ABB AC/S1.2.1 Application Controller BACnet MDRC (2CDG110206R0011)

Description

Introduction

The ABB AC/S1.2.1 Application Controller (Product ID: 2CDG110206R0011) provides a holistic HVAC automation solution designed to bridge KNX (TP) bus networks with higher-level BACnet/IP architectures. Engineered as a Modular DIN Rail Component (MDRC), this device enables bidirectional data exchange between KNX installations and Building Management Systems (BMS) without requiring additional external engineering software. This device is part of our KNX AC Controller products range.

Designed to support energy efficiency objectives such as EN 15232 and LEED, the AC/S1.2.1 comes equipped with pre-defined automation modules and a graphical logic editor for custom logic creation. It also automatically generates a web-based user interface for intuitive KNX system monitoring and operational management.

Key Features

• Integrated BACnet/IP gateway functionality for bidirectional KNX and BACnet communications.
• Pre-defined modules: Schedule, Set Point Calculation, Heat Curve Calculation, Data Logging, and Device Monitoring.
• Graphical Logic Editor for custom Automation Module development.
• Automatically generated web-based User Interface for system management.
• MDRC form factor operating on a 24 V DC auxiliary voltage with a power loss rating of 3.
• IP20 environmental protection rating and battery-free design (0 batteries).
• Complete engineering and parameterization via ETS without additional external software.

Benefits

• Enables seamless bidirectional data exchange between KNX (TP) networks and BACnet/IP building management systems.
• Supports compliance with major energy efficiency standards including EN 15232 and LEED.
• Streamlines engineering workflows by conducting complete device configuration directly within ETS.
• Includes pre-defined HVAC modules for Schedule, Heat Curve Calculation, Set Point Calculation, Data Logging, and Device Monitoring.
• Features a built-in graphical Logic Editor to easily build and implement custom automation routines.
• Offers an automatically generated web-based User Interface for central monitoring and system management.

Technical Specifications

Specification	Value
Extended Product Type:	AC/S1.2.1
Product ID:	2CDG110206R0011
Instructions and Manuals:	2CDG941189P0003
Manual Operation:	No
Number of Batteries:	0
Declaration of Conformity – CE:	2CDK508235D2701
EAN:	4016779015806
Catalog Description:	AC/S1.2.1 Application Controller, BACnet, MDRC
Compatible Bus Systems:	KNX (TP) BACnet
Product Range:	KNX
SCIP:	f9ebbc07-310b-42ef-aec4-1f92e32128c5 Germany (DE)
Degree of Protection:	IP20
ETIM 9:	EC000676 – Logic component for bus system
WEEE B2C / B2B:	Business To Consumer
Identifier	Description
Environmental Degree of Protection	IP20
Degree of Protection	IP20
Long Description:	Automation Controller with pre-defined Automation Modules for a holistic Heating, Ventilation and Air Conditioning (HVAC) Automation Solution from Central HVAC to Room Automation to meet the Energy Efficiencies Objectives like EN 15232 or LEED. Automation Modules for example Schedule, Set Point Calculation, Heat Curve Calculation, Data Logging and Device Monitoring. Own Automation Modules can be created by a graphical Logic Editor. The Controller has an automatic generated web based User Interface to monitor and manage the KNX System. Built in BACnet/IP Gateway to connect the KNX System with Building Management Systems (BMS). Bidirectional data exchange between KNX and BACnet. The Engineering is done completely by the ETS. An additional external Software is not required.
Auxiliary Voltage AC/DC:	24 V DC
Power Loss:	3
2CDG120037R0011	CP-D24/2.5 priOn Power Supply, 24 V DC, 2.5 A, MDRC
Technical Data Sheet, Technical Information	2CDC508242D0211 Auxiliary Voltage AC/DC: 24 V DC Power Loss: 3 W Compatible Bus Systems: KNX (TP) BACnet Product Range: KNX Manual Operation: No Color: light grey Number of Batteries: 0
Data Sheet, Technical Information	2CDC508242D0211 Auxiliary Voltage AC/DC: 24 V DC Power Loss: 3 W Compatible Bus Systems: KNX (TP) BACnet Product Range: KNX Manual Operation: No Color: light grey Number of Batteries: 0
Mounting Type:	DIN-Rail
Installation Instructions and Manuals	2CDG941189P0003 Mounting Type: DIN-Rail

Applications

• Holistic HVAC automation projects covering central HVAC and room automation scenarios.
• Interfacing KNX (TP) bus structures with BACnet/IP Building Management Systems (BMS).
• Commercial and institutional automation projects targeting LEED or EN 15232 energy efficiency standards.

Installation Notes

• Mounts as a Modular DIN Rail Component (MDRC) within distribution boards supporting IP20 protection.
• Requires a standard 24 V DC auxiliary voltage supply for active operation.
• Designed for parameter-based automated operation without physical manual operation controls on the unit.

Developer Resources

• Instructions and Manuals Reference: 2CDG941189P0003
• Declaration of Conformity – CE Reference: 2CDK508235D2701
• ETIM 9 Classification: EC000676 (Logic component for bus system)
• SCIP Reference: f9ebbc07-310b-42ef-aec4-1f92e32128c5 Germany (DE)

FAQ

Is separate software required to commission the ABB AC/S1.2.1?

No, engineering for the ABB AC/S1.2.1 is performed completely through ETS without requiring external software. Explore more ABB KNX solutions for professional building automation projects.

What power supply is needed for the AC/S1.2.1 controller?

The controller operates using a 24 V DC auxiliary voltage supply. For certificates and current technical files, refer to the official ABB product page.

What protocols are supported by the AC/S1.2.1?

The unit supports KNX (TP) and BACnet/IP with bidirectional data exchange.

Does the AC/S1.2.1 include physical manual operation controls?

No, manual operation is not available on the device housing.

What is the exact product model?

The order/model code for this page is AC/S1.2.1. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by ABB.

Conclusion

The ABB AC/S1.2.1 Application Controller (2CDG110206R0011) is a versatile logic component and BACnet/IP gateway designed to manage complex HVAC applications across KNX installations. Installers and system integrators can review our dealer and project support options.

By incorporating web visualization, custom logic editing, pre-defined automation functions, and pure ETS commissioning, it delivers efficient system integration while supporting EN 15232 and LEED goals.