ABB Symphony Harmony Series - Section 5 Operating Procedures; Operation

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
HARMONY RACK
COMMUNICATION
MODULES
HARMONY
BRIDGE
CONTROLLER
I/O
BLOCK
ANALOG CONTROL
STATIONS
T01079C
REPEATER
MOUNTING
UNIT (RMU)
I/O H N ET
I/O HNET
HNET
RMU I/O BLOCKS
CNET
REMOTE
LOCATION