Instabus
Encyclopedia
Instabus, is a decentralized open system to manage and control electrical devices within a facility. It is developed by Berker, Gira, Jung, Merten and Siemens AG
Siemens AG
Siemens AG is a German multinational conglomerate company headquartered in Munich, Germany. It is the largest Europe-based electronics and electrical engineering company....

. There are about 200 companies of electrical supplies using this communication protocol. The EIB (European Installation Bus) allows all electrical components to be interconnected through an electrical bus
Electrical bus
Electric bus is a bus powered by electric energy. "Electric bus" can also refer to:* Bus , used for connecting components of a computer or communication between computers* Busbars, thick conductors acting as nodes in electrical substations...

. Every component is able to send commands to other components, no matter where they are. A typical EIB network is made of electrical components such as switches, pulsers, electric motor
Electric motor
An electric motor converts electrical energy into mechanical energy.Most electric motors operate through the interaction of magnetic fields and current-carrying conductors to generate force...

s, electrovalves, contactors, and sensors.

This electrical bus is made of a 2x2x0,8mm twisted pair
Twisted pair
Twisted pair cabling is a type of wiring in which two conductors are twisted together for the purposes of canceling out electromagnetic interference from external sources; for instance, electromagnetic radiation from unshielded twisted pair cables, and crosstalk between neighboring pairs...

 cable, that connects all devices within the network. The theoretical maximum number of components is 57375.

EIB system was developed to increase power savings, security, comfort and flexibility.

System control

Although the EIB is a decentralized system and doesn't need any electric switchboard
Electric switchboard
An electric switchboard is a device that directs electricity from one source to another. It is an assembly of panels, each of which contains switches that allow electricity to be redirected. The U.S...

 or control console, it's possible to implement a PC based monitoring system to check device status and to send manual or pre-programmed commands to one or more components of the network.

Covergence with other standards

The Konnex KNX (standard)
KNX (standard)
KNX is a standardized , OSI-based network communications protocol for intelligent buildings. KNX is the successor to, and convergence of, three previous standards: the European Home Systems Protocol , BatiBUS, and the European Installation Bus...

was developed as a result of the convergence between EIB, BCi and EHSA.
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