SITOP PSU8600 – Ask your power supply

The power supply system for the automation

The SITOP PSU8600 power supply system offers full integration into automation systems – via PROFINET in Totally Integrated Automation (TIA) or via Industrial Ethernet with open communication in OPC UA. Operational data is recorded and can therefore provide diagnostic and maintenance information. With its unique functionality and communication capability, the SITOP PSU8600 power supply system is an ideal entry point into the digital enterprise.

Product selection and configurator for automation technology

To the TIA Selection Tool

Overview of SITOP

Integrated power supply and system

Complex facilities place high demands on the efficiency, flexibility, and reliability of their components. The innovative SITOP PSU8600 power supply system satisfies them all – thanks to its unique functionality, diagnostic capability, full integration in TIA, open communication networks, and modular expandability.

The SITOP power supply system includes the basic SITOP PSU8600 units, the SITOP CNX8600 expansion units, the SITOP BUF8600 buffer modules, and the SITOP UPS8600 UPS module with BAT8600 battery modules. 


The modular system toolbox can be fully integrated into automation landscapes and the Totally Integrated Automation Portal (TIA Portal). Communication via the Ethernet/PROFINET or OPC UA interface is easy. In addition to its operating and monitoring processes, you can use the SITOP Manager to set parameters. Use the integrated web server for remote access. A new basic device now also allows integration into EtherNet/IP networks, which are mainly used in the North American market.

Overview of all system components

SITOP PSU8600 base units

(1- and 3-phase)

Strong performance in the smallest space

The high efficiency of the base units (up to 94 percent) ensures minimum heat loss, which means very compact structures can be used. Up to four outputs monitored for overload also save space for circuit-breaking devices. PROFINET/Industrial Ethernet communication (PN/IE) creates new opportunities for diagnostics and broadens the range of applications for your power supply and with the new 3-phase basic unit SITOP PSU8600 4 x 10 A EIP now also in EtherNet/IP networks.

SITOP CNX8600 expansion modules

More outputs for more flexibility

The expansion modules can be used to expand the base units with up to 32 additional, selectively monitored outputs. Connect them to the top of the modules using the System Clip Link, a connector for system data and power supply, with no wiring overheads.

SITOP BUF8600 buffer modules

Bridging brief and longer power failures

ZBuffer modules with electrolytic capacitors that can buffer up to 600 ms at a load current of 40 A can be used to protect against brief power dips on the line side (brownouts). The versions with double-layer capacitors (UltraCaps) buffer against longer outages, up to 20 s at 40 A. Because the buffer time is longer for lower buffer currents, this allows devices like industrial PCs to be shut down manually as required.

SITOP UPS8600 UPS module with BAT8600 battery modules

Bridging longer power failures in the minute to hour range at full system power

A UPS module with the appropriate battery modules can be used to protect against longer power dips on the line side. This enables bridging of power failures in the minute to hour range. In the event of a power failure, these add-on modules let you power the plant down safely while maintaining control. For most interruptions to the power supply, the bridging time is long enough to enable the plant to continue running without disruption.

Benefits at a glance

All the important data at a glance:

Brochure SITOP PSU8600


The SITOP PSU8600 power supply system

Seamless integration directly into the automation, and maximum flexibility thanks to the practical system toolbox.
References and applications

SITOP PSU8600 in practical use

From engineering to operation, the powerful, modular SITOP PSU8600 power supply system gives users many advantages when supplying DC power for plants and machines.
Links and information

SITOP Manager, TIA Selection Tool, and more information

SITOP Manager: The tool for commissioning, engineering, and monitoring

With the SITOP Manager software, all power supply systems in a network can be parameterized and diagnosed using a PC with the Windows 7 or 10 or Industrial OS operating system. This is ideal especially if the system configuration and programming aren’t performed in the TIA Portal or SIMATIC Step 7.


Communication between the SITOP Manager and the power supply takes place via OPC UA, the open, manufacturer vendor-independent, and Ethernet-based communication standard. Thanks to the Web browser-based user interface, the application can also run on mobile devices and automatically adapts to the display size.

Downloads, Support, Services

Additional information for all cases

Download brochures and documentation with more details on the SITOP PSU8600 power supply system here. Support links take you to system-specific FAQs, manuals, product notes and technical data. Discover our range of practical services at the same time.

The fastest way to the experts

Proposed solutions for your queries and direct access to our experts in Technical Support

Special investigation

Special investigations analyze the causes of problems that have been occurring more frequently with no explanation.

Logistical handling of returned goods from service processes

Central returns processing at the Service Logistics Center in Erlangen

Return delivery address: Siemens AG Retouren Center c/o Geis Industrie-Service GmbH, Tor 1-4, Kraftwerkstr. 25a, 91056 Erlangen, Germany


Any questions?

Our experts will be happy to answer your questions about modular SITOP PSU8600 technology power supplies. Contact us!