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- Siemens
- 6AG1405-0KA02-7AA0
- Power Supply Module
- Germany
- 50 × 290 × 217 mm
- 1.339 kg
- Xiamen, China
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Product Overview
The Siemens 6AG1405-0KA02-7AA0 SIPLUS S7-400 Power Supply Module is used to supply the operating power required by compatible SIMATIC S7-400 automation hardware. It forms part of the power section of the PLC station and is installed alongside the CPU, communication modules, and I/O modules within the S7-400 system.
In a process-control cabinet, the module supplies the rack with the required system power so that the installed S7-400 electronics can operate as a coordinated automation station. It is commonly relevant in centralized PLC installations where continuous operation of the controller depends on a correctly configured power supply module.
For maintenance or replacement work, the complete 6AG1405-0KA02-7AA0 order number should be checked against the existing module. Engineers should also verify the rack configuration, supply arrangement, connected S7-400 modules, and cabinet wiring before replacing an installed power supply.
Technical Specifications
| ParameterSpecification | |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1405-0KA02-7AA0 |
| Product Family | SIPLUS S7-400 |
| Product Type | Power Supply Module |
| System | SIMATIC S7-400 |
| Primary Function | S7-400 System Power Supply |
| Application | Industrial Automation / Process Control |
| Installation | S7-400 Rack |
| Dimensions | 50 × 290 × 217 mm |
| Weight | 1.339 kg |
Product Features
- Siemens SIPLUS S7-400 Power Supply Module
- Model 6AG1405-0KA02-7AA0
- Intended for SIMATIC S7-400 automation systems
- Supplies power for the S7-400 system hardware
- Installed as part of the S7-400 rack configuration
- Suitable for centralized PLC control stations
- Applicable to industrial automation and process-control systems
- Useful for S7-400 maintenance and replacement projects
- Supports the operation of connected S7-400 system modules
- Suitable for existing S7-400 control cabinet installations
Working Principle
The 6AG1405-0KA02-7AA0 converts the incoming electrical supply into the system power required by the S7-400 automation hardware.
Incoming Power → 6AG1405-0KA02-7AA0 → S7-400 Rack / Backplane → CPU / I/O / Communication Modules
After installation in the S7-400 rack, the power supply module feeds the system through the rack’s internal power distribution and backplane arrangement. The CPU, I/O modules, and communication modules then receive the operating power required for their respective functions.
The power supply is therefore one of the first hardware elements to check when an S7-400 station shows a complete loss of operation or multiple modules simultaneously report power-related faults.
Typical functions associated with the power section include:
- Supplying operating power to the S7-400 station
- Supporting the operation of the CPU
- Supplying connected S7-400 system modules
- Maintaining the electrical supply within the rack
- Supporting normal startup of the automation station
The actual power arrangement depends on the S7-400 rack configuration and the modules installed in the system.
Role in a S7-400 Control Architecture
The 6AG1405-0KA02-7AA0 occupies the power-supply layer of an S7-400 PLC architecture.
Incoming Electrical Supply → S7-400 Power Supply → Rack / Backplane → CPU & Modules → Field Devices / Supervisory Systems
| System ElementFunction | |
|---|---|
| 6AG1405-0KA02-7AA0 | Supplies power to the S7-400 automation station |
| S7-400 Rack | Provides module mounting and internal connections |
| S7-400 CPU | Executes the PLC control program |
| S7-400 I/O Modules | Interface with field sensors and actuators |
| Communication Modules | Exchange data with external automation systems |
| Field Devices | Provide process signals and receive control outputs |
| HMI | Displays process and equipment information |
| SCADA System | Provides supervisory monitoring and data collection |
Industrial Applications
| ApplicationTypical Use | |
|---|---|
| Process Automation | Powering S7-400 PLC stations used for continuous process control |
| Manufacturing Automation | Supplying centralized PLC hardware on production lines |
| Water Treatment | Supporting controller hardware for pumps, valves, and treatment equipment |
| Plant Utility Systems | Powering S7-400 control stations for utility equipment |
| Energy and Infrastructure | Supporting PLC hardware used for monitoring and control |
| Machine Automation | Supplying centralized S7-400 controller assemblies |
| Control Cabinet Refurbishment | Replacing aging or failed S7-400 power supply modules |
| Legacy PLC Maintenance | Maintaining installed S7-400 automation systems |
Installation and Maintenance
- Confirm the complete 6AG1405-0KA02-7AA0 order number before installation.
- Verify the power supply module against the existing S7-400 configuration.
- Isolate the electrical supply before removing an installed power module.
- Check the incoming power wiring and terminal connections.
- Inspect the rack and power interface for signs of overheating or mechanical damage.
- Confirm that the module is installed in the appropriate rack position.
- Check the module seating and associated electrical connections.
- Restore power according to the approved maintenance procedure.
- Check the power supply status after startup.
- Verify that the S7-400 CPU and connected modules start normally.
- Review diagnostic indications if the PLC station does not initialize correctly.
- Confirm normal PLC, I/O, and communication operation before returning the system to service.
If a replacement power supply does not restore the S7-400 station, the incoming supply, rack connections, CPU, and other system modules should also be checked rather than assuming the power module is the only fault source.
Related Components
| ComponentFunction | |
|---|---|
| 6AG1405-0KA02-7AA0 | Supplies power to the S7-400 system |
| S7-400 Rack | Provides module mounting and backplane interconnection |
| S7-400 CPU | Executes PLC control logic |
| S7-400 I/O Modules | Interface with field signals |
| S7-400 Communication Modules | Provide communication with external systems |
| S7-400 Interface Modules | Support system-level module connections where applicable |
| HMI | Provides operator monitoring and control |
| SCADA System | Provides supervisory monitoring and data collection |
Recommended Related Models
| Model / Product FamilyProduct TypeTypical Application | ||
|---|---|---|
| Siemens 6AG1400 SIPLUS S7-400 Rack Series | SIPLUS S7-400 Rack | Mounting and interconnecting S7-400 modules |
| Siemens SIPLUS S7-400 CPU Series | CPU Module | PLC control and logic execution |
| Siemens SIPLUS S7-400 I/O Series | I/O Module | Digital and analog field interfaces |
| Siemens SIPLUS S7-400 Communication Series | Communication Module | PLC networking and data exchange |
| Siemens SIPLUS S7-400 Interface Series | Interface Module | Connections between S7-400 system sections |
| Siemens SIPLUS S7-400 Power Supply Series | Power Supply Module | Supplying power to S7-400 automation stations |
Key Advantages
- SIPLUS S7-400 power supply module configuration.
- Provides system power for compatible S7-400 hardware.
- Suitable for centralized PLC control cabinets.
- Integrates with the S7-400 rack and backplane architecture.
- Applicable to process-control and manufacturing systems.
- Suitable for S7-400 maintenance and replacement work.
- Useful for maintaining existing S7-400 control installations.
Technical FAQs
What is the function of the Siemens 6AG1405-0KA02-7AA0?
The 6AG1405-0KA02-7AA0 is a SIPLUS S7-400 Power Supply Module used to supply the operating power required by the compatible S7-400 automation station.
What should be checked if an S7-400 system does not start after installing the power supply?
The incoming electrical supply, module connections, rack interface, power supply status, CPU status, and installed module configuration should be checked in sequence. A complete loss of PLC operation can involve the power path or another rack component.
Where is the 6AG1405-0KA02-7AA0 installed in an S7-400 system?
The module is installed as part of the S7-400 rack configuration and supplies the system through the rack’s internal power distribution and backplane arrangement.
Is the 6AG1405-0KA02-7AA0 suitable for replacing an existing S7-400 power supply?
It can be considered for S7-400 replacement work when the complete order number and system configuration match the existing installation. The rack type, power arrangement, and connected modules should be verified before replacement.