Wired operation of electric Velux plus electric external blind?

[Alan Ambrose]

Anyone have a schematic or a simple explanation of how to wire an electric Velux plus electric external blind? I really want a wired set-up and no RF or batteries or remotes and preferably 24V. Are these 24V internally with a 240V transformer on-board? Is it possible to wire only for 24V operation? Yeah, eventually for Home Assistant software or similar. Something like a 6-wire set-up (i.e. 2 off open and close) to some relays?

Edited November 26 by Alan Ambrose

[Nickfromwales]

1 hour ago, Alan Ambrose said:

Anyone have a schematic or a simple explanation of how to wire an electric Velux plus electric external blind? I really want a wired set-up and no RF or batteries or remotes and preferably 24V. Are these 24V internally with a 240V transformer on-board? Is it possible to wire only for 24V operation? Yeah, eventually for Home Assistant software or similar. Something like a 6-wire set-up (i.e. 2 off open and close) to some relays?

The rf controls are plug and play, with the windows addressable to open / close etc in tandem (or more) at the press of one button.

 

Not seen 24v options but I’ve not seen every model / iteration.

 

Velux tech should be able to give you concise information regarding which models / units can be manipulated the way you want them to be. Lots of options, so it may be advantageous to better understand what’s available so you can get the best results. 

[Super_Paulie]

i just connected up my velux blackout blinds (internal) at the weekend. They connect to a pre-installed power plug on the side of the integras and its marked as 24v. The window themselves are 240v but that obviously goes to a transformer in the head of the window which you cant see. I didnt see any options to have these controlled "hard-wired" so to speak, and i did look into it at the time as it made more sense from a reliability standpoint. However the remote button has worked fine but i usually just ask google to open them for me.

[Alan Ambrose]

I found a few scraps on info for anyone coming across this thread. Summary is that you can control either by linking up via Velux's propriety RF interface e.g.

 

+ Documentation - Velux | Loxone

+ Velux - Home Assistant

 

Yuk. The more grown-up solution is via a custom PCB:

 

+ Controlling Velux windows | SmartHome.Exposed

+ Module VNX-A for interfacing VELUX® KMG100 window actuator drive

 

 

 

Curiously, Google AI thinks this (which seems to be nonsense unless this is maybe for some non-retail Velux products):

 

VELUX 24V control systems are Open System solutions for controlling electric windows, blinds, and vents via a ±24V DC signal, allowing integration into building management systems. This is different from the company's proprietary io-homecontrol system and is often used in commercial applications or with smart home systems that support this voltage. You typically need a compatible building management system and hardware like relays to control the devices. 
 

How it works
 

Voltage: The system uses a low-voltage ±24V DC supply, which is a standard in building automation.
Control signal: You send a polarity-based signal (positive or negative) to open or close the window or blind.
Integration: This allows you to integrate VELUX products into your preferred smart home or building management system (BMS).
Hardware: A building management system can control the devices through hardware with relays that switch the 24V DC signal. Devices like the Velux KLF 050 or KLF 200 interface can also be used for this purpose, or you can use a system like Loxone with appropriate relay extensions. 
 

Key components
 

VELUX products: This includes electric or solar-powered windows, blinds, and ventilation modules equipped with a 24V actuator.
Control unit: A building management system or a specific interface (like the Velux KLF series or a Cartelectronic interface) that sends the 24V DC commands.
Power supply: A 24V DC power supply for the actuators and control system.
Relays: In many cases, a relay is needed to switch the 24V DC polarity to control the motor. 
 

Example scenario
 

A smart home system (like Loxone) is connected to VELUX windows via a relay.
The system sends a signal to the relay, which then applies a 24V DC current to the window's actuator, opening or closing it based on the polarity.
This allows for automated control of windows based on time, temperature, or other inputs within the smart home setup.