Redundant Ucn Cables - Honeywell HPM Service

2 Equipment Description
2.26 UCN Cable System
LCN "A" Coa xi al Ca bl e
LCN "B" Coa xi al Ca bl e
Uni ve rsal
Statio n
75 ž Te rmi nator
75 ž Te rmi nator
"A"
Opti onal
Armored
Trunk
75 ž Te rmi nator
75 ž Te rmi nators i n All Unused Tap s

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.
140
Network Network
Interface Interface
Modu le Modu le
UCN Trunk
HPM
Cab le s *
"B"
HPMM HPMM
HPM
HPMM
Note that red unda nt de vi ces on
the sa me UCN sho uld u se the
same ta ps.
HPM
75 ž Te rmi nator
HPMM
HPM High-Performance Process Manager Service
Honeywell
LCN System
Instal l p er the proce dure
found i n the LCN Pl ann ing
Hi story
manu al .
Modul e
Red und ant Pa ir
UCN Drop Cab le s
(50 meters (1 64 fe et) maxi mum le ngth)
*
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).
Ground S tud
Dot desig nates the
i sol ated tru nk po rt
HPM
HPMM
3 27 58
R688
December 2020