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6AG1226-6RA32-5XB0 — Product Description, Technical Parameters, Applications, Advantages, and Related Models

1. Product Overview

The 6AG1226-6RA32-5XB0 is a SIPLUS S7-1200 SM 1226 F-DQ fail-safe relay output module designed for safety-related switching applications in industrial automation systems.

The module provides two relay output channels, with two switching circuits per output. It is intended for use with compatible fail-safe controllers and PROFIsafe communication within a properly engineered safety system.

Relay outputs allow suitable AC or DC circuits to be switched through mechanical contacts. This makes the module relevant to applications that require relay-based switching rather than ordinary electronic transistor outputs.

The SIPLUS version includes conformal coating and is specified for an operating temperature range of -25°C to +55°C. It is based on the standard hardware model 6ES7226-6RA32-0XB0.

The module supports safety applications up to Performance Level e under ISO 13849-1 and SIL 3 under IEC 61508, subject to the design, configuration, and validation of the complete safety system.

2. Product Identification

Parameter	Specification
Model	6AG1226-6RA32-5XB0
Brand	Siemens
Product family	SIPLUS S7-1200
Module series	SM 1226 F-DQ
Product designation	SM 1226, F-DQ 2 × relay / 5 A
Product category	Fail-safe relay output module
Standard hardware basis	6ES7226-6RA32-0XB0
Number of digital outputs	2
Number of relay outputs	2
Switching circuits	2 circuits per output
Maximum rated current	5 A per circuit
Maximum combined current	10 A across all circuits, subject to the specified circuit and load conditions
Rated output voltage, DC	5–30 V DC
Rated output voltage, AC	5–250 V AC
Supply voltage range	20.4–28.8 V DC
Safety communication	PROFIsafe
Maximum safety performance	Up to PL e / SIL 3, subject to system requirements
Operating temperature	-25°C to +55°C
Conformal coating	Yes
Protection rating	IP20
Width	70 mm
Height	100 mm
Depth	75 mm
Dimensions (W × H × D)	70 × 100 × 75 mm
Weight (kg)	Approximately 0.300 kg
Typical power dissipation	Approximately 10 W
Maximum backplane bus current	Approximately 120 mA at 5 V DC
Short-circuit protection	Not provided by the relay contacts themselves
Maximum cable length	Up to 200 m for shielded or unshielded cable, subject to installation requirements
Typical applications	Safety-related relay switching and industrial machine control

3. Detailed Technical Parameters

3.1 Electrical Specifications

Parameter	Specification
Model	6AG1226-6RA32-5XB0
Module type	Fail-safe relay output module
Supply voltage	24 V DC nominal system supply
Permissible supply voltage, minimum	20.4 V DC
Permissible supply voltage, maximum	28.8 V DC
Number of digital output channels	2
Number of relay outputs	2
Switching circuits per output	2
Maximum current per circuit	5 A
Maximum combined current	10 A across all circuits, subject to the applicable loading conditions
Permissible DC switching voltage	5–30 V DC
Permissible AC switching voltage	5–250 V AC
Output technology	Mechanical relay contacts
Short-circuit protection	No integrated short-circuit protection through the relay contacts
Typical power dissipation	10 W
Maximum backplane bus current	120 mA at 5 V DC
Safety communication	PROFIsafe
Output status indication	Supported
Output diagnostic indication	Supported, according to the configured system and available diagnostics
Cable length	Up to 200 m, subject to installation and wiring requirements

Important electrical consideration: The maximum contact current must not be interpreted as a universal rating for every type of load.

The permitted switching current depends on the load category, voltage, switching frequency, and whether the load is resistive or inductive. Motor loads, solenoids, contactor coils, and other inductive devices may require additional protective measures.

The relay contact ratings must be checked against the exact application before connecting external equipment.

3.2 Relay Output Characteristics

Parameter	Specification
Model	6AG1226-6RA32-5XB0
Output type	Fail-safe relay output
Relay output count	2
Circuits per output	2
Maximum current per circuit	5 A
Maximum total current	10 A across all circuits, subject to the permitted circuit arrangement
DC contact voltage	5–30 V DC
AC contact voltage	5–250 V AC
Maximum switching frequency, resistive load	Up to 2 Hz
Maximum switching frequency, inductive DC load	Up to 0.1 Hz under the specified DC-13 conditions
Maximum switching frequency, inductive AC load	Up to 2 Hz under the specified AC-15 conditions
Relay-contact short-circuit protection	Not integrated
Typical use	Switching compatible external control circuits
Safety role	Part of a configured and validated safety system

The mechanical relay design is useful when the application requires galvanically separated switching contacts or needs to switch a compatible AC or DC circuit.

However, relay outputs have mechanical contacts and therefore differ from semiconductor-based outputs in switching speed, contact wear, and load behavior.

For applications with frequent switching, long-term high-duty operation, or significant inductive loads, the switching frequency and electrical load category should be carefully evaluated.

3.3 Safety Specifications

Parameter	Specification
Model	6AG1226-6RA32-5XB0
Safety function	Fail-safe digital output switching
Safety communication	PROFIsafe
Maximum Performance Level	PL e, subject to system design
Maximum Safety Integrity Level	SIL 3, subject to system design
Machine safety standard	ISO 13849-1
Functional safety standard	IEC 61508
Required controller	Compatible fail-safe controller
Required engineering	Correct safety configuration and validated safety program
Fault response	Determined by the configured safety function and system architecture
Application restrictions	Must follow the module’s technical and safety requirements

The module’s safety capability is relevant to machine designs that require controlled switching in response to a safety condition.

The final safety performance depends on the complete system, including the controller, safety program, wiring, external devices, diagnostics, and validation process.

A component’s stated maximum safety capability does not automatically make the complete machine compliant with a particular safety level.

3.4 Mechanical Specifications

Parameter	Specification
Model	6AG1226-6RA32-5XB0
Width	70 mm
Height	100 mm
Depth	75 mm
Dimensions (W × H × D)	70 × 100 × 75 mm
Weight (kg)	Approximately 0.300 kg
Front enclosure material	Plastic
Mounting arrangement	Compatible S7-1200 installation
Installation environment	Industrial control cabinet
Protection rating	IP20
Cabinet clearance	Must follow installation requirements
Wiring access	Must be maintained for installation and servicing
Shipping weight	Depends on packaging and accessories

The module’s compact dimensions can simplify cabinet layout when several automation components need to be installed together.

When designing a cabinet, engineers should also account for wiring ducts, cable bending space, heat dissipation, maintenance access, and separation from other equipment where required.

The approximate product weight is 0.300 kg. Packaging and accessories may increase the total shipping weight.

3.5 Environmental Specifications

Parameter	Specification
Model	6AG1226-6RA32-5XB0
Product family	SIPLUS S7-1200
Operating temperature	-25°C to +55°C
Storage and transport temperature	-40°C to +70°C
Conformal coating	Yes
Protection rating	IP20
Maximum installation altitude	2,000 m under the specified operating conditions
Relative humidity	Up to 100% under specified test conditions, including condensation or frost
Commissioning under condensation	Not permitted under the stated condensation conditions
Environmental suitability	Intended for specified demanding industrial environments
Additional enclosure	Required as appropriate to the installation environment

The conformal coating is intended to improve the environmental robustness of the electronic assembly.

It does not make the module waterproof or eliminate the need for a suitable control cabinet.

The module must be installed and operated within its specified temperature, humidity, altitude, and other environmental limits.

4. Product Introduction

The 6AG1226-6RA32-5XB0 is a fail-safe relay output module designed to switch external circuits as part of a compatible industrial safety-control system.

In automated machinery, safety-related control functions may need to remove an enabling signal, switch an external control circuit, or initiate a defined response when a hazardous condition is detected.

The module provides relay contacts that can be used for appropriate switching functions when the connected circuit falls within the module’s electrical limits.

Its role is different from that of a safety input module. A safety input module collects signals from field devices, while a safety output module provides switching commands based on the configured safety logic.

4.1 Relay-Based Switching

Relay contacts provide a physical switching mechanism that can be suitable for certain AC and DC circuits.

This design may be useful when the application requires contact-based switching rather than a semiconductor output.

The permitted voltage and current depend on the specified contact ratings and the load category.

4.2 Fail-Safe Control Integration

The module is intended for use with a compatible fail-safe controller and PROFIsafe communication.

The controller processes the relevant safety signals and executes the safety program. The output module then provides the required switching behavior through its relay outputs.

The resulting system must be configured, commissioned, and validated according to the requirements of the machine and its safety functions.

4.3 Environmental Design

The SIPLUS version includes conformal coating and supports an operating temperature range of -25°C to +55°C.

These characteristics make it relevant to installations where environmental conditions require special consideration.

The precise suitability of the module depends on the actual conditions at the installation site.

4.4 Modular Automation Integration

The module can form part of a larger control system that includes a PLC CPU, safety input modules, ordinary signal modules, communication equipment, power supplies, and external switching devices.

This modular approach allows the system to be organized according to the machine’s signal requirements and safety architecture.

Compatibility must be established before combining components.

5. Main Applications

5.1 Safety-Related Machine Control

Industrial machinery may require a defined safety response when a protective device is activated or an unsafe condition is detected.

The module can provide a relay switching interface for suitable safety-related control circuits.

The exact action depends on the safety program and the design of the external circuit.

5.2 Emergency-Stop Systems

Emergency-stop systems are designed to initiate a predetermined safety response when an operator identifies an immediate hazard.

A fail-safe controller may process the emergency-stop signals and command the appropriate output response through a compatible safety output module.

The module must be part of a properly designed and validated safety circuit.

5.3 Protective Guard Monitoring

Machines often use interlocked doors, access covers, and protective guards to reduce exposure to hazardous motion.

A safety controller can use the status of suitable safety switches to determine whether the machine is permitted to operate.

The relay output module may be used to switch compatible external control circuits when the safety logic requires a response.

5.4 Conveyor and Material-Handling Systems

Conveyor systems may require safety-related switching to stop or inhibit equipment when a protective condition is not satisfied.

The module may be used to switch suitable external control circuits in a compatible safety architecture.

Load current, contact voltage, switching frequency, and the required safety function must be considered during selection.

5.5 Packaging Machinery

Packaging machinery may contain moving cutters, sealing equipment, feeding mechanisms, and other hazardous assemblies.

Safety-related switching can be used to remove an enabling signal or initiate a defined control response when a safety condition occurs.

The module can support this type of application where the electrical and safety requirements are satisfied.

5.6 Automated Production Cells

Automated work cells may contain multiple machines, access doors, transfer systems, and other equipment requiring coordinated safety control.

The module can provide relay-based switching for compatible external circuits within the approved safety architecture.

The system designer must confirm that the number of outputs, contact ratings, and switching characteristics meet the application’s requirements.

5.7 Industrial Control Cabinets in Demanding Environments

The SIPLUS version may be considered for installations where temperature and environmental conditions are important selection criteria.

The operating temperature range of -25°C to +55°C should be compared with the actual installation conditions.

A suitable enclosure, correct wiring, and proper maintenance remain essential.

6. Product Advantages

6.1 Relay-Based Output Switching

The module uses relay contacts rather than relying solely on semiconductor switching.

This can be useful when the application requires compatible AC or DC contact switching.

The actual suitability depends on contact ratings, switching frequency, and the characteristics of the connected load.

6.2 Two Relay Output Channels

The module provides two relay outputs, with two switching circuits per output.

This arrangement can support several switching requirements in a compact module, subject to the permitted circuit configuration.

The available channels should be matched to the safety function and wiring design.

6.3 Support for PROFIsafe

PROFIsafe enables safety-related communication within a compatible automation architecture.

This allows the module to be integrated into a properly configured fail-safe control system.

Correct controller selection, addressing, parameterization, and validation remain necessary.

6.4 Support for High Safety Performance

The module supports safety applications up to PL e and SIL 3 under the applicable system conditions.

This makes it relevant to machine designs with demanding functional safety requirements.

The achieved safety level depends on the complete system rather than the module alone.

6.5 Enhanced Environmental Characteristics

The SIPLUS version includes conformal coating and supports an operating temperature range of -25°C to +55°C.

These characteristics can be beneficial in industrial installations with demanding environmental conditions.

The exact environmental suitability must still be checked against the installation requirements.

6.6 Flexible AC and DC Switching

The specified contact voltage ranges cover compatible AC and DC applications.

This can provide flexibility when switching external control circuits.

The contact rating must be evaluated against the actual load, especially for inductive equipment.

6.7 Compact Installation

The nominal dimensions of 70 × 100 × 75 mm support integration into compatible control cabinets.

A compact module can help organize equipment and reduce the space required for individual control functions.

Cabinet design must still allow adequate wiring, thermal management, and maintenance access.

6.8 Clear Maintenance Identification

The complete article number identifies the specific product variant.

Recording this number in maintenance documents helps distinguish the SIPLUS module from standard-series modules and other related products.

For safety-related equipment, replacement must include the required configuration checks and validation.

7. Five Related Models in the Same or a Related Product Family

The following models cover related fail-safe input and output functions within the S7-1200 automation family.

They are candidates for comparison rather than automatic substitutes. Exact compatibility depends on the application, electrical ratings, environmental conditions, and safety configuration.

Model	Product category	Main function	Key parameters	Dimensions (W × H × D)	Weight (kg)
6AG1226-6BA32-5XB0	SIPLUS SM 1226 F-DI	Fail-safe digital input acquisition	16 × 24 V DC inputs; PROFIsafe; up to PL e / SIL 3 under applicable conditions	70 × 100 × 75 mm; confirm exact variant	Approx. 0.250 kg; confirm exact weight
6AG1226-6DA32-5XB0	SIPLUS SM 1226 F-DQ	Fail-safe electronic digital output switching	4 × 24 V DC fail-safe outputs; verify rated current and load requirements	Confirm exact dimensions	Confirm exact weight
6ES7226-6RA32-0XB0	Standard SM 1226 F-DQ relay	Fail-safe relay output switching	2 relay outputs; 2 circuits per output; 5 A per circuit; PROFIsafe	70 × 100 × 75 mm	Approx. 0.300 kg
6ES7226-6BA32-0XB0	Standard SM 1226 F-DI	Fail-safe digital input acquisition	16 × 24 V DC inputs; PROFIsafe; safety performance depends on system design	70 × 100 × 75 mm; confirm exact version	Confirm exact weight
6ES7226-6DA32-0XB0	Standard SM 1226 F-DQ	Fail-safe electronic digital output switching	4 fail-safe digital outputs; verify current rating and output characteristics	Confirm exact dimensions	Confirm exact weight

7.1 Fail-Safe Digital Input Module

The 6AG1226-6BA32-5XB0 is relevant when the application requires safety-related signal acquisition rather than output switching.

It can be considered for compatible safety switches, emergency-stop circuits, and other appropriate field devices.

Input and output modules serve different functions and are normally selected according to the signals required by the safety architecture.

7.2 Fail-Safe Electronic Output Module

The 6AG1226-6DA32-5XB0 is relevant when the application requires fail-safe electronic digital outputs rather than relay contacts.

Electronic outputs and relay outputs have different switching characteristics, current limitations, and load compatibility requirements.

The correct choice depends on the connected equipment and the required safety function.

7.3 Standard Relay Output Module

The 6ES7226-6RA32-0XB0 is the standard-series reference for the target module.

It is useful when comparing the SIPLUS variant with a standard version intended for less demanding environmental conditions.

The two versions should not be assumed to have identical environmental capabilities.

7.4 Standard Fail-Safe Input Module

The 6ES7226-6BA32-0XB0 is relevant when the control system requires fail-safe digital input acquisition.

It may be used with compatible safety output modules in an appropriately engineered system.

Environmental requirements should be checked independently before choosing the standard version.

7.5 Standard Fail-Safe Electronic Output Module

The 6ES7226-6DA32-0XB0 is relevant when fail-safe electronic output switching is required.

Its electronic output characteristics differ from those of a relay module, so the permitted load, output current, and switching requirements must be checked before selection.

8. Five Additional Models from the Same Brand’s Automation Portfolio

The following models represent common automation functions, including PLC control, digital input acquisition, digital output switching, and analog signal measurement.

They are not direct replacements for the target relay output module.

Model	Product category	Main function	Key parameters	Dimensions (W × H × D)	Weight (kg)
6ES7214-1AG40-0XB0	S7-1200 PLC CPU	Main control and logic processing	Integrated I/O and communication features depend on the exact CPU variant	Confirm exact dimensions	Confirm exact weight
6ES7215-1AG40-0XB0	S7-1200 PLC CPU	PLC control for compatible automation systems	CPU performance, memory, onboard I/O, and communication depend on the exact variant	Confirm exact dimensions	Confirm exact weight
6ES7221-1BH32-0XB0	SM 1221 digital input module	Standard digital input acquisition	Verify input count, voltage, and wiring arrangement	Confirm exact dimensions	Confirm exact weight
6ES7222-1BH32-0XB0	SM 1222 digital output module	Standard digital output switching	Verify output type, channel count, voltage, and current	Confirm exact dimensions	Confirm exact weight
6ES7231-4HF32-0XB0	SM 1231 analog input module	Analog signal measurement	Verify channel count, supported signal ranges, and resolution	Confirm exact dimensions	Confirm exact weight

8.1 PLC CPU Models

A PLC CPU executes the user program and coordinates the operation of the automation system.

It processes input information, executes control logic, manages output commands, and communicates with compatible devices.

The correct CPU depends on processing requirements, memory, communication interfaces, integrated I/O, and expansion needs.

A standard CPU should not be assumed to provide the safety capabilities required for safety-related control.

8.2 Standard Digital Input Modules

Standard digital input modules receive discrete signals from devices such as push buttons, limit switches, and general-purpose sensors.

They are suitable for ordinary machine-status monitoring where the safety function is implemented through an appropriate safety architecture.

They should not be used as substitutes for fail-safe input modules when a safety-rated input function is required.

8.3 Standard Digital Output Modules

Standard digital output modules switch compatible external loads as part of ordinary machine control.

Their suitability depends on the output type, voltage, current, switching frequency, and load characteristics.

A standard output module should not be substituted for a fail-safe output module where a safety-related output function is required.

8.4 Analog Input Modules

Analog input modules measure varying electrical signals from compatible sensors and transmitters.

They may be used to monitor process values such as pressure, temperature, flow, and liquid level.

Their supported ranges, resolution, accuracy, and channel count depend on the exact module.

They perform a different function from the relay output module described here.

9. Comparison of Relay Outputs and Electronic Outputs

Feature	6AG1226-6RA32-5XB0	Fail-safe electronic output module	Standard relay output module
Output technology	Mechanical relay contacts	Electronic switching	Mechanical relay contacts
Main function	Fail-safe relay switching	Fail-safe electronic switching	General-purpose relay switching
Output count	2	Model-dependent	Model-dependent
Circuits per output	2	Model-dependent	Model-dependent
Supported voltage	5–30 V DC; 5–250 V AC	Model-dependent	Model-dependent
Maximum current	5 A per circuit, subject to load conditions	Model-dependent	Model-dependent
Switching frequency	Depends on load category	Depends on the output design	Depends on relay and load characteristics
Mechanical contact wear	Present	No mechanical output contacts	Present
Safety capability	Up to PL e / SIL 3 under applicable conditions	Depends on the specified module	Do not assume fail-safe capability
Environmental version	SIPLUS	Standard or SIPLUS	Standard or other variant
Dimensions	70 × 100 × 75 mm	Model-dependent	Model-dependent
Weight (kg)	Approx. 0.300 kg	Model-dependent	Model-dependent

Relay outputs are useful where contact-based switching and the specified AC/DC voltage range are important.

Electronic outputs may be preferable in applications requiring different switching characteristics, provided that the selected module meets the electrical and safety requirements.

Neither technology is universally better. The choice depends on the load, switching frequency, contact requirements, environmental conditions, and safety architecture.

10. Installation and Commissioning Considerations

10.1 Verify the Load

Before connecting a relay output, confirm the rated voltage, current, load category, and switching frequency.

A load that is suitable under resistive conditions may have substantially different requirements if it is inductive.

Contact protection and external switching devices should be considered where necessary.

10.2 Confirm the Safety Controller

Verify that the selected controller supports the module and the required safety configuration.

Hardware compatibility, firmware requirements, PROFIsafe settings, and engineering-software support should be checked before installation.

10.3 Configure the Safety Program

The safety program must define the required behavior of the output channels.

This includes the conditions under which outputs are enabled or disabled and the response required when a safety condition occurs.

The configured behavior must be validated against the machine’s safety requirements.

10.4 Check Environmental Conditions

The specified operating temperature range is -25°C to +55°C.

The installation must also account for humidity, condensation, contamination, altitude, enclosure protection, and other relevant environmental factors.

Conformal coating does not eliminate the need for proper installation and environmental management.

10.5 Plan Cabinet Space

The nominal dimensions are 70 × 100 × 75 mm.

The cabinet layout should allow sufficient room for wiring, heat dissipation, maintenance, and access to connected terminals.

The complete installation should follow the module’s mounting and clearance requirements.

10.6 Perform Functional Testing

After installation, test the complete system according to the approved commissioning procedure.

Testing should verify the required output behavior, diagnostic response, communication, and response to relevant safety conditions.

Any change to safety-related equipment should be documented and validated as required by the application.

11. Purchasing and Replacement Checklist

Item	What to confirm	Why it matters
Full article number	6AG1226-6RA32-5XB0	Prevents confusion with related modules
Output configuration	Two relay outputs with two switching circuits per output	Confirms the required switching arrangement
Electrical ratings	Voltage and current limits	Ensures load compatibility
Load category	Resistive or inductive, AC or DC	Determines the permitted switching conditions
Safety communication	PROFIsafe compatibility	Supports system integration
Safety performance	Required PL or SIL for the application	Ensures the module is appropriate for the safety function
Environmental ratings	Operating temperature and other limits	Confirms suitability for the installation
Dimensions	70 × 100 × 75 mm	Supports cabinet planning
Weight (kg)	Approximately 0.300 kg	Supports logistics and handling
Product condition	New, unused surplus, refurbished, or used	Clarifies purchasing expectations
Replacement procedure	Configuration checks and validation	Helps ensure correct operation after replacement

12. Final Summary

The 6AG1226-6RA32-5XB0 is a SIPLUS S7-1200 SM 1226 F-DQ fail-safe relay output module intended for safety-related industrial switching applications.

Its principal characteristics include:

• Two relay output channels.
• Two switching circuits per output.
• A maximum current rating of 5 A per circuit, subject to the permitted load conditions.
• A specified output voltage range of 5–30 V DC or 5–250 V AC.
• PROFIsafe communication within a compatible safety architecture.
• Support for applications up to PL e and SIL 3 under the applicable system conditions.
• Conformal coating and an operating temperature range of -25°C to +55°C.
• Nominal dimensions of 70 × 100 × 75 mm.
• Approximate product weight of 0.300 kg.

The module is relevant to safety-related machinery, packaging equipment, conveyor systems, automated production cells, and other industrial applications requiring compatible relay-based safety switching.

The related-model tables provide options for evaluating fail-safe input modules, electronic output modules, standard relay outputs, PLC CPUs, and general-purpose signal modules.

These products perform different functions and should not be treated as interchangeable without checking the complete specifications.

Final selection recommendation: Before purchasing or replacing this module, confirm the output load, contact ratings, controller compatibility, safety configuration, environmental limits, and mechanical requirements. For a safety-related installation, the complete system must be engineered, commissioned, and validated for its intended safety function.