2 Equipment Description
2.26 UCN Cable System
140
HPM High-Performance Process Manager Service
R688
Honeywell
December 2020
3 27 58
LCN "A" Coa xi al Ca bl e
Network
Interface
Modu le
Uni ve rsal
Statio n
Network
Interface
Modu le
Hi story
Modul e
75 ž Terminator
Red und ant Pa ir
UCN Drop Cab le s
(50 meters (1 64 fe et) maxi mum le ngth)
75 ž Terminator
UCN Trunk
Cab le s *
"A"
"B"
HPM
HPMM HPMM
LCN System
HPM
HPMM
HPM
HPMM
HPM
HPMM
75 ž Terminators in All Unused Taps
Each trun k cab le (se gment) l eng th i s
restricte d to mul tipl es o f a basi c le ngth
(2.6 me te rs (8.53 feet) for the sta ndard
RG-11 type UCN Trun k).
Opti onal
Armored
Trunk
75 ž Terminator
75 ž Terminator
Note that red unda nt de vi ces on
the sa me UCN sho uld u se the
same ta ps.
*
Dot desig nates the
i sol ated tru nk po rt
Instal l p er the proce dure
found i n the LCN Pl ann ing
manu al .
LCN "B" Coa xi al Ca bl e
Ground S tud
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.
Summary of Contents for HPM
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