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- Siemens
- 6AG1337-3BA00-7AA0
- Power Supply Module
- Germany
- 240 × 125 × 125 mm
- 3.419 kg
- Xiamen, China
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Product Overview
The Siemens 6AG1337-3BA00-7AA0 SIPLUS PS Power Supply Module is an industrial power supply module for Siemens automation systems based on the S7-300 platform. It belongs to the SIPLUS extreme product family and is intended for applications where the control system has to operate under environmental conditions beyond those normally associated with standard automation cabinets.
In a typical S7-300 installation, the power supply module sits alongside the CPU and I/O modules on the rack. Its job is to convert the available incoming supply into the DC operating voltage required by the automation station and to feed the internal system electronics.
The 6AG1337-3BA00-7AA0 becomes particularly relevant in applications such as outdoor equipment, industrial machinery rooms, transportation-related installations, or production areas where temperature, humidity, condensation, or other environmental factors can make ordinary control-system hardware unsuitable.
From a maintenance perspective, this module is more than a simple replacement power unit. Before installing a replacement, engineers should verify the incoming supply, output requirements, rack configuration, load condition, wiring, and the actual SIPLUS variant. A power-supply fault can originate from the module itself, an overloaded DC circuit, field wiring, or another component connected to the supply.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1337-3BA00-7AA0 |
| Product Family | SIPLUS |
| Product Series | S7-300 |
| Product Type | SIPLUS PS Power Supply Module |
| System Role | PLC System Power Supply |
| Application | Industrial Automation |
| Platform | Siemens SIMATIC S7-300 |
| Installation | S7-300 Rack / Control Cabinet |
| Dimensions | 240 × 125 × 125 mm |
| Weight | 3.419 kg |
Product Features
The 6AG1337-3BA00-7AA0 is intended for power distribution within an S7-300 automation station, with the SIPLUS version targeting demanding industrial environments.
Key characteristics include:
- Siemens SIPLUS PS Power Supply Module
- Model 6AG1337-3BA00-7AA0
- Based on the SIMATIC S7-300 platform
- Used as the power-supply stage of an automation rack
- Supports the internal power requirements of the PLC station
- SIPLUS variant for demanding environmental applications
- Suitable for industrial control cabinets and automation equipment
- Relevant to S7-300 CPU and I/O system installations
- Suitable for maintenance and replacement projects
- Intended for applications requiring a more environmentally robust automation platform
The power supply should be selected according to the complete S7-300 station configuration. The CPU and I/O load, incoming supply arrangement, cabinet conditions, and required environmental class all need to be considered.
Working Principle
The 6AG1337-3BA00-7AA0 sits at the power-entry side of the S7-300 station.
A simplified relationship is:
Incoming Supply → SIPLUS PS Power Supply Module → S7-300 Backplane / PLC Electronics → CPU and I/O Modules
The module receives the available electrical supply and converts it into the DC power required by the automation station.
In practical operation, the power supply has three main jobs:
-
Accept the available system supply
The incoming electrical source is connected to the power-supply module according to the applicable installation arrangement.
-
Convert and regulate the supply
Internal power-conversion circuitry establishes the required DC operating supply for the S7-300 station.
-
Feed the automation hardware
The resulting supply is distributed to the PLC electronics and associated modules through the rack’s power architecture.
This means that a power-supply problem can have a system-wide effect. A fault may appear as CPU startup failure, unexpected module diagnostics, loss of I/O operation, or intermittent PLC resets rather than as an obvious power-supply fault.
For troubleshooting, engineers should therefore measure the supply at the appropriate points and check the station load before concluding that the PS module itself has failed.
Role in a SIMATIC S7-300 Control Architecture
The power supply occupies the foundation of the PLC station.
A typical arrangement can be represented as:
Incoming Power → 6AG1337-3BA00-7AA0 → S7-300 Rack → CPU → Signal / Function Modules → Field Devices
| System Element | Function |
|---|---|
| 6AG1337-3BA00-7AA0 | Supplies the S7-300 automation station |
| S7-300 Rack | Provides mechanical and electrical module integration |
| S7-300 CPU | Executes PLC control logic |
| Digital Input Modules | Acquire binary field signals |
| Digital Output Modules | Control discrete field devices |
| Analog Input Modules | Acquire process measurements |
| Analog Output Modules | Send analog control signals |
| Communication Modules | Connect the PLC with external networks or devices |
| Field Devices | Provide process signals and receive control commands |
| Control Cabinet | Houses and protects the automation hardware |
The PS module is therefore upstream of the CPU and I/O electronics. A problem at this level can affect several modules simultaneously.
SIPLUS Application Considerations
The SIPLUS version becomes particularly useful when the automation station has to operate in an environment that places greater demands on the hardware than a conventional control cabinet installation.
Typical considerations include:
- Wide or demanding temperature conditions
- Condensation-related environmental exposure
- Higher humidity
- Industrial locations with harsh ambient conditions
- Equipment installed outside conventional climate-controlled rooms
- Transportation and infrastructure applications
- Machinery exposed to changing environmental conditions
The exact environmental limits and installation requirements should be checked against the specific SIPLUS product documentation and the actual application conditions.
For an engineer selecting between standard SIMATIC hardware and SIPLUS hardware, the decision should be based on the site’s environmental conditions rather than simply on the electrical function of the module.
Industrial Applications
| Application | Typical Use |
|---|---|
| Factory Automation | Powering S7-300 control stations |
| Process Machinery | Supplying PLC rack electronics |
| Transportation Equipment | Control systems exposed to demanding environments |
| Outdoor Industrial Equipment | Automation hardware requiring environmental protection |
| Manufacturing Lines | Powering PLC CPU and I/O assemblies |
| Infrastructure Systems | Control cabinets operating under variable ambient conditions |
| Industrial Utilities | Supporting PLC-based monitoring and control |
| Machine Control | Supplying rack-mounted S7-300 automation equipment |
The suitability of the SIPLUS variant depends on the environmental conditions and the complete control-system configuration.
Installation and Maintenance
Power-supply replacement should be treated as a system-level maintenance task because an incorrect supply condition can affect the entire PLC rack.
Before replacement, engineers should:
- Confirm the complete 6AG1337-3BA00-7AA0 order number.
- Verify the S7-300 rack configuration.
- Check the incoming power supply.
- Confirm the required output arrangement.
- Review the PLC station’s power demand.
- Inspect power wiring and terminals.
- Check for loose or overheated connections.
- Isolate the electrical supply before removing the module.
- Observe the applicable electrical safety procedure.
- Check the surrounding cabinet temperature and ventilation.
- Inspect the rack and adjacent modules for signs of heat damage.
- Install the replacement power supply correctly.
- Verify the power connections before energizing the station.
- Check the CPU startup condition.
- Check diagnostics from the CPU and connected modules.
- Confirm that all required I/O modules return to normal operation.
- Monitor the system after restart.
If the replacement power supply trips or the PLC continues to reset, engineers should check the total load and downstream wiring rather than repeatedly replacing the PS module.
Compatible System Components
The 6AG1337-3BA00-7AA0 normally forms part of a broader S7-300 station rather than operating as an isolated device.
| Component | Function |
|---|---|
| SIMATIC S7-300 Rack | Mechanical and electrical platform for the PLC station |
| S7-300 CPU | Executes control program and system functions |
| Digital Input Module | Receives discrete field signals |
| Digital Output Module | Controls discrete field devices |
| Analog Input Module | Acquires analog process values |
| Analog Output Module | Generates analog control signals |
| Communication Processor | Provides external communication functions |
| Signal Module | Interfaces the PLC with field instrumentation |
| 24 V DC Control Circuit | Supplies compatible control loads |
| Control Cabinet | Provides environmental and electrical installation protection |
Compatibility should be evaluated at the complete station level, including power requirements and the specific S7-300 configuration.
Recommended Related Models
For this power-supply product, related recommendations are best organized around S7-300 power architecture and SIPLUS-compatible automation hardware, rather than simply listing unrelated Siemens modules.
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Siemens 6AG1337-3BA00-7AA0 | SIPLUS PS Power Supply Module | S7-300 PLC system power supply |
| Siemens 6AG1315-2EH14-2AB0 | SIPLUS S7-300 CPU | S7-300 control applications |
| Siemens 6AG3317-2AK14-2AB0 | SIPLUS S7-300 CPU | Higher-performance S7-300 control |
| Siemens 6AG1321-1BL00-2AA0 | SIPLUS S7-300 Digital Input Module | Discrete signal acquisition |
| Siemens 6AG1322-1BL00-2AA0 | SIPLUS S7-300 Digital Output Module | Discrete output control |
| Siemens 6AG1331-7KF02-2AB0 | SIPLUS S7-300 Analog Input Module | Analog process measurement |
| Siemens 6AG1332-5HF00-2AB0 | SIPLUS S7-300 Analog Output Module | Analog control signals |
| Siemens 6AG1350-1AH03-4AB0 | SIPLUS S7-300 Function Module | Specialized automation functions |
Key Advantages
- Siemens SIPLUS PS Power Supply Module.
- Model 6AG1337-3BA00-7AA0.
- Intended for SIMATIC S7-300 automation systems.
- Supplies the PLC rack’s internal power requirements.
- SIPLUS variant for demanding environmental applications.
- Suitable for industrial control cabinets and machinery.
- Relevant to S7-300 maintenance and replacement projects.
- Supports PLC stations where environmental conditions require SIPLUS hardware.
Technical FAQs
What is the function of 6AG1337-3BA00-7AA0 in an S7-300 system?
It serves as the power-supply stage for the S7-300 automation station, supplying the electrical power required by the PLC rack and its associated electronics.
Why choose a SIPLUS PS module instead of a standard S7-300 power supply?
The SIPLUS version is intended for applications where environmental conditions are more demanding than a conventional automation installation. Selection should therefore consider temperature, humidity, condensation, installation location, and the environmental requirements of the complete control cabinet.
Can a power-supply fault cause multiple S7-300 modules to stop working at the same time?
Yes. Because the PS module is upstream of the CPU and I/O electronics, a supply problem can affect several modules simultaneously. Symptoms may include CPU startup problems, module diagnostics, resets, or loss of I/O operation.
What should be checked before replacing 6AG1337-3BA00-7AA0?
The incoming supply, station load, wiring, rack configuration, and downstream circuits should be checked first. If these conditions are normal, the PS module itself becomes a stronger candidate for replacement.