theben HM 12 T KNX 12-Way Heating Actuator (4940245)

Description

Introduction

The theben HM 12 T KNX (Item no.: 4940245) is a high-performance 12-way heating actuator engineered for seamless integration into KNX building automation systems. Designed with FIX2 housing for DIN rail installation across 8 module widths, this unit provides precise control for thermal actuators across 12 output channels organized into 4 groups of 3 outputs each. This device is part of our KNX automation components range.

Featuring integrated P/PI temperature controllers for both heating and cooling applications, the HM 12 T KNX regulates output voltages ranging from 24 V AC to 240 V AC. Operating on standard KNX bus voltage (≤12 mA) alongside a main supply voltage of 110 V AC to 240 V AC at 50–60 Hz, it delivers reliable operation with low stand-by power consumption of approximately 0.5 W.

Key Features

• 12 independent Triac outputs rated at 0.45 A (450 mA) each.
• Integrated P/PI temperature controllers for heating and cooling.
• Supports voltage output from 24 V AC to 240 V AC (50–60 Hz).
• DIN rail installation with an 8-module width format.
• Low KNX bus current consumption of ≤12 mA.
• Wide terminal screw support for solid and stranded wire connection types.
• Protection class II according to EN 60 669.

Benefits

• Integrated Temperature Controllers: Equipped with built-in P and PI temperature controllers for both heating and cooling functions.
• Flexible Actuator Control: Manages up to 12 thermal actuators operating from 24 V AC to 240 V AC in 4 distinct groups with 3 outputs each.
• Low Stand-By Consumption: Ensures energy-efficient building operations with an idle power consumption of approximately 0.5 W.
• Versatile Phase Management: Supports switching of various phases across different channels.
• SELV Compliance: Compatible with SELV circuits provided all switching channels operate at SELV levels.

Technical Specifications

Specification	Value
Operating voltage KNX	Bus voltage, ≤12 mA
Operating voltage	110 V AC – 240 V AC, 50 Hz – 60 Hz
Frequency	50 – 60 Hz
Voltage output	24 V AC – 240 V AC
Frequency output	50 – 60 Hz
Stand-by consumption	~0.5 W
Number of channels	12
Max. cable cross section	Solid wire: 0.5 mm² (Ø 0.8) to 6 mm² | Stranded wire with end sleeve: 0.5 mm² to 4 mm²
Output	Triac, 0.45 A
Information Notice EU Data Act	PDF
CE declaration of conformity	PDF
Data sheet	PDF
Width	8
Installation type	DIN rail
Protection class	II according to EN 60 669
Type of connection	Terminal screws | Bus connection: KNX bus terminal
Switching output	Not potential-free
Suitable for SELV	Yes if all channels switch at SELV
Switching of various phases	Possible
Ambient temperature	-5°C … 45°C

Applications

• Individual room temperature control in commercial office complexes, hospitality facilities, and residential KNX projects.
• Control of 24 V AC to 240 V AC thermal actuators in underfloor heating manifolds and cooling system distribution setups.

Installation Notes

• Mount the unit onto an 8-module wide DIN rail in a suitable distribution panel.
• Connect the standard KNX bus line using the provided KNX bus terminal.
• Ensure solid wiring cross sections are between 0.5 mm² and 6 mm², or 0.5 mm² to 4 mm² for stranded wire with end sleeves.
• Verify that switching outputs are non-potential-free prior to connecting external power feeds.

Developer Resources

• Official Data Sheet (PDF) available for comprehensive electrical configuration.
• CE Declaration of Conformity (PDF) for project compliance.
• Information Notice EU Data Act (PDF) for regulatory documentation.

FAQ

What is the operating voltage requirement for the theben HM 12 T KNX?

The actuator operates on KNX bus voltage (≤12 mA) and requires a main operating voltage of 110 V AC to 240 V AC at 50 Hz to 60 Hz. Explore more theben KNX products for professional building automation projects.

How many thermal actuators can the theben HM 12 T KNX control?

It provides 12 channels designed to control 12 thermal actuators (24 V – 240 V AC) structured into 4 groups with 3 outputs each. For certificates and current technical files, refer to the official theben documentation.

Does the HM 12 T KNX include built-in temperature controllers?

Yes, it features integrated P/PI temperature controllers designed for both heating and cooling applications.

Are the switching outputs potential-free?

No, the switching outputs are not potential-free.

What is the exact product model?

The order/model code for this page is 4940245. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by theben.

Conclusion

The theben HM 12 T KNX (4940245) is a versatile and effective solution for multi-zone heating and cooling control in KNX smart building installations. With 12 Triac outputs, built-in P/PI temperature controllers, and low stand-by power draw, it ensures reliable climate control for modern automation systems. Installers and system integrators can review our become a KNX dealer options.