Siemens SIMATIC S7-1500 System Manual page 57

Installation
5.6 Installing I/O modules
Installing the CPU
1. Insert a U-connector into the back right on the CPU.
2. Install the CPU on the mounting rail and slide the CPU up to the left-hand system power
supply.
3. Ensure that the U-connector is inserted at the system power supply. Swivel the CPU in to
the rear.
4. Fasten the CPU (torque 1.5 Nm).
Figure 5-6
Uninstalling the CPU
The CPU is wired, and is followed by additional modules.
1. Open the front cover.
2. Switch the CPU into STOP mode.
3. Turn off the fed supply voltage.
4. Pull off the connector for the supply voltage.
5. Loosen the bus connectors for PROFIBUS/PROFINET with the screwdriver, and remove
them from the CPU.
6. Undo the CPU's fixing screw(s).
7. Pivot the CPU out of the mounting rail.
56
Installing the CPU
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB