ABB Symphony Harmony Series - Harmony Area Controller with Harmony I;O Blocks; System Overview

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System Overview
architecture options, and provides Hnet component installa-
tion and connection procedures.
Harmony I/O data sheets supplement the information pro-
vided in these instructions.
System Overview
Figures 1-1 and 1-2 are hierarchical views of the Symphony
system showing the various system communication levels and
the position of the Harmony I/O system within these levels.
Figure 1-1 shows a Harmony area controller with I/O blocks.
Figure 1-2 shows a rack-mounted Harmony bridge controller
with I/O blocks.
The main components of the Harmony I/O system are I/O
blocks and Hnet (Fig. 1-3). Together they operate as a sub-
system dedicated to the Harmony controller. Hnet is the
redundant network over which Harmony controllers and Har-
mony I/O blocks communicate. The controller performs the
actual control functions. The I/O blocks process any inputs
Figure 1-1. Harmony Area Controller with Harmony I/O Blocks
HARMONY
AREA
CONTROLLER
I/O
BLOCK
ANALOG CONTROL
STATIONS
T01976C
REPEATER
MOUNTING
UNIT (RMU)
CNET
I/O H N ET
I/O HNET
HNET
RMU I/O BLOCKS
REMOTE
LOCATION