It Rules; Repeater Rules - Siemens DMS8000 Application & Planning

NK8000 network planning
5.2

IT rules

5.2.1

Repeater rules

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Building Technologies
CPS Fire Safety
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.
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.
049_DMS_DMS8000_Application_Specification_Planning_MP4.81_A6V10063710_a_en.doc
09.2016