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- Siemens
- 6AG1131-6BF01-7BA0
- Digital Input Module
- Germany
- 15 × 73 × 58 mm
- 0.028 kg
- Xiamen, China
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Product Overview
Reliable digital signal acquisition is essential for modern PLC and distributed automation systems. The Siemens 6AG1131-6BF01-7BA0 is a SIPLUS ET 200SP digital input module designed to acquire 24 V DC binary signals from industrial field devices and transfer their status through the ET 200SP distributed I/O architecture.
This module provides 8 digital inputs and is based on the standard 6ES7131-6BF01-0BA0 digital input platform. The SIPLUS version adds a conformal coating and is designed for an extended operating temperature range of -40 °C to +70 °C, making it suitable for demanding industrial environments.
The 6AG1131-6BF01-7BA0 is designed for use with BU type A0 BaseUnits and uses a compact electronic-module format. It is particularly suitable for applications where digital sensors, switches, position devices, and machine-status signals need to be collected through a distributed ET 200SP station.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Siemens |
| Model | 6AG1131-6BF01-7BA0 |
| Product Family | SIPLUS ET 200SP |
| Product Type | Digital Input Module |
| Number of Digital Inputs | 8 |
| Input Voltage | 24 V DC |
| Input Voltage Range | 19.2 to 28.8 V DC |
| Input Type | Type 3 according to IEC 61131 |
| Input Characteristic | Sink input / PNP |
| Input Current at Signal 1 | Approx. 2.5 mA |
| Input Delay | 0.05 to 20 ms |
| BaseUnit Compatibility | BU Type A0 |
| Color Code | CC01 |
| Diagnostics | Sensor supply short circuit, wire break, supply voltage |
| Conformal Coating | Yes |
| Operating Temperature | -40 °C to +70 °C |
| Dimensions | 15 × 73 × 58 mm |
| Weight | Approx. 0.028 kg / 28 g |
| Installation | ET 200SP distributed I/O station |
| Application | Industrial digital signal acquisition |
| Protection Rating | IP20 |
| Product Family Type | SIPLUS digital inputs |
Function and Working Principle
The Siemens 6AG1131-6BF01-7BA0 receives binary signals from field devices and makes their status available to the higher-level control system through the ET 200SP distributed I/O architecture.
Its eight input channels are designed for 24 V DC digital signals. Depending on the machine or process, the inputs can receive signals from proximity sensors, optical sensors, switches, position sensors, auxiliary contacts, and other compatible binary devices.
The basic signal path is:
Field Device → 24 V DC Digital Signal → 6AG1131-6BF01-7BA0 → ET 200SP Backplane → Interface Module → PLC / Controller
When a connected field device changes state, the corresponding input channel detects the electrical signal. The ET 200SP station then transfers this information through its internal backplane to the control system.
The configurable input delay range of 0.05 to 20 ms allows the module to accommodate different signal characteristics and application requirements. Built-in diagnostic functions can also help identify problems involving sensor supply, wiring, or supply voltage.
Role in Industrial Control Systems
The 6AG1131-6BF01-7BA0 provides the digital interface between field-level devices and the automation controller.
Typical signals that can be collected include:
- Proximity sensor signals
- Optical sensor signals
- Limit switch positions
- Machine running feedback
- Valve position feedback
- Push-button signals
- Auxiliary contact status
- Equipment interlock signals
- Pressure switch signals
- Level switch signals
- Machine operating status
Because the module belongs to the ET 200SP distributed I/O platform, it can be installed close to the equipment generating these signals. This helps reduce long individual signal cables between field devices and the central PLC cabinet.
The diagnostic capability is also useful for maintenance because wiring faults and supply-related problems can be identified more efficiently than with a simple input-only architecture.
Industrial Applications
The Siemens 6AG1131-6BF01-7BA0 can be used in a wide range of industrial automation applications, including:
- Factory automation
- Machine control
- Manufacturing lines
- Packaging machinery
- Conveyor systems
- Material handling equipment
- Assembly machines
- Process automation
- Motor control systems
- Industrial monitoring
- Distributed PLC systems
- Production equipment
- Outdoor or environmentally demanding automation installations
Its SIPLUS construction, conformal coating, and extended temperature range make it particularly suitable for applications where environmental conditions are more demanding than those normally encountered by standard automation modules.
Installation and System Integration
The 6AG1131-6BF01-7BA0 is designed to be installed as an electronic module within the Siemens ET 200SP distributed I/O system.
A typical installation process includes:
- Install the ET 200SP station on the appropriate DIN rail.
- Select the compatible BU Type A0 BaseUnit.
- Install the BaseUnit in the required station position.
- Mount the 6AG1131-6BF01-7BA0 onto the BaseUnit.
- Connect the 24 V DC field devices according to the application wiring design.
- Verify sensor supply and reference connections.
- Connect the ET 200SP station to the appropriate interface and PLC architecture.
- Configure the digital input module in the engineering environment.
- Check the input status and diagnostic information.
- Test each field signal before commissioning the machine.
The module itself is not intended to operate as an independent standalone digital input device. The appropriate BaseUnit and ET 200SP station components are required for normal system operation.
During replacement work, engineers should also verify the original module number, BaseUnit type, wiring arrangement, controller configuration, and environmental requirements.
Compatible System Components
The 6AG1131-6BF01-7BA0 normally operates together with the following ET 200SP and field-level components:
| Component | Function |
| ET 200SP BU Type A0 BaseUnit | Mechanical and electrical interface for the module |
| ET 200SP Interface Module | Connects the distributed I/O station to the control network |
| ET 200SP Server Module | Supports the station-end configuration where required |
| 24 V DC Power Supply | Provides required system and field power |
| Siemens PLC / Controller | Processes digital input information |
| Proximity Sensors | Provide binary machine-position signals |
| Optical Sensors | Detect objects and machine conditions |
| Limit Switches | Provide position and travel information |
| Auxiliary Contacts | Provide equipment status feedback |
| ET 200SP Backplane | Provides internal communication between station modules |
The exact combination depends on the overall ET 200SP station design, controller, communication interface, BaseUnit configuration, and field-device requirements.
Recommended Alternative Models
The following models may be considered when designing or maintaining Siemens digital input systems. The correct choice depends on the required input characteristics, environmental conditions, BaseUnit, and automation platform.
| Model | Type | Key Feature | Application |
| 6AG1131-6BF01-7BA0 | SIPLUS ET 200SP Digital Input | 8 × 24 V DC inputs, conformal coating | Demanding industrial environments |
| 6ES7131-6BF01-0BA0 | ET 200SP Digital Input | Standard 8 × 24 V DC input module | General ET 200SP applications |
| 6AG1131-6BF00-7CA0 | SIPLUS ET 200SP Digital Input | 8 × 24 V DC digital inputs | Alternative SIPLUS input configuration |
| ET 200SP Digital Input Modules | Distributed I/O | Multiple input configurations | Flexible field signal acquisition |
| SIPLUS ET 200SP Digital Input Modules | Enhanced Distributed I/O | Extended environmental capability | Harsh industrial applications |
The 6ES7131-6BF01-0BA0 is the most directly related standard platform because the 6AG1131-6BF01-7BA0 is based on it. However, the standard and SIPLUS versions should not automatically be considered interchangeable for every application because environmental requirements, temperature range, and system configuration must be evaluated.
Key Advantages
- Provides 8 digital input channels
- Designed for 24 V DC industrial signals
- Based on the Siemens ET 200SP architecture
- Compatible with BU Type A0 BaseUnits
- Supports Type 3 input characteristics according to IEC 61131
- Provides adjustable input delay from 0.05 to 20 ms
- Includes module diagnostic functions
- Supports detection of sensor-supply short circuits
- Supports wire-break diagnostics
- Provides supply-voltage diagnostics
- Conformal-coated SIPLUS construction
- Extended operating temperature range of -40 °C to +70 °C
- Compact 15 × 73 × 58 mm design
- Lightweight construction of approximately 28 g
- Suitable for distributed machine and process I/O
- Supports common industrial sensors and switching devices
Technical FAQs
What is the Siemens 6AG1131-6BF01-7BA0?
The Siemens 6AG1131-6BF01-7BA0 is a SIPLUS ET 200SP digital input module with 8 × 24 V DC inputs designed for distributed industrial automation systems.
How many digital inputs does it provide?
The module provides 8 digital input channels.
What is the input voltage?
The module is designed for a nominal 24 V DC input supply, with an input voltage range of approximately 19.2 to 28.8 V DC.
What are the dimensions of the 6AG1131-6BF01-7BA0?
The module dimensions are approximately 15 × 73 × 58 mm.
How much does the module weigh?
The module weighs approximately 0.028 kg, or 28 g.
What BaseUnit does it use?
The 6AG1131-6BF01-7BA0 is designed for use with a BU Type A0 BaseUnit.
What type of digital input does it provide?
The module uses a Type 3 input characteristic according to IEC 61131 and is configured as a sink input / PNP input arrangement.
What is the input delay?
The input delay can be configured within a range of approximately 0.05 to 20 ms, depending on the application configuration.
Does the module provide diagnostics?
Yes. The module provides diagnostic functions for conditions including sensor-supply short circuits, wire breaks, and supply-voltage problems.
Is the 6AG1131-6BF01-7BA0 suitable for harsh environments?
Yes. As a SIPLUS module, it features conformal coating and an extended operating temperature range of -40 °C to +70 °C, making it suitable for demanding industrial environments.
What is the standard module associated with this SIPLUS version?
The 6AG1131-6BF01-7BA0 is based on the 6ES7131-6BF01-0BA0 standard ET 200SP digital input module.
Can the module work without an ET 200SP BaseUnit?
No. It is an electronic module designed for the ET 200SP distributed I/O system and requires the appropriate BaseUnit and supporting system components.
Conclusion
The Siemens 6AG1131-6BF01-7BA0 is a compact SIPLUS ET 200SP digital input module designed for reliable acquisition of eight 24 V DC binary signals in distributed industrial automation systems.
Its combination of 8 digital inputs, 15 × 73 × 58 mm dimensions, approximately 28 g weight, BU Type A0 compatibility, configurable 0.05 to 20 ms input delay, diagnostic capabilities, conformal coating, and -40 °C to +70 °C operating temperature range makes it a practical solution for demanding machine and process automation applications.
By connecting field sensors, switches, position devices, and equipment-status contacts to an ET 200SP station, the 6AG1131-6BF01-7BA0 provides a structured interface between field equipment and PLC-based control systems. For replacement or new installations, the complete station configuration, BaseUnit, input wiring, controller architecture, and environmental requirements should be checked before selecting the module.