Description
Introduction
The ABB HS/S4.2.1 is a KNX outside light sensor interface for professional building-automation projects. It is listed by ABB with Product ID 2CDG120044R0011 and catalog description “HS/S4.2.1 Outside Light Sensor Interface, MDRC”. Explore more ABB building automation products for professional building automation projects.
The device can be used as a twilight switch in the 1 … 100 lux range or as a light value switch in the 100 … 20.000 lux range. One Outside Light Sensor LFO/A 1.1 is supplied with the device, supporting project delivery where exterior light measurement is required.
Key Features
- Brand: ABB
- Model / SKU: HS/S4.2.1
- Product ID: 2CDG120044R0011
- Catalog description: HS/S4.2.1 Outside Light Sensor Interface, MDRC
- Compatible bus system: KNX (TP)
- Number of channels: 10
- Illuminance: 1 … 100000 lx
- Degree of protection: IP20
Benefits
- Designed for KNX projects: the compatible bus system is KNX (TP), and the product range is KNX.
- Flexible light-based switching: the device can be used as a twilight switch or as a light value switch according to the stated lux ranges.
- Project-friendly channel capacity: the product data lists 10 channels for the HS/S4.2.1.
- Manual operation is supported, giving installers and commissioning teams a verified device feature to consider during planning.
- The product includes one Outside Light Sensor LFO/A 1.1, helping buyers match the quoted device package with ABB’s stated supply information.
- Clear documentation references are available in the product data, including Instructions and Manuals 2CDG941107P0002 and Declaration of Conformity – CE 2CDK507148D2701.
Technical Specifications
Applications
- KNX building-automation projects requiring an outside light sensor interface.
- Twilight switching applications within the stated 1 … 100 lux range.
- Light value switching applications within the stated 100 … 20.000 lux range.
- Commercial, residential, or project-based KNX sensor procurement where the BOQ specifies ABB HS/S4.2.1 or Product ID 2CDG120044R0011.
Installation Notes
- Verify that the project BOQ, drawings, and specification call for ABB HS/S4.2.1 and Product ID 2CDG120044R0011 before ordering.
- Use ABB Instructions and Manuals reference 2CDG941107P0002 for installation and commissioning guidance.
- Confirm the device’s IP20 degree of protection against the intended installation environment.
- Confirm that the supplied Outside Light Sensor LFO/A 1.1 matches the project documentation and delivery requirements.
Developer Resources
- Manufacturer product page: https://new.abb.com/products/en/2CDG120044R0011/hs-s-4-2-1
- Instructions and Manuals: 2CDG941107P0002
- Declaration of Conformity – CE: 2CDK507148D2701
- KNX Certificate: 9AKK105710A0046
- KNX Sensors category: https://knxbazzar.com/product-category/knx-sensors/
- ABB products on KNXbazzar: https://knxbazzar.com/knxshop/?brand=abb
FAQ
What is the ABB HS/S4.2.1 used for?
According to the product data, the ABB HS/S4.2.1 can be used as a twilight switch from 1 … 100 lux or as a light value switch from 100 … 20.000 lux. For certificates and current technical files, refer to the official ABB product page.
Is the ABB HS/S4.2.1 a KNX device?
Yes. The product data lists the compatible bus system as KNX (TP) and the product range as KNX.
How many channels does the HS/S4.2.1 have?
The product data lists the number of channels as 10.
Is an outside light sensor supplied with the HS/S4.2.1?
Yes. The long description states that one Outside Light Sensor LFO/A 1.1 is supplied with the device.
Which ABB references should be checked before procurement?
Check the SKU HS/S4.2.1, Product ID 2CDG120044R0011, manual reference 2CDG941107P0002, and Declaration of Conformity – CE reference 2CDK507148D2701 against the project documentation.
What is the exact product model?
The order/model code for this page is HS/S4.2.1. Match it against project documents before purchase.
Conclusion
The ABB HS/S4.2.1 Outside Light Sensor Interface, MDRC is a KNX (TP) device for twilight switching and light value switching, supplied with one Outside Light Sensor LFO/A 1.1. Installers and system integrators can review our dealer and project support options.
For reliable procurement, match the SKU HS/S4.2.1 and Product ID 2CDG120044R0011 with the project BOQ and refer to ABB’s official documentation before installation.
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