Product Overview

The Siemens 6AG2193-6BP20-4DA0 is a SIPLUS ET 200SP BaseUnit that provides the electrical connection between a compatible I/O module and its field wiring. Its configuration, BU15-P16+A10+2D TX RAIL, type A0, combines 16 process terminals with 10 AUX terminals and supports the establishment of a new load group within the distributed I/O station.

This BaseUnit is relevant when an ET 200SP station needs an additional group of I/O circuits with its own defined power distribution. For example, a railway control cabinet may use separate groups for equipment monitoring, auxiliary control signals, and actuator interfaces. The BaseUnit provides the terminal connections and potential arrangement, while the installed electronic module handles the actual input acquisition or output switching.

The 10 AUX terminals are particularly useful when the station requires auxiliary connections alongside the main process terminals. Their electrical arrangement must be considered during cabinet design, especially where different potential groups or auxiliary circuits are involved. The model also incorporates P1 and P2 power buses, which form part of the station’s internal supply distribution.

As a SIPLUS RAIL variant, the 6AG2193-6BP20-4DA0 is based on the standard 6ES7193-6BP20-0DA0 BaseUnit and incorporates conformal coating for specified demanding environmental conditions. Its railway-related environmental specifications make it relevant to installations exposed to temperature variation, vibration, and other operating stresses. Correct selection still depends on the I/O module, current requirements, load-group layout, and mounting conditions.

Technical Specifications

Product Features

• 16 process terminals: Provides connections between the installed electronic module and its assigned field circuits.
• 10 AUX terminals: Supports auxiliary potential distribution alongside the process connections.
• New load-group configuration: Allows a separate load group to be established within a compatible ET 200SP station.
• P1 and P2 power buses: Supports the station’s internal distribution of the designated supply potentials.
• Push-in terminal technology: Simplifies conductor installation and routine cabinet wiring.
• Type A0 design: Matches the relevant ET 200SP BaseUnit configuration.
• Conformal coating: Adds protection for the specified demanding environmental conditions.
• Railway-oriented environmental capability: Supports installations meeting the applicable temperature, vibration, shock, and electromagnetic compatibility requirements.
• Modular station integration: Works as part of a compatible ET 200SP assembly rather than as an independent signal-processing device.

Working Principle

The 6AG2193-6BP20-4DA0 provides the physical and electrical interface for an ET 200SP electronic module. Field conductors connect to its push-in terminals, and the installed I/O module processes the corresponding signals. The BaseUnit itself does not execute PLC logic or independently switch the process outputs.

A typical signal path is:

PLC or Controller → ET 200SP Interface Module → Backplane Bus → I/O Module → BaseUnit Terminals → Field Devices

For digital input applications, signals from switches, sensors, or status contacts pass through the terminal connections to the input module. For digital output applications, the output module switches the assigned electrical circuits, which are routed through the BaseUnit to compatible field devices. The actual function depends on the electronic module installed.

The defining feature of this model is its new-load-group arrangement. When a control cabinet is divided into separate electrical groups, the BaseUnit can provide the connection point for an additional group rather than simply continuing the preceding group’s arrangement. This distinction matters when planning supply distribution, protecting individual circuits, and separating groups of field devices.

The 10 AUX terminals provide additional connections for the designated auxiliary potential. They should not be treated as ten electrically independent supply points without checking the internal terminal arrangement and system wiring diagram. The P1 and P2 buses must also be connected according to the station’s power-distribution design.

Current limits apply to individual process terminals and the potential group. Each process terminal has a specified maximum current of 2 A, while the maximum current per potential group and for the AUX bus is 10 A. The external supply protection and conductor selection must be appropriate for the complete circuit, not just one terminal.

The SIPLUS construction adds conformal coating for the specified environmental application. This is relevant in railway-related control systems where operating temperature, vibration, and other environmental stresses need to be considered. The BaseUnit must still be installed with the correct electronic module, wiring arrangement, enclosure protection, and electrical safeguards.

Role in the SIMATIC ET 200SP Control Architecture

Within the SIMATIC ET 200SP architecture, the 6AG2193-6BP20-4DA0 provides the terminal interface and potential distribution for a compatible electronic module. Its new-load-group configuration allows the station to introduce an additional group of field circuits while maintaining the modular structure of the distributed I/O system.

SIMATIC PLC → ET 200SP Interface Module → Backplane Bus → I/O Module → BaseUnit → Field Circuits

The electronic module determines the signal-processing function, while the BaseUnit defines the physical terminal arrangement and supports the required potential distribution. The station configuration must account for both components.

Industrial Applications

The suitability of the BaseUnit depends on the electronic module, connected loads, supply distribution, and environmental conditions. It is a connection and distribution component, not a standalone controller or signal-processing module.

Installation and Maintenance

1. Verify the order number: Confirm that the component is 6AG2193-6BP20-4DA0 and that the required configuration is BU15-P16+A10+2D TX RAIL, type A0.
2. Check I/O module compatibility: Ensure that the selected ET 200SP electronic module supports the type A0 BaseUnit configuration.
3. Isolate the electrical supply: Follow the site’s lockout procedure and disconnect relevant power sources before installation or maintenance.
4. Confirm the load-group boundary: Verify that the installation requires a new load group at the planned position in the ET 200SP station.
5. Review the AUX connections: Check the 10 AUX terminals and their intended electrical potential against the station wiring diagram.
6. Inspect the mounting rail: Check the DIN rail and adjacent components for mechanical damage, contamination, or installation interference.
7. Prepare the conductors: Use compatible conductors and ferrules, where applicable, according to the push-in terminal requirements.
8. Verify terminal assignments: Match all field conductors to the electrical drawings before connecting the process and AUX terminals.
9. Check current distribution: Keep each process terminal within its 2 A maximum and observe the 10 A limits for the potential group and AUX bus.
10. Verify supply protection: Confirm that the supply circuit has suitable external protection and that the protective device matches the electrical design.
11. Inspect environmental conditions: Check mounting orientation, operating temperature, vibration exposure, and enclosure conditions against the applicable requirements.
12. Perform commissioning checks: Restore power under the approved procedure, confirm the hardware configuration, and test the connected I/O functions and field devices.

If an I/O channel fails after installation, check the supply distribution, AUX connections, terminal engagement, and electronic module before replacing the BaseUnit. A fault in the field wiring or installed I/O module can produce similar symptoms.

Compatible System Components

The 6AG2193-6BP20-4DA0 is intended for use within the SIMATIC ET 200SP platform. Compatible components must match the type A0 BaseUnit arrangement, the new-load-group configuration, and the electrical requirements of the connected field circuits.

Recommended Related Models

Key Advantages

• Provides 16 process terminals and 10 AUX terminals in one BaseUnit.
• Supports the establishment of a new load group within an ET 200SP station.
• Uses push-in terminals for convenient field wiring.
• Supports defined P1, P2, and AUX potential distribution.
• Incorporates conformal coating for specified demanding industrial and railway-related environments.

Technical FAQs

When should the 6AG2193-6BP20-4DA0 be selected instead of the 6AG2193-6BP20-4BA0?

Both models have 16 process terminals and 10 AUX terminals, but their load-group arrangements differ. The 6AG2193-6BP20-4DA0 is configured to start a new load group, whereas the 6AG2193-6BP20-4BA0 is configured to continue an existing load group. The station’s power-distribution layout determines which configuration is appropriate.

Can the 10 AUX terminals be used for unrelated electrical potentials?

Do not assume that they are independent connections. Their internal arrangement and intended auxiliary potential must be checked against the relevant wiring diagram. Connecting unrelated potentials without verifying the internal bridging can create an electrical fault.

What is the maximum current allowed through the process terminals?

The specified maximum current is 2 A per process terminal. The potential group and AUX bus have a maximum current of 10 A. Both individual terminal loading and aggregate current must be considered when planning connected circuits.

What installation factors matter for the SIPLUS RAIL version?

Check the required operating temperature, mounting orientation, vibration and shock exposure, electromagnetic compatibility, and applicable railway standards. The conformal coating supports the specified environmental application but does not replace correct enclosure protection, wiring, or electrical safeguards.