ABB Symphony Harmony Series, Instruction, Page: 94 / 402

System Overview
WBPEEUI240751C0 1 - 3
from and outputs to field devices for the controller. The con-
troller can communicate with up to 64 Hnet devices.
The I/O types include:
•
Analog input (AIN).
•
Analog output (AOT).
•
Control loop input/output (CIO).
•
Digital input/output (DIO).
•
Digital output (DOT).
The repeater mounting unit (RMU) is also an important com-
ponent of the Harmony I/O system. The repeater mounting
unit provides mounting slots for Hnet repeaters used to com-
municate with remote enclosures over fiber optic cables.
Figure 1-2. Harmony Bridge Controller with Harmony I/O Blocks
H A R M O N Y R AC K
C O M M U N IC AT IO N
M O D U LE S
H A R M O N Y
B R ID G E
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 10 7 9C
R E P E ATE R
M O U N T IN G
U N IT (R M U )
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
C N E T
R E M OT E
LO C AT IO N