Rockwell Automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Module - Manual (Page 10)

Chapter
1
1-1
Overview of the Analog Input Module
This chapter gives you information on:
features of the module
how the input module communicates with programmable
controllers
The Analog input module is an intelligent block transfer module that
interfaces analog input signals with any Allen-Bradley programmable
controllers that have block transfer capability. Block transfer programming
moves input data words from the module’s memory to a designated area in
the processor data table in a single scan. It also moves configuration words
from the processor data table to module memory.
The input module is a single-slot module and requires no external power
supply. (If using passive transducers for input, the user must supply loop
power.) After scanning the analog inputs, the input data is converted to a
specified data type in a digital format to be transferred to the processor’s
data table on request. The block transfer mode is disabled until this input
scan is complete. Consequently, the minimum interval between block
transfer reads is the same as the total input update time for each analog
input module.
The Analog input module senses up to 16 single-ended or 8 differential
analog inputs and converts them to a proportional four-digit BCD or
twelve-bit binary value. You can select from five voltage or three current
input ranges. Each input can be configured as a current or voltage input
with internal jumpers.
This module’s features include:
16 single-ended or 8 differential inputs on one card
User program selectable input ranges on a per channel basis (Table 1.A)
Selectable real-time sampling
Selectable scaling to engineering units
Selectable digital filtering
Selectable data format
Chapter Objectives
Module Description
Features