Rockwell Automation 1756-IF4FXOF2F ControlLogix High-speed Analog I/O Module - Manual (Page 133)

Rockwell Automation Publication 1756-UM005B-EN-P - January 2013 133
Appendix
D
Simplified Circuit Schematics
Module Block Diagram The figure below shows a block diagram for the ControlLogix high-speed analog
I/O module.
Topic Page
Module Block Diagram 133
Input Channel Circuits 134
Output Channel Circuits 135
+ IN-0/V
14-bit
ADC
43213
Backplane Side Field Side
14-bit
ADC
14-bit
ADC
14-bit
ADC
14-bit
DAC
14-bit
DAC
Vref
Vref
– IN-0
+ IN-1/V
– IN-1
+ IN-2/V
– IN-2
+ IN-3/V
– IN-3
V out-0
I out-0
V out-1
I out-1
RTN-0
RTN-1
+ 20V
+/– 15V
+ 5V
Data
Data
Data
Data
Convert
Data
FLASH
ROM SRAM
O
P
T
O
C
O
U
P
LE
R
S
DSP
Dual
Port
RAM
DC-DC
Converter
DC-DC
Shutdown
Circuit
Serial
EEPROM
BP ASIC
RIUP
Circuit
C
O
N
T
R
O
LL
O
GI
X
B
A
C
K
P
L
A
N
E
Output
Data
Convert
Input
Data