Siemens Simatic S7-1500R System Manual page 120

Connecting the CPU to a load power supply
Watch the video sequence
(https://support.industry.siemens.com/cs/media/78027451_S7_1500_gs_wire_web_en/start.h
tm)
To connect the supply voltage, follow these steps:
1. Open the front cover of the load power supply. Pull the 24 V DC output terminal down and
off.
2. Wire the 24 V DC output terminal to the wires of the CPU 4-pin connector.
3. Connect the load power supply to the CPU.
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
5.7 Connecting the CPU to the load power supply
Wiring
119