Description
Introduction
The ABB RC/A4.2 is a Room Controller Basis Device in the KNX Actuators category, identified by SKU RC/A4.2 and Product ID 2CDG110104R0011. It accommodates up to 4 plug-in modules and is designed to control their function while communicating as one bus device via the ABB i-bus®.

For consultants, installers, integrators, and buyers, the RC/A4.2 provides a clearly identifiable ABB basis device for modular room-control configurations. Any module type can be plugged into each module slot, and manual operation is available for functional tests.
Key Features
- Brand: ABB.
- SKU and Extended Product Type: RC/A4.2.
- Product ID: 2CDG110104R0011.
- Catalog Description: RC/A4.2 Room Controller Basis Device, 4 Modules, SM.
- Accommodates up to 4 plug-in modules.
- Controls the function of plug-in modules and communicates as one bus device via the ABB i-bus®.
- Any module type can be plugged into each module slot.
- Manual Operation: Yes; Number of Batteries: 0.
Benefits
- Supports modular planning by accommodating up to 4 plug-in modules in one room controller basis device.
- Communicates as one bus device via the ABB i-bus®, helping project teams specify the device clearly within ABB i-bus® based designs.
- Allows any module type to be plugged into each module slot, supporting flexible module-slot assignment within the stated product data.
- Includes manual operation for functional tests, giving installers a verified product function for commissioning checks.
- Provides strong procurement traceability through the exact ABB SKU RC/A4.2, Product ID 2CDG110104R0011, and EAN 4016779676472.
- Can be matched against official documentation references, including Instructions and Manuals 2CDG941061P0003 and Declaration of Conformity – CE 2CDK514073D2701.
Technical Specifications
Applications
Room-controller basis device applications requiring up to 4 plug-in modules.
ABB i-bus® projects where the installed basis device must communicate as one bus device.
KNX actuator schedules that specify ABB RC/A4.2 under the KNX Actuators category.
Project configurations using module types referenced in the product data, including binary input modules, switch actuator modules, shutter actuator modules, switch/dim actuator modules, light controller modules, and electronic switch actuator modules.
Installation Notes
- Verify the exact model RC/A4.2 and Product ID 2CDG110104R0011 against the bill of quantities before ordering or installation.
- Plan for up to 4 plug-in modules; the product data states that any module type can be plugged into each module slot.
- Use manual operation for functional tests as stated in the product description.
- Check the referenced Instructions and Manuals document number 2CDG941061P0003 and Declaration of Conformity – CE document number 2CDK514073D2701 when preparing project documentation.
- Confirm module selections against the ABB module references listed in the product data to avoid ordering the wrong accessory or module type.
Developer Resources
- Manufacturer product URL: https://new.abb.com/products/en/2CDG110104R0011/rc-a4-2.
- KNXbazzar category URL: https://knxbazzar.com/product-category/knx-actuators/.
- KNXbazzar ABB brand URL: https://knxbazzar.com/knxshop/?brand=abb.
- Instructions and Manuals reference: 2CDG941061P0003.
- Declaration of Conformity – CE reference: 2CDK514073D2701.
- EAN: 4016779676472.
- ETIM 9: EC001581 – Basic module for bus system.
- Referenced module entries include BE/M4.230.1, BE/M4.24.1, BE/M4.12.1, SA/M2.6.1, SA/M2.16.1, JA/M2.230.1, JA/M2.24.1, SD/M2.6.2, LR/M1.6.2, and ES/M2.230.1.
FAQ
What is the ABB RC/A4.2?
The ABB RC/A4.2 is a Room Controller Basis Device, 4 Modules, SM, in the KNX Actuators category. Its Product ID is 2CDG110104R0011.
How many plug-in modules can the RC/A4.2 accommodate?
The RC/A4.2 accommodates up to 4 plug-in modules.
How does the RC/A4.2 communicate on the bus?
It controls the function of the plug-in modules and communicates as one bus device via the ABB i-bus®.
Does the ABB RC/A4.2 support manual operation?
Yes. The product data states Manual Operation: Yes, and the description states manual operation for functional tests.
Which identifiers should buyers verify before ordering?
Verify SKU RC/A4.2, Product ID 2CDG110104R0011, EAN 4016779676472, manual reference 2CDG941061P0003, and the catalog description RC/A4.2 Room Controller Basis Device, 4 Modules, SM.
What is the exact product model?
The order/model code for this page is RC/A4.2. Match it against project documents before purchase.
Conclusion
The ABB RC/A4.2 is a modular Room Controller Basis Device for ABB i-bus® projects, accommodating up to 4 plug-in modules and communicating as one bus device.
For professional procurement and installation, specify RC/A4.2 exactly, verify Product ID 2CDG110104R0011, and align selected plug-in modules with the project BOQ and official documentation references.






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