Rockwell Automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual - Manual (Page 21)

19 Publication 1794-UM061A-EN-P - July 2006
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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 19
Diagnostic Fault Detection 21
Indicator Status Information 2
Module Limitations 24
Configure Your Diagnostic Input Module 26