Rockwell Automation Allen-Bradley 1794-IB16D - Chapter 2: FLEX I;O Diagnostic Input Module; About the 1794-IB16 D Diagnostic Input Module

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 21
Chapter 2
About the FLEX I/O Diagnostic Input Module
Introduction
In this chapter, you will learn about the diagnostic input module, cat. no.
1794-IB16D.
About the 1794-IB16D
Diagnostic Input Module
The 1794-IB16D diagnostic input module provides 16 points of 24V DC
sinking inputs with open-wire, short-circuit, and user supply reverse polarity
diagnostic features. Each input signal has an associated sensor power connection.
The module monitors current and voltage at each input channel sensor power
terminal.
The module detects:
• an open fault if the sensor-power current drops.
• a short fault if the sensor-power voltage goes low.
• a reverse-polarity fault if reverse voltage is applied to the user terminals.
For Information About See Page
About the 1794-IB16D Diagnostic Input Module 21
Diagnostic Fault Detection 23
Indicator Status Information 25
Module Limitations 26
Configure Your Diagnostic Input Module 28