Siemens SIMATIC S7-1500 Automation System User Manual

Application planning
4.4 Use of load power supplies
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
37
Response to negative power balance or failure of power supplies
As soon as a negative power balance/overload is detected by the CPU in a power segment,
the following actions are executed:
● CPU stores the retentive data
● CPU enters the event in the diagnostics buffer
● CPU carries out a restart and repeats this until the cause of the negative power balance
is resolved
4.4 Use of load power supplies
The system power supply (PS), central modules (CPU), input and output circuits of the
I/O modules and, if applicable, the sensor technology and final controlling elements are
supplied with 24 VDC through the load current supply (PM).
The load current supply (PM) is available in the following versions:
● PM 70W AC 120/230 V (automatic switchover), 24 VDC / 3 A
● PM 190W AC 120/230 V (automatic switchover), 24 VDC / 8 A
Several load current supplies (PM) can be used as follows for higher output currents:
● Parallel connection of two load current supplies
● Every load current supply feeds independent 24 VDC load lines.
Alternatively an external 24 V power supply from the SITOP spectrum can be used.
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Figure 4-8 Supply of the modules from 24 VDC load power supply
Reference
Further information on load power supplies can be found on the Internet
(http://www.siemens.com/industrymall
) in the online catalog and/or in the online ordering
system.

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