Siemens SIMATIC PCS 7 Operating Manual page 103

The structure will be identical to the physical structure in the cabinet at plants.
Note
If there is a space between the slots (For example, one module in slot 4 and the next module
in slot 7), then empty Terminal / Bus modules are created between the modules. Only in
case of ET 200iSP, Reserve modules are created along with Terminal modules.
Naming of power supply in right mouse click functionality
The naming of power supply objects for different ET 200 stations are shown in the table below.
The user has to follow this naming conventions when creating the objects using the right mouse
click functionality.
ET 200 station
ET 200M
Plant Automation Accelerator 3.0
Operating Manual, 04/2019, A5E46351208-AA
Power supply (PS)
Single
Redundant
14.7 Hardware engineering in the Navigator
PS label
PS1
PS1
PS2
Engineering in PAA
PS name
.2
.1
.2
103