Analog Output - ABB Symphony Harmony Series Instruction

Analog Output

R E D U N D A N T
A IN -120 B A S E
+24 V
+ +
V IN
–
–
IFC
Figure 4-1. AIN-120 Block - Voltage Mode (Differential or Single -Ended)
•
•
•
•
Analog Output
The AOT-150 block has special circuitry that switches the
channels between the primary I/O module and the backup I/O
4 - 4
+
C H 1
–
•
•
•
+
M U X
C H 16
–
R E F 1
R E F 2
A
B
B
A
+
C H 1
–
•
•
•
+
M U X
C H 16
–
R E F 1
R E F 2
A-to-D converter failure (one per channel).
Opto-coupler failure.
Bad voltage reference.
Channel failure or out of range.
A IN -120 M O D U LE
C P U
A N D
A M P A /D
H N E T
IN TE R FAC E
R E D U N DA N C Y LIN K
A IN -120 M O D U LE
R E D U N DA N C Y LIN K
C P U
A N D
A M P A /D
H N E T
IN TE R FAC E
H N E T
A B
T 0323 1A
WBPEEUI240751C0