Digital Electronic Modules
11-7
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Principl e
The following figure illustrates the principle behind flutter monitoring.
Incoming ”flutter error” module
diagnosis
= message
Module diagnostics
”Flutter error” going
= reset
Diagnostics
Process
signal
Detection
3 x monitoring window t = 3xParameter for monitoring window t = x
Parameter for the number of signal transitions = 9
Figure 11-2 Principle of Flutter Monitoring
11.2 2DI 24 VDC ST digital electronic module
(6ES7 131-4BB00 -0AA0)
Order number
6ES7 131-4BB00-0AA0
Features
• Digital electronic module with two inputs
• Rated input voltage 24 V DC
• Suitable for switches and proximity switches (BEROs)
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