Rockwell Automation 1756-XXXX ControlLogix Analog I/O Modules - Manual (Page 172)

172 Publication 1756-UM009C-EN-P - December 2010
Chapter 8 Isolated Analog Output Modules (1756-OF6CI and 1756-OF6VI)
Use Module Block and
Output Circuit Diagrams This section shows the 1756-OF6CI and 1756-OF6VI modules’ block
diagrams and output circuit diagrams.
1756-OF6CI Module Block Diagram
DC-DC
Converter
D/A Converter
RIUP
Circuit
43501
Vref
Optos
Micro-
controller Backplane
ASIC
Serial
EEPROM
FLASH
ROM SRAM
System
+5V
Field Side Backplane Side
DC-DC
Shutdown
Circuit
+/- 15V
+ 5V
Details of the 1756-OF6CI output
circuitry are on
page 174 .
Current
Regulator
Current
Regulator
Current
Regulator
DC-DC
Converter
D/A Converter
Vref
Optos
+/- 15V
+ 5V
DC-DC
Converter
D/A Converter
Vref
Optos
+/- 15V
+ 5V
3 of 6 channels = Channel Isolation