Siemens S5-135U/155U Installation and Startup, Removing Inserting Module Insertion Removal

CPUs, Memory Cards, Memory Submodules, Interface Submodules

5.5.2 Installation and Startup

Removing and

Inserting the

Module

!

Insertion

Removal

Caution

Switch off the power supply before removing or inserting the module.

Proceed as follows to insert the CPU in the central controller:

Step Action

1Release the upper locking bar of the central controller and ensure that the locking pin for the module is correctly positioned with the slot-head horizontal.

2Select the correct slot (based on the labelling of the locking bar). Insert the CPUs in the S5-135U/155U from slot 11.

3Push the module evenly into the guide rail until the lever over the locking pin is horizontal.

4Press the locking pin inwards on the bottom of the module and rotate it 90o clockwise.

5Secure the upper locking bar.

Note

If you install the CPU 928 -3UA21 as the replacement for a double-width CPU, you must cover the slot which has been freed up with a blanking plate.

Proceed as follows to remove the CPU:

Step Action

1Release the upper locking bar of the central controller.

2Release the locking pin of the module.

3Press the release lever downwards and pull the module forwards and out of the central controller.

5-56	System Manual
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