Contact interface

Make glass breakage detectors and magnetic contacts smart and detect glass breakage of your windows or doors in the app - with the Homematic IP contact interface.

Contact interface

The smart way to monitor window glass

You want to know that your home's secure - whether you're at home or out and about. You can do this when you're in by monitoring your windows and doors with glass breakage detectors or magnetic contacts. Unfortunately though most of them aren't smart, and if you're out you'll be lucky to find out about glass being broken by a burglar, for example. With the contact interface of Homematic IP, you can retrofit a smart function into your windows and doors so that you'll always be aware of their status. 

Haus mit Schutzschild

Monitoring for a secure home

Broken window and door glass is detected immediately and displayed in the Homematic IP app. 

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Combine this with a IP alarm sirene (e.g. HmIP-ASIR-O) to make your home even more secure. A loud alarm is triggered when glass breakage is detected.

Haken mit Funkwellen

Flexible installation

Connect the contact interface to a conventional wired glass breakage detector or magnetic contact and place the interface anywhere inside the room. 

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Radio communication and battery operation allow you to flexibly and easily mount the device on a wall or on a window or door frame. The relevant installation material is included.

Zahnräder mit Haken

Reliable operation

The contact interface runs autonomously without the connection to the power supply.  

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This is made possible by battery operation with a service life of up to 4 years.

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

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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

Order information

Product Name (Short)
HmIP-SCI
Item Number
153149A0
EAN Code
4047976531493

Technical data

Supply voltage
2x 1.5 V LR03/micro/AAA
Typical battery life
4 years (typical)
Degree of protection
IP20
Dimensions (W x H x D)
26 x 100 x 17 mm
Ambient temperature
5 to 35 °C
Weight
30 g (including batteries)
Radio frequency
868.0-868.6 MHz/869.4-869.65 MHz
Typ. open area RF range
330 m
Function type
Input
Connection
Wireless
Color
white
Homematic IP User Guide

Version: July 2025

20.99 MB
Overview of Homematic IP QR Code Stickers
50.09 KB
Data sheet Contact Interface

Short description: HmIP-SCI | Product reference: 153149A0

260.73 KB
Declaration of conformity Contact Interface

Short description: HmIP-SCI | Product reference: 153149AxC

126.56 KB