theben DALI-Gateway S128 KNX Gateway (4940302)

Description

Introduction

The theben DALI-Gateway S128 KNX (Item no. 4940302) acts as an advanced interface connecting DALI lighting infrastructure directly with a standardized KNX building automation system. Featuring DALI-2 certification, this 4-module DIN rail device delivers robust multi-channel lighting control for commercial and residential automation projects. This device is part of our KNX system devices range.

Equipped with 2 independent channels capable of supporting up to 64 DALI members per output (2×64 DALI lights in total), the gateway provides reliable system integration. It operates on a main supply voltage of 100-240 V AC/DC while drawing less than 10 mA from the KNX bus.

Key Features

• 2 independent DALI output channels supporting up to 64 DALI members each (2×64 lights maximum).
• Official DALI-2 certification for modern lighting control standards.
• Standard DIN rail mounting configuration with a 4-module width.
• Screw terminal power connections and standard KNX bus terminal block.
• Operating temperature range suited for technical environments from -5°C to 45°C.
• IP20 type of protection and Protection Class I compliance.

Benefits

• Provides reliable two-way interface communication between KNX automation networks and DALI lighting systems.
• DALI-2 certified quality ensuring standardized interoperability across connected lighting fixtures.
• Dual-channel architecture supporting up to 2×64 DALI members for efficient lighting circuit design.
• Wide operating voltage range from 100 V AC/DC to 240 V AC/DC at 50-60 Hz.
• Compact DIN rail form factor requiring only 4 width modules in the distribution board.
• Low power consumption on the KNX bus line rated at under 10 mA.

Technical Specifications

Specification	Value
Operating Voltage KNX	Bus voltage, <10 mA
Operating Voltage	100 V AC/DC – 240 V AC/DC, 50 Hz – 60 Hz
Frequency	50 – 60 Hz
Width	4 modules
Installation Type	DIN rail
Type of Connection	Terminal screws | Bus connection: KNX bus terminal
Ambient Temperature	-5°C … 45°C
Stock Temperature	-25°C … 70°C
Operating Instructions	PDF available
Protection Class	I
Handbook	PDF available
Information Notice EU Data Act	PDF available
CE Declaration of Conformity	PDF available
Data Sheet	PDF available
Type of Protection	IP 20
KNX-Database (Single Product)	ZIP available
KNX-Database (All Products)	ZIP available

Applications

• Commercial building lighting automation integrating KNX control systems with DALI luminaires.
• Multi-zone lighting control setups requiring dual DALI channels for managing up to 128 DALI members.
• Distribution board mounting in smart building projects requiring 4-module DIN rail components.

Installation Notes

• Mount the device directly onto standard DIN rails in a protected cabinet meeting IP20 enclosure standards.
• Connect mains power via terminal screws (100–240 V AC/DC, 50–60 Hz) and connect the KNX bus line using the standard KNX bus terminal.
• Ensure ambient operating temperatures remain within the certified range of -5°C to 45°C.

Developer Resources

• KNX Database Single Product ZIP file for ETS system configuration.
• Full KNX Database ZIP file containing all brand product entry files.
• Official Product Handbook PDF and technical Data Sheet PDF.
• Operating Instructions PDF and CE Declaration of Conformity documentation.

FAQ

How many DALI lights can be connected to the theben DALI-Gateway S128 KNX?

The gateway features 2 channels that each support a maximum of 64 DALI members, allowing up to 128 DALI lights total (2×64). Explore more products from theben for professional building automation projects.

What power supply parameters does the gateway require?

It operates on a main supply of 100 V AC/DC to 240 V AC/DC (50-60 Hz) and draws less than 10 mA from the connected KNX bus. For certificates and current technical files, refer to the official product documentation.

What is the mounting format and width requirement for SKU 4940302?

It is designed for DIN rail mounting and requires a width of 4 modules inside the control enclosure.

What is the exact product model?

The order/model code for this page is 4940302. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by theben.

Where can I find the official technical documentation?

Use the manufacturer product page and datasheets for this exact SKU. Always verify the latest revision before specifying the product.

Conclusion

The theben DALI-Gateway S128 KNX (4940302) provides a DALI-2 certified 2-channel solution for connecting up to 128 DALI lights to a KNX automation system. Installers and system integrators can review our KNX dealer program options.

Its 4-module DIN rail design and wide 100-240V operating voltage make it a dependable choice for professional building automation projects.