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- 6AG1407-0KR02-7AA0
- Power Supply Module
- Germany
- 50 × 290 × 217 mm
- 1.341 kg
- Xiamen, China
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Product Overview
The Siemens 6AG1407-0KR02-7AA0 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 with the S7-400 rack, CPU, I/O modules, and communication modules.
In an industrial control cabinet, the power supply forms the electrical foundation of the S7-400 station. It is used in centralized PLC architectures where continuous operation of the controller and connected signal-processing hardware is required for process monitoring and machine control.
The SIPLUS version is intended for demanding industrial applications where environmental conditions need to be considered when selecting automation hardware. It can be used for replacement and maintenance of compatible S7-400 installations.
During troubleshooting, technicians should evaluate the power supply together with the incoming electrical supply, rack connections, backplane, and connected modules. This approach helps distinguish a power-system problem from an individual CPU, I/O, or communication-module fault.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1407-0KR02-7AA0 |
| 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 process control |
| Installation | S7-400 rack |
| Dimensions | 50 × 290 × 217 mm |
| Weight | 1.341 kg |
Product Features
- SIPLUS power supply module for compatible Siemens S7-400 systems.
- Supplies operating power for the S7-400 automation rack.
- Integrates with S7-400 CPUs, signal modules, and communication modules.
- Suitable for industrial automation and process control applications.
- Supports maintenance and replacement of existing S7-400 installations.
- Forms part of the central electrical infrastructure of the PLC station.
- Suitable for demanding industrial installation environments.
Working Principle
The 6AG1407-0KR02-7AA0 receives electrical input from the control cabinet supply and converts it into the operating power required by the S7-400 automation station.
Power Source → 6AG1407-0KR02-7AA0 → S7-400 Rack → CPU / I/O / Communication Modules → Control Process
The module is responsible for supplying the rack rather than executing PLC logic or processing field signals. The CPU handles program execution, while the I/O and communication modules perform their respective interface functions.
If the power supply operates correctly, the rack-mounted automation hardware can maintain its normal operating state. A failure in the power layer can affect multiple modules simultaneously, so power diagnostics are an important part of S7-400 troubleshooting.
Role in a Siemens S7-400 Control Architecture
The power supply occupies the electrical supply layer of the S7-400 control architecture and supports the operation of the rack-mounted automation components.
Incoming Supply → SIPLUS Power Supply → S7-400 Rack → CPU → I/O / Communication → Field Equipment
| System Element | Function |
|---|---|
| Incoming Power | Provides electrical input to the control cabinet |
| 6AG1407-0KR02-7AA0 | 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 |
| I/O Modules | Interface with field sensors and actuators |
| Communication Modules | Exchange data with external automation systems |
| Engineering Station | Supports configuration and diagnostics |
| Field Equipment | Provides process signals and receives control commands |
The power supply therefore supports the operating foundation required by the complete S7-400 automation station.
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Automation | Centralized S7-400 control stations |
| Manufacturing | PLC-based production control |
| Chemical Processing | Process monitoring and control |
| Water and Wastewater | Centralized automation systems |
| Power and Utilities | Industrial control and monitoring |
| Industrial Machinery | PLC control infrastructure |
| Infrastructure Automation | Centralized control cabinets |
| Continuous-Process Plants | Automation and process supervision |
Installation and Maintenance
- Verify the complete Siemens order number before replacement.
- Confirm compatibility with the existing S7-400 system configuration.
- Isolate the applicable electrical supply before servicing.
- Follow the control cabinet’s electrical safety procedures.
- Inspect the rack interface and backplane before installing the replacement.
- Check the associated supply wiring for loose or damaged connections.
- Install the power supply in the designated rack position.
- Ensure that the module is properly seated and secured.
- Restore power according to the approved commissioning procedure.
- Check the module status indicators after startup.
- Review CPU and system diagnostics for power-related faults.
- Confirm normal operation of the connected S7-400 modules.
If a power-related problem remains after replacement, inspect the incoming supply, rack connections, backplane, and connected modules before replacing additional hardware.
Related Components
| Component | Function |
|---|---|
| Siemens S7-400 CPU | Executes PLC control logic |
| S7-400 Rack | Provides module 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 program execution |
| Siemens SIPLUS S7-400 Digital I/O Modules | I/O Module | Discrete 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 the electrical operation of the S7-400 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 conditions.
Technical FAQs
What should be checked when the S7-400 rack fails to start after power-up?
Start with the incoming electrical supply and the power supply status, then check the rack connection and connected-module diagnostics. This helps determine whether the problem originates in the power path or elsewhere in the automation station.
Can a power supply issue affect communication modules even when the CPU appears normal?
Yes. Communication hardware depends on the rack’s electrical supply, so an abnormal power condition can cause communication interruptions or module diagnostic events even when the CPU does not immediately show an obvious program-related fault.
Why is the rack backplane relevant when diagnosing a replacement power supply?
The backplane provides the electrical and system interconnection between the power supply and other rack modules. Poor contact or damage in this area can produce symptoms similar to a defective power supply.
What is the benefit of checking the complete S7-400 station after replacing the power module?
A power supply replacement can restore electrical operation without resolving an underlying problem elsewhere in the rack. Checking the CPU, I/O, communication modules, and diagnostics after startup confirms that the complete control station has returned to normal service.