26 I ICT TODAY
Centralized Node Centric
Pros Cons
• Can employ structured
cabling
• Relatively easy
administration
• Minimal connections
• Only requires centralized
power in TR
• Optimizes use of PoE power
• Reduces cabling from nodes
to fixtures
• Supports all IB applications
speeds
• Limited flexibility to
support MAC activity
• High volume of cable
• Additional connection point
TABLE 2: Pros and cons of the centralized
node centric architecture.
FIGURE 9: Centralized node centric architecture.
Centralized Zone - Fixture Centric
Pros Cons
• Employs structured cabling
• Easily administered
• Only requires centralized
power in TR
• Provides support of future
IB applications
• Supports all IB application
speeds
• Optimal support of MAC
activity
• High Day One cabling
CAPEX
• Additional connection point
TABLE 3: Pros and cons of the centralized
zone-fixture centric architecture.
FIGURE 10: Centralized zone-fixture centric architecture.
occurs in the area of the final seated contact position,
the result can cause increased resistance resulting
in everything from power delivery inefficiencies to
compromised connector reliability. Some connecting
hardware manufacturers have succeeded in ensuring
that arc location that occurs during the unmating cycle
is separate from the fully mated position (see Figure 8).
Connecting hardware having the required performance
for mating and unmating under the relevant levels of
electrical power and load (i.e., compliant to the test
schedule described in IEC 60512-99-002 for engaging
and separating connectors under electrical load) should
be chosen.
ENIE, MEENIE, MINEY, MO
The cabling topology can take several forms and can vary
depending on application speeds, intelligent building
applications and cost among other variables. For example,
when connecting low-voltage LED lighting, the cabling
can be fixture centric or node centric. In a decentralized