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- Siemens
- 6AG2193-6BP20-4BA0
- BaseUnit
- Germany
- 15 × 141 × 35 mm
- 0.05 kg
- Xiamen, China
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Product Overview
The Siemens 6AG2193-6BP20-4BA0 is a SIPLUS ET 200SP BaseUnit used to establish the electrical connections between an ET 200SP I/O module and the surrounding field wiring. Rather than processing input signals or switching outputs itself, the BaseUnit provides the terminal structure through which power potentials, auxiliary connections, and process signals are routed within the distributed I/O station.
This version is identified as BU15-P16+A10+2B TX RAIL, type A0. It is based on the standard 6ES7193-6BP20-0BA0 BaseUnit and incorporates conformal coating for railway-related and demanding industrial environments. Its push-in terminals allow conductors to be connected without conventional screw-terminal tightening, which is useful when assembling cabinets containing numerous I/O channels.
The terminal arrangement supports 16 process connections to the installed I/O module, 10 AUX terminals, and the P1 and P2 potential buses. The AUX terminals are bridged to the left, and the BaseUnit is intended to remain part of the ET 200SP station’s defined potential-group arrangement. These details matter when planning the distribution of control voltage, protective or auxiliary connections, and field signal wiring.
The SIPLUS version is particularly relevant where temperature variation, vibration, and environmental exposure must be considered alongside normal electrical requirements. In railway-related installations, the specified environmental and railway standards are part of the product’s application profile. Engineers should still verify the required mounting orientation, load current, potential-group arrangement, and compatibility with the selected ET 200SP I/O module before installing the unit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Product Type | SIPLUS ET 200SP BaseUnit |
| Model | 6AG2193-6BP20-4BA0 |
| Product Family | SIPLUS ET 200SP |
| Product Designation | BU15-P16+A10+2B TX RAIL |
| BaseUnit Type | BU type A0 |
| Standard BaseUnit Reference | 6ES7193-6BP20-0BA0 |
| Terminal Type | Push-in |
| Process Terminals | 16 |
| AUX Terminals | 10 |
| Potential Bus Connections | P1 and P2 |
| AUX Terminal Arrangement | Bridged to the left |
| Load Group | Existing potential group |
| Rated Supply Voltage | 24 V DC |
| Maximum Current per Potential Group | 10 A |
| Maximum Current per Process Terminal | 2 A |
| Maximum Current for AUX Bus | 10 A |
| External Supply Protection | 24 V DC, 10 A miniature circuit breaker, type B or C |
| Conformal Coating | Yes |
| Operating Temperature, Horizontal Installation | -40 to +70 °C; +85 °C for 10 minutes under specified railway temperature conditions |
| Operating Temperature, Vertical Installation | -40 to +50 °C |
| Railway Application Standards | Includes applicable EN 50121, EN 50124, EN 50125, EN 50155 and EN 61373 requirements, subject to the specified conditions |
| Dimensions | 15 × 141 × 35 mm |
| Weight | 0.05 kg |
Product Features
- BU type A0 configuration: Supports compatible ET 200SP I/O modules using the corresponding BaseUnit arrangement.
- 16 process terminals: Provides electrical connections between the installed I/O module and field circuits.
- 10 AUX terminals: Supports auxiliary potential distribution through the designated AUX bus.
- P1 and P2 potential buses: Carries the specified supply potentials through the ET 200SP station.
- Push-in connections: Simplifies conductor installation and reduces the need for screw-terminal tightening.
- Conformal coating: Adds a protective layer to electronic assemblies for the specified environmental application.
- Railway-oriented environmental capability: Supports defined temperature, shock, vibration, and electromagnetic compatibility requirements under applicable installation conditions.
- Existing potential-group arrangement: The AUX terminals are bridged to the left, which must be considered when planning the station’s electrical distribution.
- DIN rail installation: Integrates into the modular ET 200SP station assembly.
Working Principle
The 6AG2193-6BP20-4BA0 functions as the electrical connection point beneath a compatible ET 200SP I/O module. Field conductors terminate at the BaseUnit, while the installed I/O module handles the actual acquisition or switching of process signals. The BaseUnit itself does not execute PLC logic or convert analog measurements into digital values.
Its role can be understood through a typical distributed I/O arrangement:
PLC or Controller → ET 200SP Interface Module → ET 200SP Backplane Bus → I/O Module → BaseUnit Terminals → Field Wiring
The exact signal path depends on the type of I/O module installed. For a digital input module, field signals enter through the BaseUnit terminals and are processed by the electronic module. For a digital output module, switching commands are converted into electrical output states and routed through the corresponding terminals to the connected devices.
The P1 and P2 potential buses distribute the designated supply potentials within the station. The 10 AUX terminals provide an additional connection arrangement, with the terminals bridged to the left. Because the AUX arrangement is linked to the existing potential group, engineers must verify how the station’s power distribution is configured before connecting external circuits.
The push-in terminals simplify field wiring, but they do not eliminate the need to check conductor specifications, terminal assignments, and current limits. Each process terminal has a specified maximum current of 2 A, while the maximum current per potential group is 10 A. These limits must be considered separately when several loads share the same supply group.
The SIPLUS construction adds conformal coating and specified environmental capabilities for demanding installations. In railway applications, the mounting orientation, operating temperature, vibration exposure, and relevant installation standards must all be considered. The coating does not make the BaseUnit suitable for every environment, nor does it replace correct enclosure design or electrical protection.
Role in the SIMATIC ET 200SP Control Architecture
Within a SIMATIC ET 200SP station, the 6AG2193-6BP20-4BA0 forms the physical terminal interface between the I/O module and the field wiring. It supports the station’s electrical connections and potential distribution while allowing the electronic module to be installed in the appropriate BaseUnit configuration.
Controller → ET 200SP Interface → Backplane Bus → I/O Module → BaseUnit → Sensors and Actuators
| System Component | Function |
|---|---|
| SIMATIC PLC or Controller | Executes automation logic and processes input and output data |
| ET 200SP Interface Module | Connects the distributed I/O station to the controller network |
| 6AG2193-6BP20-4BA0 BaseUnit | Provides process terminals, AUX connections, and potential-bus connections |
| Compatible ET 200SP I/O Module | Acquires input signals or switches output circuits |
| P1 and P2 Potential Buses | Distributes the designated supply potentials within the station |
| AUX Bus | Provides the specified auxiliary connection arrangement |
| 24 V DC Power Supply | Supplies the required control or field-circuit voltage |
| Field Sensors | Supply process measurements or discrete status signals |
| Field Actuators | Respond to output signals generated by the corresponding I/O module |
The installed I/O module determines the signal function, while the BaseUnit determines the relevant terminal and potential connection arrangement. The two components must therefore be selected as a compatible combination rather than as independent parts.
Industrial Applications
| Application | Typical Use |
|---|---|
| Railway Automation | Providing terminal connections for distributed I/O in suitable railway installations |
| Rolling Stock Control Systems | Supporting electrical connections for compatible ET 200SP I/O modules |
| Industrial Control Cabinets | Organizing field wiring and potential distribution in modular automation stations |
| Transportation Infrastructure | Connecting sensors and actuators to distributed control equipment |
| Machine Automation | Providing terminal interfaces for digital and analog I/O modules |
| Process Monitoring | Routing field signals through the appropriate installed I/O module |
| Environmental Control Systems | Supporting distributed sensor and actuator connections in demanding environments |
| Industrial Equipment Subject to Vibration | Providing a BaseUnit option for applications that meet the specified environmental requirements |
The BaseUnit is a connection component rather than an independent controller. Its suitability for a particular installation depends on the I/O module, electrical load, wiring arrangement, environmental conditions, and applicable system requirements.
Installation and Maintenance
- Verify the complete order number: Confirm that the installed component is 6AG2193-6BP20-4BA0 and that the required configuration is BU15-P16+A10+2B TX RAIL, type A0.
- Check I/O module compatibility: Confirm that the electronic module is suitable for the BU type A0 BaseUnit and the required process-terminal arrangement.
- Isolate the power supply: Disconnect the relevant electrical supplies and follow the site’s lockout procedure before installation or maintenance.
- Inspect the DIN rail: Check the mounting rail and surrounding station components for damage, contamination, or mechanical interference.
- Confirm the potential-group arrangement: Verify the existing P1 and P2 bus connections and the AUX terminals bridged to the left before connecting external circuits.
- Check conductor specifications: Ensure that the selected conductors and ferrules, where used, are compatible with the push-in terminal requirements.
- Observe terminal current limits: Keep each process terminal within its 2 A maximum and each potential group within its 10 A maximum.
- Verify external protection: Confirm that the supply wiring has the specified external protection and that the protective device matches the actual circuit design.
- Install the BaseUnit correctly: Secure the unit in the designated ET 200SP station position and confirm proper mechanical engagement.
- Check field wiring: Compare every conductor with the electrical drawings, paying particular attention to supply potentials, AUX connections, and process-signal assignments.
- Inspect environmental conditions: Verify that the installation orientation, temperature, vibration exposure, and enclosure conditions remain within the applicable operating requirements.
- Perform commissioning checks: Restore power under the approved procedure, inspect the station for wiring faults, and confirm that the installed I/O module communicates and operates correctly.
If an I/O channel fails after installation, inspect the field wiring, terminal engagement, supply distribution, and electronic module before replacing the BaseUnit. A fault in the connected I/O module or field circuit can produce symptoms that are not caused by the BaseUnit itself.
Compatible System Components
The 6AG2193-6BP20-4BA0 is intended for use within the SIMATIC ET 200SP platform. The following component categories may form part of the same station, provided that their electrical and mechanical requirements match the installed configuration.
| Component | Function |
|---|---|
| Compatible ET 200SP I/O Modules | Process digital or analog signals through the BaseUnit connection interface |
| SIMATIC ET 200SP Interface Module | Provides communication between the distributed station and controller |
| SIMATIC PLC | Executes control logic and processes I/O data |
| 24 V DC Power Supply | Supplies the required control and field-circuit voltage |
| ET 200SP Potential Distribution Components | Support the station’s defined supply and potential-group arrangement |
| DIN Rail | Provides the mechanical mounting structure for the station |
| Compatible Push-In Conductors | Connect field circuits to the BaseUnit terminals |
| Field Sensors | Supply measurement or status signals to compatible input modules |
| Field Actuators | Receive switching signals from compatible output modules |
Recommended Related Models
| Model | Product Type | Relevance |
|---|---|---|
| Siemens 6ES7193-6BP20-0BA0 | SIMATIC ET 200SP BaseUnit | Standard BaseUnit reference on which the SIPLUS version is based |
| Siemens 6AG2193-6BP20-4DA0 | SIPLUS ET 200SP BaseUnit | Related type A0 version with a different AUX terminal arrangement |
| Siemens 6AG2193-6BP00-4BA0 | SIPLUS ET 200SP BaseUnit | Related type A0 BaseUnit without the same 10-terminal AUX arrangement |
| Siemens 6AG2193-6BP00-4DA0 | SIPLUS ET 200SP BaseUnit | Related SIPLUS BaseUnit with a different potential and AUX configuration |
| Siemens 6ES7193-6BP00-0BA0 | SIMATIC ET 200SP BaseUnit | Standard BaseUnit reference for a related type A0 configuration |
| Siemens 6ES7193-6BP20-0DA0 | SIMATIC ET 200SP BaseUnit | Standard BaseUnit reference associated with the related SIPLUS 6AG2193-6BP20-4DA0 variant |
Key Advantages
- Provides 16 process terminals and 10 AUX terminals in a compact ET 200SP BaseUnit arrangement.
- Uses push-in connections for convenient field wiring.
- Supports P1 and P2 potential-bus connections within the distributed I/O station.
- Incorporates conformal coating for specified demanding environmental applications.
- Supports compatible ET 200SP I/O modules in railway-related and industrial installations.
Technical FAQs
What is the difference between the 6AG2193-6BP20-4BA0 and a standard ET 200SP BaseUnit?
The 6AG2193-6BP20-4BA0 is a SIPLUS version based on the 6ES7193-6BP20-0BA0 configuration. It incorporates conformal coating and specified environmental capabilities for demanding applications. Selection should account for the environmental conditions and the exact terminal and potential arrangement required by the station.
Can this BaseUnit be used with any SIMATIC ET 200SP I/O module?
No. The electronic module must be compatible with the BaseUnit type and terminal arrangement. The 6AG2193-6BP20-4BA0 is designated BU type A0, so the I/O module and station configuration must support that BaseUnit type.
What should be checked when connecting the AUX terminals?
This model has 10 AUX terminals bridged to the left. Before wiring, verify the intended auxiliary potential, the existing potential-group arrangement, and the electrical drawings. Do not assume that the AUX terminals can be used for an independent potential group without checking the actual configuration.
Is the BaseUnit suitable for railway applications with temperature and vibration exposure?
It is intended for specified SIPLUS railway-related applications and has defined environmental capabilities. Suitability still depends on installation orientation, operating temperature, vibration and shock conditions, and the applicable railway standards. The actual installation must remain within those specified limits.