Updated: 07.11.2026
In brief: You can control several roller shutters centrally either by radio – a multi-channel transmitter moves groups or all shutters – or by cable via a group control with isolating relays. Motors with mechanical end positions must not simply be connected in parallel to one switch.
Three solutions
| Solution | Effort | Suitable for |
|---|---|---|
| Radio motors + multi-channel transmitter | low, no new cables | Flat, house, retrofit |
| Cable motors + isolating relay / group control | medium, control cables needed | New build, fixed groups |
| Radio motor with RS485 / dry contact | Integration into building management | Office, commercial, many windows |
Why not simply in parallel?
When one motor reaches its end position it switches off – but via the shared switch line the second motor can feed voltage back into the other direction. This leads to malfunctions and damage. An isolating relay decouples the motors.
Suitable motors
- A-OK AM45 radio – Gruppen per Handsender, dazu RS485 und Trockenkontakt, ab 100 €
- A-OK AM45 mechanical – for cable control with isolating relays, from €65
- A-OK AM55 – for external venetian blinds, cable or radio, from €97
Group control works similarly for window actuators, see Controlling windows, blinds & roller shutters with 24 V.
Frequently asked questions
How many roller shutters can one transmitter control?
That depends on the transmitter. Multi-channel transmitters are common, where each channel controls one shutter or a group.
Can I control individually and centrally?
Yes. Each shutter has its wall transmitter; in addition a central channel moves all of them together.
Calculate the torque yourself: Roller shutter motor calculator. All guides on roller shutter, awning and external venetian blind motors: Sun protection guide.
Advice on the right motor
Send us the shaft diameter, curtain size and material – we will name the right A-OK motor. Phone 040 50694631 (Mon–Fri 8 am–5 pm) or via the Contact form. All motors at a glance: Sun protection motors.
Technically reviewed by Dietmar Heiken, Sales, Vent Systems HDI GmbH, Hamburg – around 20 years of industry experience. Questions? Phone +49 40 50694631 or info@ventsystems.de
Last updated: 07.11.2026
