M-Bus Slave For Multical - Kamstrup M-Bus Technical Description

4. M-Bus Slave for MULTICAL

The M-Bus Slave is a module especially developed
for MULTICAL ® and is easily installed in the modu-
lar space.
The M-Bus Slave is supplied via the M-Bus Master,
and there is a galvanic decoupling to MULTICAL
which cannot be supplied over the M-Bus Master.
The M-Bus Slave is equipped with either two
extra in- or outputs, to facilitate remote data
acquisition from other meters, e.g. water meter
or to read out the energy and volumes pulses
from the meter itself.
The M-Bus Slave is an intelligent unit with its own
processor and RAM.
The M-Bus Slave automatically collects data from
the heat meter every 12 hours. furthermore data is
collected during reset/start as well as when data
has been sent from M-Bus Slave to M-Bus Master.
Reset is produced by decoupling the supply power
to the M-Bus system for a while (at least 1 minute).
Pulse inputs
Terminal 24-25 (M-Bus)
Terminal 65-66 (input A)
Terminal 67-68 (Input B)
Order numbers:
M-Bus Slave for MULTICAL ® III/MULTICAL
®
M-Bus Slave for MULTICAL III/MULTICAL
M-Bus Slave for MULTICAL ® with pulse inputs
®
M-Bus Slave for MULTICAL with pulse outputs
There is a difference between the M-Bus Slaves for MULTICAL
MULTICAL ® transmits a larger amount of data. Please refer to paragraph 10: Data acquisition of M-Bus.
The M-Bus Slave can also be initiated from the
M-Bus Master by sending the format SND_NKE.
Initiation means resetting the internal counters
and collecting data from the meter. When the M-Bus
Slave collects current data from the meter, commu-
®
,
nication to the M-Bus network is blocked. This inter-
val is called the initiation time, for MULTICAL
is typically 9 seconds, whereas the typical initiation
time of a MULTICAL
For the creation of M-Bus data packs the M-Bus
Slave uses the codings of MULTICAL
If the coding cannot be found in the M-Bus Slave
an error message appears which means that the
decimal point will not be correctly placed in the
M-Bus data pack.
Each M-Bus Slave has a maximum current
consumption of 1 Unit Load (1.5 mA).
= 410 Ω, C
R
in
M-Bus connection Terminal 24-25
Pulse input A Terminal 16-17
Pulse input B Terminal 67-68
® with pulse inputs
®
with pulse outputs
®
® is 12 seconds.
®
= 0,5 nF.
in
Pulse outputs
(M-Bus) M-Bus connection
(CE) Energy pulse
(CV) Volume pulse
66-04-000-100
66-07-000-100
66-08-000-100
66-09-000-100
® III and MULTICAL ® .
®
III it
(A-B-CCC).
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