Siemens S5-135U, System Manual

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5-64
System Manual
C79000-G8576-C199-06
5.6.2 Installation and Startup
!
Caution
Switch off the power supply before removing or inserting the module.
The basic board and expansion board of the CPU 928 are one unit and must
not be separated.
Proceed as follows to insert the CPU in the central controller:
Step Action
1 Release 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.
2 Select the correct slot (based on the labelling of the locking bar).
Insert the CPUs in the S5-135U/155U from slot 11.
3 Push the module evenly into the guide rail until the lever over the
locking pin is horizontal.
4 Press the locking pin inwards on the bottom of the module and
rotate it 90
o
clockwise.
5 Secure the upper locking bar.
Proceed as follows to remove the CPU:
Step Action
1 Release the upper locking bar of the central controller.
2 Release the locking pin of the module.
3 Press the release lever downwards and pull the module forwards
and out of the central controller.
Removing and
Inserting the
Module
Insertion
Removal
CPUs, Memory Cards, Memory Submodules, Interface Submodules