theben JM 8 T 24V KNX 8-Way Blind Actuator

Description

Introduction

The theben JM 8 T 24V KNX (Item no.: 4940265) is an 8-channel blind actuator from the FIX2 series designed for controlling 24V motorized drives. It offers centralized automated management of window blinds, shutters, sun and vision protection equipment, skylights, and ventilation flaps in KNX-controlled building automation installations. This device is part of our KNX system devices range.

Operating on an AC voltage range of 110 V to 240 V AC at 50–60 Hz alongside the KNX bus connection (~4 mA), this unit features direct manual operation on the device itself—allowing installation testing and drive operation even without an active KNX bus connection. With low standby power consumption (~0.5 W) and DIN rail mounting across 8 module widths, it provides an efficient control solution for low-voltage motor drives.

Key Features

• 8-way FIX2 blind actuator dedicated to 24V motor drives.
• Operating voltage range of 110 V AC – 240 V AC (50 – 60 Hz).
• KNX bus connection powered directly by bus voltage (~4 mA consumption).
• Changeover contact switching outputs rated for 6 A at 24 V DC.
• Manual control buttons on the physical device interface.
• DIN rail installation with an overall width of 8 module units.
• IP 20 protection rating and Class II protection according to EN 60 730-1.
• Designed for operating ambient temperatures between -5°C and 45°C.

Benefits

• Versatile 24V Drive Control: Manages up to 8 independent 24V motorized drives for blinds, shutters, skylights, and ventilation flaps within a single module.
• Bus-Independent Manual Testing: Direct manual control on the front panel allows full manual testing and operation without needing an active KNX bus connection.
• Low Standby Energy Draw: Optimized energy management maintains standby power consumption at approximately 0.5 W.
• Wide Terminal Wire Compatibility: Supports solid conductors from 0.5 mm² to 6 mm² and stranded wire with sleeves from 0.5 mm² to 4 mm².
• SELV Compliant Switching: Potential-free changeover outputs rated at 6 A (24 V DC) allow safe control of low-voltage SELV systems.

Technical Specifications

Specification	Value
Operating voltage KNX	Bus voltage, ~4 mA
Operating voltage	110 V AC – 240 V AC, 50 Hz – 60 Hz
Frequency	50 – 60 Hz
Stand-by consumption	~0.5 W
Number of channels	8
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	Changeover contact, 6 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 60 730-1
Type of connection	Terminal screws | Bus connection: KNX bus terminal
Switching capacity	6 A at 24 V DC
Switching output	Potential-free, for SELV, if the whole device switches SELV
Ambient temperature	-5°C … 45°C
Operating instructions	PDF
Type of protection	IP 20
Hand book	ZIP

Applications

• Automated Motorized Shading: Controls 24V DC Venetian blinds, roller shutters, and sun/vision protection louvers across commercial and residential buildings.
• Skylight & Ventilation Control: Interfaces with 24V actuator mechanisms for roof skylights and ventilation flaps within integrated KNX climate control systems.

Installation Notes

• Mount on a standard DIN rail in a dry indoor electrical distribution box providing IP 20 protection.
• Connect the KNX bus line using standard KNX bus terminals; execute power and drive output connections via terminal screws accommodating up to 6 mm² solid or 4 mm² stranded conductors.
• Ensure total device configuration meets SELV criteria when connecting low-voltage potential-free switching circuits.

Developer Resources

• Technical Data Sheet (PDF), Operating Instructions (PDF), Product Handbook (ZIP), CE Declaration of Conformity (PDF), and EU Data Act Notice (PDF) are available for engineering and ETS parameter setup.

FAQ

Can the theben JM 8 T 24V KNX actuator be tested without a connected KNX bus line?

Yes, local manual operation on the device is functional even without an active KNX bus connection. Explore more theben automation devices for professional building automation projects.

What type of drives is this actuator designed to control?

It is specifically designed for controlling 24V drives for blinds, shutters, sun protection systems, vision screens, skylights, and ventilation flaps. For certificates and current technical files, refer to the official theben documentation.

What is the channel count and switching contact rating?

The actuator features 8 channels with potential-free changeover contacts rated for 6 A at 24 V DC.

What mounting method and module width does this actuator require?

It mounts on a standard DIN rail and occupies a width of 8 modules.

What is the exact product model?

The order/model code for this page is 4940265. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by theben.

Conclusion

The theben JM 8 T 24V KNX 8-way blind actuator (4940265) provides reliable, energy-efficient automation for 24V motorized shading, skylights, and ventilation flaps. Featuring local manual override, robust SELV-compliant switching outputs, and standard DIN rail installation, it offers system integrators a reliable solution for professional KNX installations. Installers and system integrators can review our become a KNX dealer options.