Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module - Manual (Page 10)

Overview of the Input Module
Chapter 1
1-2
Table 1.A
Program Selectable Input Ranges
Voltage Ranges Current Ranges
1 to 5V dc 4 to 20mA
0 to 5V dc 0 to 20mA
-5 to +5V dc -20 to +20mA
-10 to +10V dc
0 to 10V dc
The processor transfers data to the module (block transfer write, BTW) and
from the module (block transfer read, BTR) 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 (Figure 1.1).
1. The processor transfers your configuration data, and alarm values to
the module via a block transfer write instruction.
2. External devices generate analog signals that are transmitted to the
module.
Figure 1.1
Communication Between Processor and Module
Programmable Controller
I/O Chassis
Backplane
1
3
Input Module
Cat. No. 1771-IL/B
+
-
2 4
5 6
11845-I
How Analog Modules
Communicate with
Programmable Controllers