ABB Symphony Harmony Series, Instruction, Page: 93 / 402

1 - 2 WBPEEUI240751C0
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
H A R M O N Y
A R E A
C O N T R O L L E R
I/O
B LO C K
A N A LO G C O N T R O L
S TAT IO N S
T 0 19 7 6C
R E P E ATE R
M O U N T IN G
U N IT (R M U )
C N E T
I/O H N E T
I/O H N E T
H N E T
R M U I/O B LO C K S
R E M OT E
LO C AT IO N