Rockwell Automation 1771-IFF/A,D17716.5.116 FAST ANALOG INPUT MODULE - Manual (Page 28)

3–2 Overview of the Fast Analog Input Module
Publication 1771Ć6.5.116 - May 1996
Program Selectable Input Ranges
Voltage Current
1 to 5V dc 4 to 20mA
0 to 5V dc 0 to 20mA
Ć5 to +5V dc Ć20 to +20mA
Ć10 to +10V dc
0 to 10V dc
The processor transfers data to the module (block transfer write) and
from the module (block transfer read) using BTW and BTR
instructions in your ladder diagram program. These instructions let
the processor obtain input values and status from the module, and let
you establish the module’s mode of operation.
1. The processor transfers your configuration data to the module via
a block transfer write instruction.
2. External devices generate analog signals that are transmitted to
the module.
Communication Between Processor and Module
PC Processor
I/O Chassis
Backplane
1
3
Fast Analog Input
Module
Cat. No. 1771-IFF
+
Ć
2
4
5 6
10947ĆI
How Analog Modules
Communicate with
Programmable Controllers