Siemens S5-135U/155U - Manual (Page 173)

5-33
System Manual
C79000-G8576-C199-06
5.3.2 Installation and Startup
Note
All jumpers on the CPU 928B are required by the manufacturer for quality
testing. You must not change the jumper settings.
!
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
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
_ clockwise.
5 Secure the upper locking bar.
Note
If you install the CPU 928B -3UB21 as the replacement for a double-width
CPU 928 or 928B, you must cover the slot which has been freed up with a
blanking plate.
Jumper Settings
Removing and
Inserting the
Module
Insertion
CPUs, Memory Cards, Memory Submodules, Interface Submodules