<
0.5 Hz
62
63
64
Brown
White
Green
8.2 M-Bus/pulse inputs
The M-Bus module can be mounted in star, ring or bus topology.
The M-Bus module is available in two versions:
- supporting primary addressing
- supporting primary and secondary addressing
The M-Bus
network is
connected to
the terminals
24 and 25.
The polarity is
unimportant.
The M-Bus
module is
available with
pulse inputs.
