Wired motion detector for Size 55 frames – indoor

Control many functions and actuators in the Homematic IP wired smart home with the wired wall switch – 2 channels.

Wired Motion detector for size 55 frames – indoor

The switch that detects movement

Your home is your private retreat. That's why you want to be sure - even if you're not there. The wired motion detector lets you do that very inconspicuously. Almost incognito: The detector is mounted in the existing standard frame, looks at first glance like a normal switch and it's only clear what it is upon closer inspection. If desired, it will sound an alarm or turn on your lights when movement is detected. 

Colour variants
white
white
anthracite
anthracite
Smiley

More convenience and security 

When there's movement, the light is switched on depending on the brightness level. On request, an alarm is reported within your security solution. 

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Depending on the brightness level in your room, the light is only switched on when you really need it - for more convenience and energy savings. Integrated into a Homematic IP security solution, the motion detector can also trigger an alarm besides switching on the light.

Rahmen mit Funkwellen und Homematic IP Logo

Easily installed in the existing design

Just integrate the pushbutton into your existing switch series in the Size 55 frame size from leading manufacturers. 

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The button is optimised for easy mounting on flush-mounted boxes via the supplied mounting plate. Removable push-in clamp with spring-loaded terminals facilitates connection to the wired bus.

Handy mit Homematic IP Logo und einem Pluszeichen

Cleverly combined

You can combine Homematic IP wired and wireless devices with each other. 

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In addition to the central Homematic IP wired access point (HmIPW-DRAP) you also require the central Homematic IP access point (HmIP-HAP) for this. More information about advanced routing.

Colour variants
white
white
anthracite
anthracite
Schalter und Person mit Pluszeichen

A motion detector and switch in one 

Control functions and devices in the smart home at the touch of a button, even independently of motion detection.

Kabel

The Homematic IP wired system

The wired system guarantees a reliable power supply to the switch as well as secure communication between the devices through the Homematic IP wired bus. 

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Go here for more information about the wired system and products. 

360 Grad 3D

Our products in a new dimension.

Rotate the product in all directions, zoom in and experience it in three dimensions. This gives you a detailed picture of your favourite products.

Die passende Farbe zu jeder Wandoberfläche - 
Probieren Sie es aus!

Mit unserem Design-Simulator wählen Sie zunächst eine Wandoberfläche aus. Dann lassen Sie sich darauf ein Homematic IP Produkt anzeigen. So sehen Sie auf einen Blick, welche Kombination am besten passt.

Background
concrete
plaster
beige wall paint
blue wall paint
tiles 1
tiles 2
wood
children's room
Color
#ffffff
white
#505050
anthracite

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Control access

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Deter burglars

Homematic IP Alarmsirene außen an Hauswand
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Use the app

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Understand our products

Test
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05. July 2023

Travel with a safe feeling: How to protect your home with smart home technology

No one there to look after the house during the holidays? No problem, because your Smart Home protects itself: It keeps burglars away and lets you know immediately if something should happen.

Find out more

Homematic IP: Smart living. Simply exciting.

Homematic IP means modern, flexible and secure technology from the European market leader*. Let the advantages of our system win you over, and start living smarter straight away. 

Homematic IP
With some smart home providers, you have to make a choice: Do you have everything wired, or do you go fully wireless? Some systems are also hermetically sealed and do not accept devices from other manufacturers. Here at Homematic IP, we have a different approach. We are guided by you!
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The Homematic IP app

Configure all settings for your smart home in the Homematic IP app, which you can use to control, regulate and monitor your devices at any time. No personal data is collected except for the IP address.

Homematic IP Wired
A smart home system is particularly robust, interference-proof and reliable when the devices communicate with each other via wired connections. And data transmission is very fast with cables, too. That all comes together with Homematic IP Wired.
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Always here for you and your queries.

Whether you have a question about a product, something isn’t working as you wanted, you’re looking for a specialist partner, or you simply want to give us feedback: we are always here to help.

FAQ

FAQs

This is where you’ll find the most important questions and our answers about our smart home solutions.

Service

Service

Have you purchased a Homematic IP product and now have questions about how it works? Our technical support team will be happy to help you.

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Specialist tradespeople

Are you looking for a good specialist tradesperson near you? Simply use the convenient search function here on our website.

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Dealers

You can get Homematic IP products and good advice all over Germany. Find the right dealer near you here.

Innovations, ideas, impulses: your news

Get first-hand news about the latest innovative smart home solutions. 

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eQ-3 presents a comprehensively expanded portfolio
eQ-3 will be presenting the upcoming highlights of its Homematic IP smart home system at Light + Building 2026The company is expanding its product range with a fully integrated alarm system, introducing a smart solution for protection against water damage and adding intelligent lighting solutions, control elements and other automation components to its range.
08. March 2026
Product Variants

Wired Motion detector for size 55 frames – indoor

Order information

Product Name (Short)
HmIPW-SMI55
Item Number
153751A0
EAN Code
4047976517695

Technical data

Supply voltage
24 VDC, +5 % -20 %, SELV
Current consumption
5 mA max.
Power consumption in standby
60 mW
Degree of protection
IP20
Ambient temperature
-5 to +40 °C
Dimensions with frame (W x H x D)
86 x 86 x 40 mm
Dimensions without frame (W x H x D)
71 x 71 x 40 mm
Weight
75 g
Detection range
12 m
Detection angle
120°
Detection angle vertical
-10° to +25°
Function type
Motion / presence detector
Connection
Wired
Color
white
Installation
Only in normal commercial switch boxes (device boxes) in accordance with DIN 49073-1.
Homematic IP User Guide

Version: July 2025

20.99 MB
Overview of QR code stickers
1.46 MB
Operating manual Wired motion detector for Size 55 frames – indoor

Short description: HmIPW-SMI55 | Product reference: 153751A0

3.47 MB
Data sheet Wired Motion Detector for 55mm frames – indoor

Short description: HmIPW-SMI55 / HmIPW-SMI55-A | Product reference: 153751A0 / 159917A0

1.24 MB
Declaration of conformity Wired Motion Detector for 55mm frames – indoor

Short description: HmIPW-SMI55 | Product reference: 153751AxB

128.18 KB