Akubela KXAC-B1C4 4-Channel KNX Curtain Module for DIN Rail Installation

Akubela KXAC-B1C4 4-Channel KNX Curtain Module

The Akubela KXAC-B1C4 is a DIN rail mounted KNX actuator built to control up to four independent curtain, blind or roller shutter motors from a single compact unit. Powered directly from the KNX bus, it lets integrators add motorised window covering control to a building without running extra low-voltage wiring, and it fits neatly alongside other Akubela KNX add-on modules in a standard distribution board.

Key Features

• Four independent channels for curtain, blind or shutter motors, each wired and addressed separately
• Bus-powered operation from a 21-30VDC KNX line, removing the need for a dedicated auxiliary supply
• Rated switching capacity of 250V/440VAC with a maximum load of 2300W per channel for reliable motor control
• Manual open/close override alongside scheduled and scene-based automation via ETS programming
• Delayed timing functions for staggered or sequenced curtain movement
• Real-time status feedback so the position of each curtain can be monitored from a KNX panel or app
• Bus voltage monitoring and output signal inversion for flexible commissioning
• Compact 72 x 90 x 64mm housing for standard 35mm DIN rail mounting inside switchboards or cavities
• CE certified for EMC and low voltage compliance, built to the EN50090-2-2 KNX standard

Typical Applications

This module suits residential and light commercial KNX installations where multiple windows need coordinated shading control, such as apartments, offices and villas fitted with electric curtain tracks or roller blind motors. Because it handles four channels in one device, it is a space-efficient option for consolidating shading control in a switchboard rather than installing several single or dual-channel actuators. It pairs naturally with Akubela KNX scene panels, touch switches and the HyPanel range to trigger whole-room or whole-floor shading scenes.

What's in the Box

• 1 x Akubela KXAC-B1C4 4-channel KNX curtain module
• DIN rail mounting clips (integrated)
• Terminal connectors for KNX bus and motor wiring
• Quick installation reference

Frequently Asked Questions

Does the KXAC-B1C4 need a separate power supply?
No. The module draws its operating power directly from the KNX bus, so no additional low-voltage supply is required for the control electronics, though the motor loads themselves are switched at mains voltage.

Can each channel be programmed independently?
Yes. Each of the four channels can be configured separately in ETS, allowing different curtains or blinds to run on their own schedules, scenes or manual controls.

What size motor loads can it handle?
Each channel supports resistive and capacitive loads up to 10A/230V, with a maximum load limit of 2300W per channel, which covers the vast majority of residential and commercial curtain and blind motors.

Where should this module be installed?
It is designed for DIN rail mounting inside a switchboard, ceiling void or dedicated automation enclosure, keeping wiring tidy and centralised away from the curtain motors themselves.