Installation And Startup; Removing And Inserting The Module - Siemens S5-155U System Manual

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5.3.2

Installation and Startup

Removing and inserting the
module
Insertion
Removal
System Manual
C79000-B8576-C199-03
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
o
and rotate it 90
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.
CPU 928
5
5 - 35

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