Siemens SIMATIC S7-1500 Manual page 13

Mounting
Mounting the mounting rail
Note
No screws behind the active backplane bus
Note that behind the active backplane bus, no screws are available for mounting the
mounting rail. Otherwise, the active backplane bus cannot be mounted.
System power supply
With active backplane bus, a system power supply supplies power to the entire station. Which
means also to the I/O modules plugged in to the left of the bus. You can plug the system
power supply into any slot to the right of the interface module.
Note
System power supply
You must not plug any system power supply to the left of the interface module.
Place the active backplane bus in the mounting rail and mount the modules
Below we will show you how to mount the active backplane bus.
1. Tilt the active backplane bus forward and insert it diagonally into the mounting rail.
2. Push the active backplane bus backwards.
Figure 3-1
12
Insert the active backplane bus into the mounting rail
Active backplane bus ST 1+12 slot, active backplane bus ST 1+8 slot, active backplane bus ST 1+4 slot
Equipment Manual, 07/2020, A5E46240468-AB