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- Siemens
- 6AG1407-0KA02-7AA0
- Power Supply Module
- Germany
- 50 × 290 × 217 mm
- 1.343 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6AG1407-0KA02-7AA0 SIPLUS S7-400 Power Supply Module is a rack-mounted power supply for compatible Siemens S7-400 automation systems. It supplies the operating power required by the automation station and works as part of the electrical infrastructure supporting the CPU, signal modules, and communication modules.
In an S7-400 control cabinet, the power supply is positioned within the rack and works continuously with the rest of the station. It is commonly encountered in process automation, production control, utilities, and other installations where centralized PLC hardware is used for monitoring and control.
The SIPLUS version is suitable for industrial installations where environmental conditions require appropriate ruggedized automation hardware. It can be used as a replacement component in existing S7-400 installations when the electrical and system configuration is compatible.
During maintenance, technicians should check the power supply status together with the rack, incoming supply, backplane connections, and connected modules. This helps distinguish a power-related problem from a CPU, I/O, or communication fault.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1407-0KA02-7AA0 |
| Product Family | SIPLUS S7-400 |
| Product Series | S7-400 |
| Product Type | Power Supply Module |
| Primary Function | Power supply for S7-400 automation system |
| System Role | Rack power supply |
| Application | Industrial automation and process control |
| Installation | S7-400 rack |
| Dimensions | 50 × 290 × 217 mm |
| Weight | 1.343 kg |
Product Features
- SIPLUS power supply module for the Siemens S7-400 platform.
- Supplies operating power for the S7-400 automation rack.
- Integrates with S7-400 CPUs, I/O modules, and communication modules.
- Suitable for industrial automation and process control applications.
- Appropriate for replacement and maintenance of compatible S7-400 installations.
- Forms part of the electrical infrastructure of a centralized PLC station.
- SIPLUS hardware is intended for demanding industrial environments.
Working Principle
The 6AG1407-0KA02-7AA0 receives electrical input from the control cabinet supply and converts it into the operating power required by the S7-400 automation station.
Power Source → 6AG1407-0KA02-7AA0 → S7-400 Rack → CPU / I/O / Communication Modules → Control Process
The power supply does not execute PLC logic or process field signals. Its role is to maintain the electrical operating conditions required by the rack-mounted automation hardware.
When the power supply operates normally, the connected S7-400 modules can receive their required operating power through the rack infrastructure. A fault in this section can consequently affect several modules at once and may appear as a wider system failure.
Role in a Siemens S7-400 Control Architecture
The power supply establishes the power layer between the cabinet supply and the S7-400 automation hardware.
Incoming Supply → SIPLUS Power Supply → S7-400 Rack → CPU / Communication / I/O → Field Devices
| System Element | Function |
|---|---|
| Incoming Power | Supplies electrical energy to the control cabinet |
| 6AG1407-0KA02-7AA0 | Supplies operating power to the S7-400 rack |
| S7-400 Rack | Provides module mounting and electrical interconnection |
| S7-400 CPU | Executes the PLC control program |
| Communication Modules | Exchange data with external automation systems |
| Signal Modules | Interface with field sensors and actuators |
| Engineering Station | Supports PLC configuration and diagnostics |
| Field Equipment | Provides process signals and receives control commands |
The power supply therefore supports the basic operating layer on which the S7-400 control functions depend.
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Automation | Power supply for centralized S7-400 control stations |
| Manufacturing | PLC rack power for production systems |
| Chemical Processing | Industrial process control infrastructure |
| Water Treatment | Centralized PLC-based automation |
| Power and Utilities | Control and monitoring systems |
| Industrial Machinery | S7-400 automation equipment |
| Infrastructure Systems | Centralized control cabinet applications |
| Continuous-Process Plants | PLC control and monitoring |
Installation and Maintenance
- Verify the complete Siemens order number before replacement.
- Confirm compatibility with the existing S7-400 rack configuration.
- Isolate the applicable electrical supply before servicing the module.
- Follow the control cabinet’s electrical safety procedures.
- Inspect the rack interface and backplane connection before installation.
- Check the surrounding wiring for loose or damaged connections.
- Install the power supply in the designated rack position.
- Make sure the module is properly seated and secured.
- Restore the electrical supply according to the approved commissioning procedure.
- Check the module status indicators after startup.
- Review CPU and rack diagnostics for related power faults.
- Record the replacement and observed operating condition during maintenance.
If a new power supply does not resolve a rack-wide fault, inspect the incoming supply, rack connections, backplane, and other connected modules before replacing additional hardware.
Related Components
| Component | Function |
|---|---|
| Siemens S7-400 CPU | Executes PLC control logic |
| S7-400 Rack | Provides mounting and backplane interconnection |
| S7-400 Digital Input Module | Acquires discrete field signals |
| S7-400 Digital Output Module | Controls discrete field devices |
| S7-400 Analog Input Module | Acquires analog process signals |
| S7-400 Analog Output Module | Sends analog control signals |
| S7-400 Communication Module | Provides communication with external systems |
| SIPLUS S7-400 Modules | Supports demanding industrial automation installations |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Siemens 6AG1405 SIPLUS S7-400 | Power Supply Module | S7-400 rack power |
| Siemens 6AG1407 SIPLUS S7-400 | Power Supply Module | S7-400 rack power |
| Siemens SIPLUS S7-400 CPU Modules | CPU Module | PLC control execution |
| Siemens SIPLUS S7-400 Digital I/O Modules | I/O Module | Field signal processing |
| Siemens SIPLUS S7-400 Analog I/O Modules | Analog I/O Module | Process measurement and control |
| Siemens SIPLUS S7-400 Communication Modules | Communication Module | Industrial network communication |
Key Advantages
- SIPLUS power supply solution for compatible S7-400 systems.
- Supports centralized power distribution within the automation rack.
- Integrates with the established S7-400 control architecture.
- Suitable for industrial automation and process control.
- Useful for replacement and maintenance of existing S7-400 stations.
- Supports operation of connected CPU, I/O, and communication modules.
- Suitable for demanding industrial installation environments.
Technical FAQs
What role does this power supply have when several S7-400 modules stop operating simultaneously?
A rack power supply fault can affect multiple modules because they depend on the same power infrastructure. If several modules become unavailable at the same time, the power supply and its associated connections should be checked before assuming that each individual module has failed.
How should a replacement power supply be evaluated during commissioning?
After installation, technicians should check the module status, verify normal rack operation, and review CPU or system diagnostics. The connected modules should then be checked to confirm that the automation station has returned to normal operation.
What conditions can cause intermittent power-related faults in an S7-400 rack?
Loose connections, unstable cabinet power, poor rack contacts, wiring problems, or environmental conditions can contribute to intermittent faults. A fault that disappears and returns should be investigated across the complete power path rather than by repeatedly replacing modules.
When is a SIPLUS power supply preferable to standard S7-400 hardware?
The SIPLUS range is intended for industrial applications with more demanding environmental requirements. Selection should be based on the actual installation conditions and the environmental specifications applicable to the complete automation system.