Schneider Automation Modicon Quantum Ethernet Manuale Utente Pagina 57

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Product Description
33002479 06 07/2008 57
Cable Schemes
Overview The following information provides guidelines on proper cabling schemes for your
Ethernet configuration.
Twisted Pair
Length
In a standard Ethernet cabling scheme network nodes such as the Quantum
Ethernet module connect via a cable to a port on a central hub or switch. The
maximum cable length between nodes depends on whether they are connected
through hubs or switches, as the following table describes:
Cabling with
Conventional
Hubs
The figures and tables that follow show the maximum number of hubs and the
maximum cable length between nodes allowed if using hubs.
10BASE-T
Distances with
Hubs
The 10 BASE-T cabling allows for 3 hubs with a link maximum distance of 100 m
(325 ft) and a total network diameter of 500 m (1625 ft).
Device
Type
Max. Cable Length
from Node to Hub/
Switch
Max. Number of Hubs/
Switches Between Any
Two Nodes
Max. Distance Between
Network Nodes
Hub 10 BASE-T: 100 m 3 500 m
Switch 10/100 BASE-T: 100 m
100 BASE-FX: 2 km
Unlimited Unlimited
500 m (1625 ft) maximum cable length between nodes
Hub Hub
Hub
Backplane
Backplane Backplane
Backplane Backplane
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