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- Siemens
- 6AG1405-0KR02-7AA0
- Power Supply Module
- Germany
- 50 × 290 × 217 mm
- 1.385 kg
- Xiamen, China
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Product Overview
The Siemens 6AG1405-0KR02-7AA0 SIPLUS S7-400 Power Supply Module is a power supply component for the SIPLUS S7-400 automation platform. It supplies the required operating power to the connected S7-400 system and supports stable operation of the central automation hardware.
In an industrial control cabinet, the power supply module is installed as part of the S7-400 rack and works with the CPU, interface modules, signal modules, and other rack components. Its role is particularly important in control systems where the automation rack must remain continuously powered during process operation.
The SIPLUS version is intended for industrial environments where equipment may be exposed to conditions beyond those normally encountered in standard indoor control cabinets. It can therefore be considered when specifying S7-400 hardware for demanding automation installations.
For replacement work, the exact Siemens order number should be checked against the existing power supply module and the configuration of the S7-400 rack. The power supply should also be evaluated together with the rack backplane and connected modules during commissioning or troubleshooting.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1405-0KR02-7AA0 |
| 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 control systems |
| Installation | S7-400 rack |
| Dimensions | 50 × 290 × 217 mm |
| Weight | 1.385 kg |
Product Features
- SIPLUS power supply module for the Siemens S7-400 automation platform.
- Supplies operating power to the S7-400 rack system.
- Suitable for industrial automation and process control applications.
- Integrates with the S7-400 rack architecture.
- Supports centralized power distribution within the automation station.
- Suitable for system replacement, maintenance, and control cabinet upgrades.
- SIPLUS product family is intended for demanding industrial operating environments.
Working Principle
The 6AG1405-0KR02-7AA0 receives the applicable supply input and converts it into the operating power required by the S7-400 rack. The resulting power is distributed through the rack architecture to the connected automation modules.
Power Source → 6AG1405-0KR02-7AA0 → S7-400 Rack → CPU / I/O Modules → Control Process
The power supply module does not perform PLC logic processing. Instead, it establishes the electrical operating conditions required for the CPU and other rack-mounted modules to function.
During system operation, the power supply works continuously with the rack and connected modules. A power-related fault can affect multiple modules simultaneously, making the power supply one of the first areas to check when an entire rack or group of modules loses operation.
Role in a Siemens S7-400 Control Architecture
The power supply module forms the power layer of the S7-400 automation station. It works alongside the rack, CPU, communication modules, and signal modules to maintain the operating environment for the control system.
Incoming Power → SIPLUS Power Supply → S7-400 Rack → CPU → Communication / I/O Modules → Field Equipment
| System Element | Function |
|---|---|
| Power Source | Provides electrical input to the automation station |
| 6AG1405-0KR02-7AA0 | Supplies operating power to the S7-400 rack |
| S7-400 Rack | Provides the mounting and electrical backplane structure |
| S7-400 CPU | Executes the PLC control program |
| Communication Module | Exchanges data with other automation systems |
| Signal Modules | Interface with field sensors and actuators |
| Engineering System | Provides configuration, programming, and diagnostics |
| Field Equipment | Executes or measures the controlled process |
A stable power layer is necessary for the CPU and associated modules to maintain normal control and communication functions.
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Automation | Power supply for S7-400 control stations |
| Manufacturing Lines | PLC rack power for production control |
| Industrial Machinery | Central automation system power |
| Chemical Processing | Process control cabinet applications |
| Power and Utility Systems | Automation and monitoring infrastructure |
| Water and Wastewater | PLC-based process control |
| Infrastructure Automation | Centralized control equipment |
| Industrial Control Cabinets | S7-400 rack power distribution |
Installation and Maintenance
- Verify the complete Siemens order number before replacement.
- Confirm that the module is suitable for the existing S7-400 rack configuration.
- Isolate the relevant electrical supply before removing the existing module.
- Follow the applicable electrical safety procedures for the control cabinet.
- Inspect the rack and backplane interface for contamination or mechanical damage.
- Install the power supply module in the specified rack position.
- Ensure that the module is properly seated and mechanically secured.
- Check the associated rack wiring and supply connections.
- Restore power according to the approved commissioning procedure.
- Observe the module status indicators after startup.
- Check the CPU and connected modules for related power or diagnostic faults.
- Record the replacement module and maintenance condition for future service work.
If the S7-400 rack repeatedly loses power or shows abnormal module behavior, inspect the incoming supply, rack connections, power supply status, and connected module load rather than replacing the power supply without further diagnosis.
Related Components
| Component | Function |
|---|---|
| Siemens S7-400 CPU | Executes the PLC control program |
| S7-400 Rack | Provides module mounting and backplane communication |
| 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 industrial network communication |
| SIPLUS S7-400 Components | Supports demanding industrial automation installations |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Siemens SIPLUS S7-400 Power Supply Modules | Power Supply Module | S7-400 rack power |
| Siemens S7-400 CPU Modules | CPU Module | PLC program execution |
| Siemens S7-400 Digital Input Modules | Digital Input Module | Discrete signal acquisition |
| Siemens S7-400 Digital Output Modules | Digital Output Module | Discrete actuator control |
| Siemens S7-400 Analog Input Modules | Analog Input Module | Process signal acquisition |
| Siemens S7-400 Communication Modules | Communication Module | Industrial network communication |
Key Advantages
- SIPLUS power supply solution for S7-400 automation systems.
- Supports centralized power delivery within the S7-400 rack.
- Integrates directly into the established S7-400 control architecture.
- Suitable for industrial process and machine automation.
- Useful for maintenance and replacement of existing S7-400 power supply hardware.
- Supports stable operation of rack-mounted CPUs and I/O modules.
- SIPLUS platform is suitable for demanding industrial installation conditions.
Technical FAQs
How can a power supply fault be distinguished from an S7-400 CPU fault?
A power supply problem can affect several rack modules at the same time, while a CPU-specific fault may leave other rack functions powered normally. Checking the power supply status indicators together with CPU diagnostics can help separate the two conditions.
What effect can an unstable power source have on an S7-400 automation station?
Unstable input power can lead to unexpected resets, module diagnostic events, communication interruptions, or loss of control operation. The incoming supply should therefore be checked when power-related faults occur repeatedly.
Why should the S7-400 rack and backplane be inspected when replacing the power supply?
The power supply interfaces directly with the rack infrastructure. Poor contact, contamination, mechanical damage, or an issue with the rack connection can produce symptoms that appear to be caused by the power supply itself.
Is the SIPLUS version relevant when an S7-400 system is installed in a demanding industrial environment?
Yes. SIPLUS products are intended for applications with more demanding environmental requirements than standard automation hardware. The environmental conditions of the installation should be considered when selecting replacement or new hardware.