Manual VIPA System 300V Chapter 6 Deployment CPU 31x with TCP/IP
HB130E - CPU - Rev. 11/50 6-9
A twisted pair network can only be constructed with a star topology.
Hub/
Switch
Hub/
Switch
CPU 31xNET Twisted pair cable
X4
No.1 No.3
No.2 No.4
X4-NET
1
2
At twisted pair cable has four conductors
twisted together in pairs. The different
conductors have a diameter of 0.4 to
0.6mm.
There are a few restrictions and rules that must be taken into account
using twisted pair:
• Maximum number of hub elements per segment 2
• Maximum length of one segment 100m
• What is the size of the area that must be served by the network?
• How many network segments provide the best solution for the physical
(space, interference related) conditions encountered on site?
• How many network stations (SPS, IPC, PC, transceiver, bridges if
required) must be connected to the cable?
• What is the distance between the different stations on the network?
• What is the expected “growth rate” and the expected number of
connections that must be catered for by the system?
• What data amount has to be handled (band width, accesses/sec.)?
Draw a diagram of the network. Identify every hardware item (i.e. station
cable, hub, switch). Observe the applicable rules and restrictions.
Measure the distance between all components to ensure that the maximum
length is not exceeded.
Overview over the
components
Restrictions
Analyzing the
requirements
Drawing a
network diagram
[1] 4port Switch
[2] Switch assignment
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