Local Control Network
A Local Control Network (abbreviated LCN ) is a proprietary building automation system for residential and functional buildings that was developed by the German hardware and software company Issendorff KG, based in Rethen (Leine) . It was first presented at the industrial fair in Hanover in 1992 and has been in series production since 1993.
concept
The system consists of a decentralized network , which is formed by microcomputers , the LCN modules and a four-wire bus . All available LCN modules have the same hardware and software and can therefore be programmed identically. All modules can be read back, which is difficult or impossible with other systems. LCN modules are also compatible with older ones, so that an extension of a system from 1997 with current modules would be possible.
The modules are available in various designs that are adapted to use in distribution , in flush-mounted boxes or in junction boxes. The modules have two independently controllable, dimmable outputs. They can also be supplemented with sensors, buttons, actuators, couplers, etc. Each module can be both a sensor and an actuator.
The simple programming and installation as well as the costs for the parameterization software (no dongle required) are the advantages over other systems on the market.
communication
In addition to protective, phase and neutral conductors, the individual LCN modules are also connected to a fourth conductor for data transmission. Communication takes place via the data wire and the neutral conductor.
Bus structure
The bus can be structured in a line, star or tree shape. A maximum of 250 modules can be accommodated in a bus segment. Bus segments can be combined on a higher level that can contain a maximum of 120 segments. An LCN system can therefore contain a maximum of 30,000 modules.
Programming (software)
LCN is programmed by a qualified electrician using the LCN programming software LCN-PRO, which is installed on a PC or laptop. The PC can be connected to any point in the LCN network via an LCN coupler. The LCN-PKE bus coupler has been available since 2018 and allows connection to LAN or WLAN, so that no computer has to be set up directly at the coupling point.
Remote control and visualization
LCN-GVS is installed on a Windows PC and serves as a central web server for your LCN buildings worldwide. Any number of users can visualize and control using a web browser - a special program is not required on the visualization stations (PCs, Macs or smartphones). An iOS and Android app LCN-GVS for remote control of the building technology has been available since June 2013. Since 2018 there has been a second app that allows LCN remote control via Siri.
The big advantage of the software is its simplicity. Installers and end customers alike can design the panels.
Third-party solutions
OpenHAB or IP-Symcon offer a universal solution . Both providers enable devices from all well-known manufacturers to be controlled by one another.
The company L-Vis offers a small visualization and remote control via a web interface that can also be operated from an iPad or a mobile phone. The connection to the LCN system takes place via the L-Vis Box manufactured by the company , which is inserted as a gateway between an LCN coupler and an Internet router. The L-Vis Box allows the remote control of any number of modules within a segment.
The company IOS Mediensysteme offers visualization with touch-sensitive graphics-capable displays, which are mainly used in connection with audio systems.
The company ReCon Systemmanagement offers HTML-based visualization for every browser-enabled device. The I-Port protocol provided internally by LCN and the PCHK protocol with the USB <> PCHK interface serve as the interface.
See also
Web links
- LCN in Germany Homepage of the manufacturing company Issendorff