48
Topology of the bus system
6.2
Operating modes
6.2.1
Ring topology
For the first time, Homematic IP Wired offers easy instal-
lation of fault-tolerant networks for a house or building
bus system. Even in case of interruptions of the lines,
there will be no device or function failures. The Home-
matic IP Wired bus does therefore support the setup of
a ring topology (“loop”). The bus is always connected
from the Homematic IP Wired Access Point to the next
device and finally back to the Homematic IP Wired Ac-
cess Point, so that a loop is established. The Wired Access
Point checks, if the data on the bus is carried to both bus
connections. If the line is interrupted at one part of the
ring, the bus topology is restructured automatically into
two independent bus lines, so that the devices keep on
working correctly.
6.2.2 Two separate buses
The both bus connections of the Wired Access Point can
be operated also as two separate bus lines. Thus, e.g. one
bus can be used with the devices within the distribution
board. The second bus can then be used for devices of
the field installation (e.g. flush-mounted devices) or for
devices in additional sub-distribution boards.
The Wired Access Point automatically transfers the data
in this operating mode from one bus to another.
Summary of Contents for HmIPW-DRAP
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