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2 Equipment Description
2.27 EUCN Cable System
Isolated port identification
Each tap has an indicator dot located near the isolated port connector.
CAUTION
Card file backpanel connections
The following figure illustrates the A and B UCN drop cable connections to the HPM UCN Interface
module in a 7-Slot HPMM card file.
Figure 68 UCN Drop Cable Connections to a 7-Slot HPMM Card File
2.27 EUCN Cable System
Introduction
The Enhanced Universal Control Network (EUCN) provides communication between the Enhanced
High-Performance Process Manager Modules (EHPMs) and the Enhanced Network Interface Module
(ENIM) on the LCN as illustrated in the following figure.
ATTENTION
With TPN R686, the Enhanced Network Bridge (ENB) is introduced. The ENB is a variant of the
NIM that allows communication between the LCN and both UCN and EUCN networks. It can
communicate over coaxial-based UCN and FTE-based EUCN communication networks and
provides a gateway function between the UCN and the EUCN. The ENB also facilitates on-
process migration from HPM to EHPM (assuming you have redundant HPMs). For more
information, see section "Cable troubleshooting guidelines for EUCN" on page 147.
142
Cables between taps must be connected so that each cable segment connects the
isolated port of one tap to the nonisolated port on the next tap
HPM High-Performance Process Manager Service
Honeywell
R688
December 2020
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Troubleshooting
