Siemens SIMATIC ET 200AL, System Manual

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Wiring
3.3 Connecting the M12 eCoding plug
Digital I/O module F-DI 4+F-DQ 2x24VDC/2A, 4xM12 (6ES7146-5FF00-0BA0)
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Equipment Manual, V1.0, 05/2021, A5E51082342-AA
Install the eCoding plug into the M12 socket at X40 with a torque of 1 Nm. Do not
overtighten the eCoding plug as it could damage the threading.
WARNING
If you remove/insert the eCoding plug with the power connected, this can lead to
undefined states in your system.
Death or serious personal injury and damage to the fail-safe module and associated
machines/equipment may result if proper precautions are not taken.
Only remove or replace the eCoding plug when the power is disconnected. Always comply
with the required standards and safety guidelines when configuring a system.
Note
When replacing the F-DI 4/F-DQ 2 Fail-Safe module, transfer the eCoding plug of the failed
module to the replacement module to retain the PROFIsafe addresses stored in the eCoding
plug. Otherwise, use STEP 7 to configure the PROFIsafe address in the replacement module.
Ensure that the eCoding plug is not accidentally inserted in a module other than the intended
F-DI 4/F-DQ 2 Fail-Safe module.