Siemens SIMATIC ET 200M Operating Instructions Manual page 140

Functions
8.2 Time stamping the input signals with IM 153-2
Example structure for time stamping signal changes with IM 153-2
Figure 8-9
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Example structure for time stamping signal changes with IM 153-2
WinCC Operator station (OS) for unit visualization
Industrial Ethernet
Time master (SICLOCK)
ET 200M Distributed I/O
SM 321 digital input module (6ES7321-7BH...)
CP 443-5 (DP master)
PROFIBUS DP
CP 443-1
S7-400 automation system
Optional: RS 485 repeater
Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M