Siemens SIMATIC ET 200S Manual - Page 22

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Siemens SIMATIC ET 200S Manual
Connecting

5.2 Wiring unused channels of the analog input modules

5.2
Wiring unused channels of the analog input modules
Rules
Pay attention to the following instructions when wiring unused channels:
● "Deactivate" unused input channels when assigning parameters.
● A deactivated channel always returns the value 7FFF
● The module cycle time is halved with the 2 AI I 4WIRE ST modules.
5.3

Using the shield connection

Rules
To prevent interference we recommend the following for analog electronic modules:
● Use shielded wires to the sensors and actuators.
● Lay out the wire shields on the shield connection.
● Connect the shield connection to the ground bus with low impedance.
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2AI I 4WIRE ST analog electronic module (6ES7134-4GB11-0AB0)
Manual, 04/2007, A5E01076100-01