NK8000 network planning
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Building Technologies 049_DMS_DMS8000_Application_Specification_Planning_MP4.81_A6V10063710_a_en.doc
CPS Fire Safety 09.2016
5.2 IT rules
The NK8000 network supports the IEEE 802.3 Ethernet 10BaseT standard and
100BaseTX, which are based on a star topology.
The cable specification for this standard is minimum Cat.5 UTP. We recommend you
use Cat.6 cable, however, which fulfils the specification for 100BaseTX networks.
Note: The maximum length for an Ethernet segment for Ethernet 10BaseT and
100BaseTX is 100m.
5.2.1 Repeater rules
It is possible to extend the Ethernet length using repeaters (hubs). However, you can-
not use infinite repeaters to extend the cable.
Note: The transfer speed determines the number of repeaters you can install.
10Mbps network
For a 10Mbps network, the 5-4-3 repeater rule is valid. This rule means that you can
attach a maximum of 5 segments, with 4 repeaters in serial, but you can only attach 3
segments to other devices.
The better way to extend line length is using a bridge/switch, or a router or fibre ca-
bles. Consider the extra costs using this method.
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