Siemens S5-155U System Manual page 174

Insertion
Removal
System Manual
C79000-B8576-C199-03
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.
Note
Only operate the CPU 928B with the submodule receptacle
closed. You close it either by fitting an interface submodule or
with the cover supplied.
Please tighten both screws (EMC)!
CPU 928B
5
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