Kamstrup M-Bus, Technical Description

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17
5511-710
GB/06.2002/Rev.
B1
7. M-Bus Cascade module
The Cascade module can be used to increase the
number of M-Bus Slaves in an M-Bus network from
40 to max. 250 M-Bus Slaves. Furthermore, the ca-
ble length can be multiplied by six by using six
Cascade modules mounted in M-Bus Master units.
The Cascade module is mounted in an M-Bus Mas-
ter and needs neither set-up nor address.
The function of the Cascade module is to repeat
communication to and from the M-Bus Master.
M-Bus is a local network which makes it possible
to communicate with and read energy meters from
a centrally placed M-Bus Master. A network can in-
clude from one to 250 M-Bus Slaves as required.
A new M-Bus Master with Cascade module is to be
connected to an already existing network parallel
to one of the connected MULTICAL
®
energy meters
with M-Bus Slave. From the new M-Bus Master a
new network with 38 energy meters and 1 Cascade
module or 40 M-Bus Slaves can be established.
It is possible to connect up to 6 M-Bus Masters
and thereby increase the number of energy meters
in the network to a total of 250 meters (primarily
addressing).
Each Cascade module has a power consumption of
2 Unit Loads (3 mA).
Rin = 410
W
, Cin = 1 nF.
Extra cable length per unit:
- Max. 1.800 m to the most remote M-Bus
Slave/0.8 mm
2
.
M-Bus interface
(53, 54).
To this the M-Bus
Slaves are con-
nected.
Input A (65, 66),
Input B (67, 68).
- Are not in use.