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The Siemens 6AG1326-2BF41-2AB0 SIPLUS S7-300 Fail-Safe Digital Output Module is a safety-oriented digital output module used in SIPLUS S7-300 control architectures. It provides fail-safe output interfaces between the PLC safety program and field devices such as actuators, contactors, valves, and other switching equipment.
As part of the S7-300 fail-safe I/O family, the module is used where output commands must be handled with additional consideration for machine and process safety. The PLC generates the required output commands, while the fail-safe output module transfers those commands to connected field devices and supports the safety-oriented architecture of the control system.
The SIPLUS designation also makes this type of module suitable for demanding industrial environments where enhanced environmental robustness is required compared with standard automation hardware.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1326-2BF41-2AB0 |
| Product Family | SIPLUS S7-300 |
| Product Type | Fail-Safe Digital Output Module |
| Module Function | Digital Output / Safety Output |
| Application | Fail-Safe Automation and Machine Control |
| System | Siemens S7-300 |
| Dimensions | 80 × 125 × 120 mm |
| Weight | 0.503 kg |
The 6AG1326-2BF41-2AB0 is intended for applications where digital output signals form part of a safety-related control architecture.
Key features include:
The module acts as the output interface between the fail-safe PLC program and connected field devices.
Typical control path:
Safety PLC Program → S7-300 Backplane → 6AG1326-2BF41-2AB0 → Field Actuator → Machine / Process
During operation:
This architecture allows safety-related output commands to be handled separately from ordinary standard I/O functions.
The module normally works together with the CPU, communication, power, and field-level components of the S7-300 architecture.
| System Component | Function |
|---|---|
| S7-300 Fail-Safe CPU | Executes safety and control logic |
| Fail-Safe Digital Output Module | Sends safety-related output commands |
| Digital Input Modules | Acquire field status signals |
| ET 200 / Field I/O | Interfaces with distributed field devices |
| Safety Sensors | Detect hazardous conditions |
| Contactors / Valves | Execute safety-related actions |
| Engineering Software | Configures and programs the control system |
The output module therefore forms the final electrical interface between safety control logic and many field-level actuators.
| Industry | Typical Application |
|---|---|
| Manufacturing | Machine safety control |
| Automotive | Production line safety circuits |
| Packaging | Emergency shutdown and actuator control |
| Material Handling | Conveyor and equipment protection |
| Process Industry | Safety-related process outputs |
| Industrial Automation | Fail-safe actuator switching |
| Machinery | Protective and shutdown functions |
Typical applications include controlling safety-related contactors, valves, shutdown devices, and other discrete actuators.
The 6AG1326-2BF41-2AB0 should be integrated according to the electrical and safety requirements of the complete S7-300 system.
Important considerations include:
For a replacement project, the existing hardware configuration and safety program should be checked before substituting the module.
The module can form part of a broader Siemens safety automation architecture involving:
| Component | Purpose |
|---|---|
| SIPLUS S7-300 CPU | Main control and safety processing |
| Fail-Safe Digital Input Module | Safety signal acquisition |
| Fail-Safe Digital Output Module | Safety actuator control |
| Standard S7-300 I/O | General-purpose automation signals |
| ET 200 Distributed I/O | Remote field interfaces |
| Safety Sensors | Hazard detection |
| Contactors and Valves | Physical safety action |
The exact combination depends on the required safety function, I/O architecture, and machine design.
| Model | Product Type | Application |
|---|---|---|
| Siemens 6AG1326-2BF41-2AB0 | SIPLUS S7-300 Fail-Safe Digital Output Module | Safety-related digital outputs |
| Siemens 6AG1326-2BF10-2AB0 | SIPLUS S7-300 Fail-Safe Digital Output Module | Fail-safe output control |
| Siemens 6AG1326-2BF10-2AY0 | SIPLUS S7-300 Fail-Safe Digital Output Module | Safety output applications |
| Siemens 6AG1326-1BK02-2AB0 | SIPLUS S7-300 Fail-Safe Digital Input Module | Fail-safe signal acquisition |
| Siemens 6AG1326-1RF01-4AB0 | SIPLUS S7-300 Fail-Safe Digital Input Module | Safety input applications |
When selecting a replacement, the output configuration, system architecture, safety requirements, and existing hardware configuration should be checked carefully.
The module provides fail-safe digital output functionality in SIPLUS S7-300 automation systems, allowing safety-related control commands to be sent to connected field devices.
Depending on the configured application and electrical requirements, fail-safe outputs can be used with devices such as contactors, valves, actuators, and other discrete safety-related equipment.
A fail-safe output module is intended for safety-related control architectures and incorporates the diagnostic and safety-oriented characteristics required by the corresponding system configuration.
It is a system module intended for integration into the appropriate Siemens S7-300/SIPLUS architecture. Compatibility with the CPU, rack configuration, engineering environment, and safety application should be confirmed before installation.