Rockwell Automation 1756-OF8I ControlLogix Eight-channel Isolated Analog I/O Modules - Manual (Page 98)

98 Rockwell Automation Publication 1756-UM540A-EN-P - May 2014
Chapter 5 1756-OF8I Isolated Analog Output Module
Module Block and Output
Circuit Diagrams The graphics in this section show the 1756-OF8I module’s block diagrams and
input circuit diagrams.
Figure 20 - 1756-OF8I Module Block Diagram
RIUP
Circuit
DSP
Field Side Backplane Side
1
7
5
6
B
A
C
K
P
L
A
N
E
Channels 1…6 (not shown)
Backplane
ASIC
DC-DC
Shutdown
Circuit
System
+5V
Isolator
DC-DC
Converter
Vref
D/A Converter and
Output Stage
Channel 0
Channel 7
OUT_0/V
OUT_0/I
RTN_0
Isolator
DC-DC
Converter
Vref
D/A Converter and
Output Stage
Isolated Power
Nonvolatile
Memory
Status
Indicators
OUT_7/V
OUT_7/I
RTN_7
Isolated Power
Represents Channel Isolation