ABB Symphony Harmony Series, Инструкция, Страница: 159 / 402

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