Siemens SIMATIC S7-1500 Automation System User Manual

Application planning
4.2 System and load power supply
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
33
Reference
Information about the required lines is available in the section Power balance calculation
(Page 35).
Further information on the
performance values (power feed, power consumption) of the
CPU, of the system power supply, and of the I/O modules can be found in the Manuals
(http://support.automation.siemens.com
/WW/view/en/57251228) of the respective modules.
4.2.2 Special considerations for the use of a system power supply in the first power
segment
There are three options for the infeed of the system power supply:
● Infeed via CPU
● Infeed via CPU and system power supply
● Infeed via system power supply only
Infeed via CPU
Infeed via the CPU generally suffices for small and medium hardware configurations. The
power consumption of the connected modules must not be greater than 10 or 12 W
(depending on the CPU used).
In this configuration variant, supply the CPU with 24 VDC from a load current supply.
Parameter assignment of the CPU: Select the "Connection to supply voltage L+" option in
STEP 7 in the "Properties" tab in the "System power supply" area navigation so that the
power balance of STEP 7 can be calculated correctly.
Figure 4-4 Supply voltage via CPU only

Siemens SIMATIC S7-1500 Automation System Specifications

General

Series	SIMATIC S7-1500
Programming	TIA Portal (Totally Integrated Automation Portal)
Protection Class	IP20
CPU	Various models available (e.g., CPU 1511-1 PN, CPU 1518-4 PN/DP)
Controller Type	Modular Controller
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Communication Interfaces	PROFINET, PROFIBUS, Ethernet, OPC UA
Digital Inputs	Varies by model and expansion modules
Digital Outputs	Varies by model and expansion modules
Analog Inputs	Varies by model and expansion modules
Analog Outputs	Varies by model and expansion modules
Backplane Bus	High-speed backplane bus for fast communication between modules
Redundancy	Supported with specific models and configurations
Safety	Integrated safety functions available
Scalability	Highly scalable with modular expansion
Operating Temperature	0°C to 60°C