Rockwell Automation 1756-IF4FXOF2F ControlLogix High-speed Analog I/O Module - Manual (Page 134)

134 Rockwell Automation Publication 1756-UM005B-EN-P - January 2013
Appendix D Simplified Circuit Schematics
Input Channel Circuits The ControlLogix high-speed analog I/O module uses four input channels
(0…3). The figure below shows the simplified schematic for each input channel.
IMPORTANT The figure shows the circuit for input channel 0. Input channels 1…3 are
exactly the same with the exception that the terminals on the left side of the
circuit are labelled for each specific channel. For example, channel 1 uses
+ IN-1/V, IN-1/I and – IN-1.
+ 15V
10 K 10 K + IN-0/V
IN-0/I
– IN-0
249
Ω
1/4W
20 M
Ω
20 M
Ω
330 pFd 330 pFd
10 K 10 K
– 15V
+
–
0.047 uFd
10 K
511
Channel 0
14-bit
ADC
43212