32758
LCN "A" Coaxial Cable
Network
Interface
Module
Universal
Station
Network
Interface
Module
History
Module
75 ž Te rminator
Redundant Pair
UCN Drop Cables
(50 meters (164 feet) maximum length)
75 ž Te rminator
UCN Trunk
Cables *
"A"
"B"
HPM
HPMM HPMM
LCN System
HPM
HPMM
HPM
HPMM
HPM
HPMM
75 ž Te rminators in All Unused Taps
Each trunk cable (segment) length is
restricted to multiples of a basic length
(2.6 meters (8.53 feet) for the standard
RG-11 type UCN Trunk).
Optional
Armored
Trunk
75 ž Te rminator
75 ž Te rminator
Note that redundant devices on
the same UCN should use the
same taps.
*
Dot designates the
isolated trunk port
Install per the procedure
found in the LCN Planning
manual.
LCN "B" Coaxial Cable
Ground Stud
Redundant UCN cables
Communication is accomplished on a redundant cable system consisting of Cable A and Cable B. Trunk
cables are interconnected by taps that allow connection of drop cables from both the Cable A and Cable
B. Redundant HPMMs should have their A cables connected to the same A tap, and their B cables
connected to the same B tap.
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