Phoenix Contact 2313643, User Manual, Page: 30 / 94

PSI-MODEM-SHDSL/ETH, TC ETH EXTENDER
30
PHOENIX CONTACT 104273_en_01
3.5 Application examples
3.5.1 Redundant data communication in rotating applications
Figure 3-15 Redundant slip ring communication
The Ethernet extenders are connected in this application via a 4-wire path. The connection
is therefore redundantly established. With the two digital outputs of the Ethernet extender,
it is possible to monitor the communication via the slip ring.
Special application: Redundant data communication in wind power plants
Figure 3-16 Redundant slip ring communication with fiber optics
The example shows the structure for a wind power plant in which the data communication
between hub and nacelle is secured by a redundant network. Independent transmission
paths are used for data communication.
With use of fiber optic technology, standard Ethernet data transmission is based on two
WDM media converters (e.g. via FL MC EF WDM-SET SC, 2902660). For fiber optic trans-
mission, an optical rotary transformer with a single fiber is used, which is integrated in the
axis of the existing copper slip ring.
The redundant path is constructed with the aid of Ethernet extenders. The existing copper
slip ring is used for the SHDSL connection and redundancy management is ensured via
managed switches (e.g. via the switches FL SWITCH LM 8TX, 2832632 or FL SWITCH
SMCS 8TX, 2989226; Phoenix Contact has additional RSTP capable switches on offer).