Input/Output - ABB Symphony Harmony Series Instruction

Input/Output

H A R M O N Y
C O N TR O LLE R
I/O H N E T (R E D U N DA N T )
R M U
W IT H H N E T
R E P E AT E R S
H N ET
(R E D U N DA N T)
TO R E M OT E
I/O B LO C K S
LE G E N D :
A IN = A N A LO G IN P U T
AOT = A N A LO G O U T P U T
C IO = C O N T R O L IN P U T /O U T P U T
D IO = D IG ITA L IN P U T /O U T P U T
D OT = D IG ITA L O U T P U T
Figure 1-3. Harmony I/O System
The Harmony I/O system is powered by redundant 24 VDC
and provides for separate distribution of field power. The I/O
system can be powered by the Modular Power System II.
One or more control enclosures house all I/O system compo-
nents. The block mounting hardware within the enclosure
supports a variety of arrangements. Small cabinet or enclosure
mounting is also supported.
Although not specifically part of the Harmony I/O system,
analog control stations (SAC) can connect and communicate
through CIO blocks as shown in Figure 1-3. Communication is
over an RS-485 serial station link.
Input/Output
The Harmony I/O system supports a variety of input/output
blocks to interface analog, digital, and control I/O. Table
1 - 4
A IN
C IO C IO
S AC
H N ET = H A R M O N Y C O M M U N IC AT IO N S N E T W O R K
R LY = R E LAY A S S E M B LY
R M U = R E P E AT E R M O U N T IN G U N IT
S AC = A N A LO G C O N T R O L S TAT IO N
AOT D OT
D IO
WBPEEUI240751C0
D IO
R LY
T 02056B
1-1