Types Of Flex I/O Modules - Allen-Bradley 1794-IF4I User Manual

12 Overview of FLEX I/O and your Analog Modules

Types of FLEX I/O Modules

Catalog Number
1794-IF4I
1794-OF4I
1794-IF2XOF2I
Publication 1794-6.5.8 - January 2010
We describe the following FLEX I/O Analog modules in this user man-
ual:
Voltage Inputs
24V dc 4
24V dc –
24V dc 2
FLEX I/O analog input, output and combination modules are block
transfer modules that interface analog signals with any Allen-Bradley
programmable controllers that have block transfer capability. Block
transfer programming moves input from the module's memory to a
designated area in the processor data table, and output data words
from a designated area in the processor data table to the module's
memory. Block transfer programming also moves configuration words
from the processor data table to module memory.
The analog modules have selectable ranges as shown in the table
below:
Input Values Data Format
4–20mA signed 2's complement
±10V signed 2's complement
±5V signed 2's complement
0–20mA signed 2's complement %
4-20mA signed 2's complement %
0–10V signed 2's complement %
±10V signed 2's complement %
0–20mA
4–20mA
0–10V
0–5V
±20mA offset binary, 8000H = 0mA
4–20mA offset binary, 8000H = 4mA
±10V offset binary, 8000H = 0V
±5V offset binary, 8000H = 0V
Outputs Description
– analog – 4 input, isolated
4 analog – 4 output, isolated
2 analog – 2 input, isolated and 2 output, isolated
Underrange/Overrange
4% Underrange, 4% Overrange
2% Underrange, 2% Overrange
4% Underrange, 4% Overrange
0% Underrange, 4% Overrange
4% Underrange, 4% Overrange
0% Underrange, 2% Overrange
2% Underrange, 2% Overrange
binary 0% Underrange, 4% Overrange
binary 4% Underrange, 4% Overrange
binary 0% Underrange, 2% Overrange
binary 0% Underrange, 4% Overrange
4% Underrange, 4% Overrange
4% Underrange, 4% Overrange
2% Underrange, 2% Overrange
4% Underrange, 4% Overrange