Festo CPX-FB33 Manual page 37

1. Installation
Festo P.BE-CPX-PNIO-EN en 1407c English
Use of switches and routers
The switch integrated in the bus node permits division of the
network into several segments.
With use of additional switches and routers, the network can
be divided into additional segments. Thus, it is possible to
structure the PROFINET network and realize greater network
expansions.
Independent of the network structure, the expansion of a
PROFINET segment must not exceed certain connection
lengths:
– Copper connecting cable:
(Ethernet twisted pair cable, 22 AWG):
max. 100 m between network participants
(PROFINET-End-to-end-Link)
– Optical connecting cable
(POF fibre-optic cable, max. 12.5 dB signal attenuation
over the entire connection length):
max. 50 m PROFINET-End-to-end-Link.
Switches and routers for Industrial EtherCat are available on
the market from various companies. There are many IP20,
IP65 or IP67 components.
– Unmanaged Switches:
for small network solutions with a low network load or
minimal requirements for deterministics
– Managed switches:
for comprehensive network solutions, with diagnostics
and control functions.
Note
Make sure that any intermediate switches and routers sup-
port the PROFINET function "Fast Start-up" (FSU) when
you use this additional function. Further information on
FSU can be found in section B.1.3.
1-19