LON
®
Installation
Note: If you have no previous experience with LON
®
installation, study this section carefully!
All SYSTEM X components (nodes) are connected together in a common
L
ON
W
ORKS
®
communication network.
The network is polarity insensitive and therefore either of the two twisted pair wires can be
connected to either of the LON
®
connectors on the SYSTEM X components.
Due to the risk of cross-talk/interference, it is recommended not to run LON
®
Network
cables close to high voltage cable, or cables carrying video signals.
Note: In countries where the CE approval is mandatory, LON
®
cables with an overall screen must
be used in order to comply with EMC/EMI standard EN 50130-4. The cable screen should be
connected to the cable clamp next to the LON
®
connector.
Selection of network Topology
In a
free topology network
, there are no demands as to how the cables are routed
between the nodes. It can be point-to-point, bus, star, tree, or a mixture.
Free Topology
Termination
When using free topology, the maximum cable length in one segment is approx. 500
meters, and is calculated adding together all cables used. The maximum number of nodes in
one segment is 64. If more that 500 meters, or more than 64 nodes, is required, two or
more network segments can be made, using a repeater between each segment.
Bus Topology
In a bus topology network, all nodes are connected on a bus. Cable stubs can be used to
connect the individual nodes to the bus, as long as the length of the stub is maximum 3
meters.
The advantage of bus topology, is that the cable length can be longer than when using free
topology. This can be useful e.g. when making network connection to remote PTZ cameras.
Bus Topology
Termination
Termination
The maximum number of nodes on one bus is 64. Maximum length of the network bus
depends on the type of cable used. If more nodes, and/or longer cable length, is required,
two or more network segments can be made, using a repeater between each segment.
S Y S E M
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