Product Overview

The Siemens 6AG1307-1EA01-7AA0 SIPLUS S7-300 PS 307 Power Supply is an industrial power supply module designed to provide a regulated 24 V DC output for Siemens SIMATIC S7-300 automation systems and related control equipment. It belongs to the SIPLUS product range, which is designed to support operation under extended environmental conditions.

This power supply is based on the standard Siemens 6ES7307-1EA01-0AA0 platform and incorporates conformal coating on its electronic assemblies. The coating provides additional protection against environmental influences and helps the unit operate in applications where temperature and atmospheric conditions are more demanding than those of a standard industrial control cabinet.

The 6AG1307-1EA01-7AA0 accepts single-phase 120 V or 230 V AC input and provides a stabilized 24 V DC output with a rated current of 5 A. This makes it suitable for supplying power to PLC-related circuits, control devices, sensors, and other compatible 24 V DC loads.

Within an automation installation, a stable DC supply is essential for maintaining reliable operation of the controller and connected control equipment. Voltage instability or insufficient current capacity can lead to unexpected equipment resets, communication interruptions, or control-system faults. The PS 307 provides a dedicated power source for appropriately rated automation loads.

The SIPLUS design is particularly relevant to installations exposed to a wider temperature range. Its specified operating temperature range extends from -25°C to +70°C, making it suitable for selected industrial environments where standard equipment may require additional environmental protection.

Technical Specifications

Note: Confirm the exact product revision and installation documentation before commissioning. The dimensions above are the supplied listing values, expressed in a different order from some manufacturer dimensional references.

Function and Working Principle

The primary function of the Siemens 6AG1307-1EA01-7AA0 is to convert incoming AC electrical power into a stabilized 24 V DC supply for industrial automation equipment.

1. AC Input Power Conversion

The module accepts single-phase AC input at 120 V or 230 V. Its input arrangement supports the corresponding voltage ranges specified for the product.

The internal power-conversion circuitry processes the incoming AC supply and provides a regulated DC output. This allows the connected automation equipment to receive a suitable operating voltage even when the input supply varies within the permitted range.

The input voltage selection and wiring must follow the manufacturer’s installation instructions. Incorrect connection can damage the power supply and connected equipment.

2. Stabilized 24 V DC Output

The PS 307 provides a nominal 24 V DC output with a rated current of 5 A. This output can supply compatible PLC-related circuits and other control devices within the available current capacity.

A stable DC supply is important for electronic controllers, sensors, interface devices, and signal-processing equipment. Maintaining the required voltage helps reduce the risk of unstable operation caused by inadequate power.

The total connected load must remain within the rated output capacity. Engineers should calculate the combined current consumption of all connected devices and allow an appropriate operating margin.

3. Overload and Short-Circuit Protection

Industrial power supplies may encounter abnormal conditions such as excessive load current or short circuits in downstream wiring. The PS 307 includes protection characteristics intended to help protect the power supply and connected circuits under specified fault conditions.

Protection behavior depends on the fault type and operating conditions. It should not replace correctly rated branch protection, suitable wiring, or proper electrical design.

4. Conformal Coating Protection

A distinguishing feature of the SIPLUS version is its conformal coating. This coating is applied to electronic assemblies to provide additional protection against certain environmental influences.

It is especially relevant in installations where humidity, condensation, or atmospheric contaminants may be a concern. However, conformal coating does not make the power supply waterproof or suitable for unrestricted exposure to liquids and corrosive chemicals.

The installation environment must remain within the manufacturer’s specified limits.

5. Short-Term Mains Failure Buffering

The PS 307 design includes short-term power-failure buffering. This function can help maintain the DC output briefly during a temporary interruption of the AC input.

The documented buffering time is approximately 20 ms at rated load under specified conditions. This feature can help bridge short supply interruptions, but it is not a replacement for a dedicated UPS or battery-backed power system where extended backup operation is required.

Role in Industrial Control Systems

The Siemens 6AG1307-1EA01-7AA0 provides a DC power source for automation equipment. In an S7-300 installation, it is commonly used to supply the control system and compatible external loads.

PLC Power Supply

A programmable logic controller requires a stable power source to operate its CPU and associated electronics. The PS 307 can provide the required DC supply within the supported S7-300 system arrangement.

Stable power helps the PLC maintain its operating state and execute its control program reliably. The exact power distribution arrangement depends on the CPU, rack configuration, and connected modules.

Sensor and Field Device Supply

Many industrial sensors and control devices use 24 V DC. The PS 307 may supply compatible devices when the total current demand is within its available capacity.

Examples include proximity sensors, photoelectric sensors, signal conditioners, and selected interface devices. Field wiring should be designed to account for cable voltage drop and the current consumption of each device.

Control Circuit Distribution

The power supply can form part of a 24 V DC distribution arrangement for control relays, interface circuits, and other automation components.

For larger installations, engineers may use separate power supplies or distribution protection to divide loads into independent branches. This can simplify fault isolation and maintenance.

Integration with Industrial Automation Equipment

The PS 307 is associated with the SIMATIC S7-300 and ET 200M automation environment. Its suitability for a particular installation depends on the system’s power requirements, mounting arrangement, and wiring design.

It should be treated as a power supply component rather than a PLC CPU or signal-processing module.

Industrial Applications

The 6AG1307-1EA01-7AA0 is suitable for industrial control installations requiring a regulated 24 V DC supply and extended environmental operating conditions.

1. Manufacturing Automation

Manufacturing lines use 24 V DC power for PLC circuits, sensors, control relays, and other electronic devices. The PS 307 can provide a centralized supply for compatible loads in an appropriately designed control cabinet.

Stable power helps support continuous operation of machine-control functions and production sequences.

2. Process Control Systems

Process automation installations may include controllers, signal interfaces, measurement devices, and control accessories that require 24 V DC.

The power supply can support these devices when the total connected load remains within its rated output capacity. Separate supplies may be necessary where different process sections require electrical isolation or independent power distribution.

3. Industrial Equipment in Variable Environments

The SIPLUS version is designed for an extended operating temperature range of -25°C to +70°C. This makes it relevant to selected installations where temperature conditions are more demanding than those normally encountered in standard indoor control cabinets.

Actual suitability depends on enclosure design, ventilation, humidity, contamination, and other environmental factors.

4. Machinery Control Cabinets

Machine control cabinets commonly contain PLCs, terminal blocks, relays, sensors, and interface equipment. The PS 307 can provide a 24 V DC source for compatible control circuits.

Its compact design allows it to be incorporated into a suitable S7-300 power arrangement while leaving space for other control components.

5. Transportation and Infrastructure Equipment

Some infrastructure and industrial equipment installations operate in environments with wider temperature variations. The SIPLUS environmental protection characteristics may be useful in selected applications.

The product should not be assumed to have railway or other sector-specific certification unless the exact required certification is confirmed.

Installation and System Integration

Correct installation is essential for electrical safety, reliable output, and long-term operation.

1. Verify the AC Input Supply

Before connecting the module, confirm whether the installation uses the 120 V or 230 V AC input range. The permitted ranges are 85–132 V AC and 170–264 V AC respectively.

Follow the manufacturer’s wiring and voltage-selection instructions. Confirm the supply frequency and protective-device requirements before energizing the unit.

2. Confirm Mounting Arrangement

The supplied dimensions are 125 × 120 × 60 mm. Verify the manufacturer’s dimensional drawing and mounting instructions before designing the cabinet.

The power supply should be installed in a suitable location with adequate access for wiring and maintenance. Avoid obstructing ventilation paths or installing the unit close to equipment that generates excessive heat.

3. Plan the 24 V DC Load

Calculate the combined current requirements of the connected devices. The rated output current is 5 A, so the total load must remain within the permitted operating capacity.

Consider startup current, relay coil loads, sensor consumption, and possible future expansion. Where the total demand approaches the power supply’s rating, evaluate a separate supply or a higher-capacity configuration.

4. Grounding and Wiring

Connect the protective earth and electrical conductors according to the manufacturer’s instructions and applicable electrical regulations.

Use suitable wire sizes and terminal connections. Keep wiring organized and clearly identified to simplify maintenance and troubleshooting.

5. Test the Output Voltage

After installation, verify the output voltage before connecting sensitive equipment. Confirm that the measured DC voltage is within the permitted range and that the supply remains stable under the expected load.

Check for abnormal heating, loose terminals, and unexpected voltage drops during commissioning.

6. Environmental Protection

Although the SIPLUS version includes conformal coating, the complete installation must still protect the power supply from unsuitable environmental conditions.

Use an appropriate cabinet where necessary. Consider condensation, airflow, contamination, and temperature when selecting the mounting location.

Compatible System Components

The Siemens 6AG1307-1EA01-7AA0 can be used with compatible automation equipment that requires a suitable 24 V DC supply.

Compatibility should always be checked against the actual product specifications. The PS 307 does not automatically replace every 24 V DC power supply, even when the output voltage is the same.

Alternative Models and Replacement Considerations

The 6AG1307-1EA01-7AA0 is based on the standard Siemens 6ES7307-1EA01-0AA0 platform. When selecting a replacement, engineers should distinguish between standard and SIPLUS versions.

Before selecting an alternative, compare:

• AC input voltage and phase requirements.
• DC output voltage and rated current.
• Physical dimensions and mounting arrangement.
• Environmental operating temperature.
• Conformal coating and environmental protection.
• Wiring terminals and connection requirements.
• Total connected load and startup current.
• Product lifecycle and availability.

A standard 6ES7 model may share the basic electrical platform but does not necessarily provide the same environmental protection as its SIPLUS counterpart.

Key Advantages

Regulated 24 V DC Output

The 5 A output provides a suitable power source for compatible PLC-related equipment and industrial control circuits.

Flexible AC Input

The power supply supports 120 V and 230 V AC input ranges, making it adaptable to the corresponding single-phase industrial supply arrangements.

Extended Temperature Range

The specified -25°C to +70°C operating range supports applications with more demanding temperature conditions than standard equipment.

Conformal Coating

The SIPLUS coating provides additional protection for electronic assemblies against selected environmental influences.

Short-Term Power-Failure Buffering

The design provides a brief buffer during temporary input interruptions, helping bridge short power disturbances under specified conditions.

S7-300 System Compatibility

The PS 307 design is intended for the SIMATIC S7-300 automation environment and related compatible control arrangements.

Compact Installation

Its compact physical format allows it to be incorporated into appropriately designed industrial control cabinets.

Technical FAQs

1. What is the Siemens 6AG1307-1EA01-7AA0?

It is a SIPLUS S7-300 PS 307 stabilized power supply module. It converts single-phase AC input into a regulated 24 V DC output for compatible industrial automation equipment.

2. What is the output current?

The rated output current is 5 A at 24 V DC.

3. What input voltage does this power supply support?

It supports 120 V and 230 V AC input ranges. The documented permitted ranges are 85–132 V AC and 170–264 V AC.

4. What is the difference between 6AG1307-1EA01-7AA0 and 6ES7307-1EA01-0AA0?

The 6AG1307-1EA01-7AA0 is the SIPLUS version based on the standard 6ES7307-1EA01-0AA0 platform. The SIPLUS version includes conformal coating and an extended operating temperature range.

5. Can it power an S7-300 PLC?

It is designed for the SIMATIC S7-300 power supply environment. Confirm the CPU and system configuration requirements before installation.

6. Is the power supply suitable for high-temperature environments?

Its specified operating temperature range is -25°C to +70°C. The actual installation must still meet the manufacturer’s environmental and thermal requirements.

7. Does it provide backup power during an outage?

It provides short-term mains buffering under specified conditions, approximately 20 ms at rated load. It is not a substitute for a UPS or battery system intended to provide extended backup power.

8. Is the module a PLC CPU?

No. It is a power supply module. It provides electrical power to compatible automation equipment but does not execute PLC control programs.

9. What should be checked before purchasing?

Verify the complete part number, physical condition, input voltage requirements, output rating, terminal condition, environmental configuration, and available warranty or test information.

10. Can a standard PS 307 replace this SIPLUS version?

Not automatically. Although the standard model shares the basic platform, its environmental protection and operating temperature range may differ. Replacement suitability depends on the installation conditions.

Procurement and Maintenance Recommendations

When sourcing the Siemens 6AG1307-1EA01-7AA0, verify that the complete order number matches the required SIPLUS version. Do not confuse it with the standard 6ES7307-1EA01-0AA0, particularly when the installation depends on extended environmental protection.

For new, surplus, or refurbished units, inspect the product label, housing, terminals, and visible electronic condition. Confirm whether the unit has been stored under suitable conditions and request functional test information where available.

During maintenance, inspect the AC input connections, DC output terminals, grounding, and connected load distribution. Monitor output voltage and check for abnormal heating or signs of loose connections.

If a power supply repeatedly shuts down or the DC output becomes unstable, investigate the connected load, wiring, ventilation, and input supply before replacing the module. A downstream short circuit or excessive load can cause symptoms that resemble an internal power supply failure.

For replacement projects, compare input and output ratings, mounting dimensions, terminal assignments, and environmental specifications. The standard and SIPLUS versions should not be treated as interchangeable without an engineering review.

Conclusion

The Siemens 6AG1307-1EA01-7AA0 SIPLUS S7-300 PS 307 is a stabilized industrial power supply designed to convert 120/230 V AC input into a 24 V DC, 5 A output. Based on the standard 6ES7307-1EA01-0AA0 platform, it adds conformal coating and an extended operating temperature range of -25°C to +70°C.

Its role in industrial automation is to provide a dependable DC power source for compatible PLC equipment, sensors, interface circuits, and control devices. When selecting or replacing this module, engineers should verify the exact part number, load requirements, mounting arrangement, and environmental conditions to maintain reliable operation of the automation system.