30.05.2012

Modern, efficient and safe

The "liveblood" of Stuttgart´s new City Library

Since October 2011 the City of Stuttgart has a new, ultra-modern city library. Generating some of the "lifeblood" of this architecturally striking building are its powerful communications cabling and a reliable fire safety cable system, both of which owe their origins to Datwyler.

In the library visitors have access to multi-media learning facilities with in-house netbooks, in addition to which they are able to access the most modern media via WLAN. Some high-end computer stations even offer the chance to use 3D or virtual reality programs. The physical basis for the large number of communication possibilities offered by the City Library to its visitors is a powerful Datwyler data network using fibre optics (FO) in the riser area and high-quality copper technology at individual floor level. Construction of the communications cabling system was carried out by Siemens Building Technologies based on City planning guidelines.

The server room in the basement was connected with the distributors on the individual floors via buffered fibre optic cables, each with 12 or 24 OM 3 multimode fibres. The required optical fibre pigtails and connection cables were supplied by Datwyler, complete with pre-assembled SC connectors on both sides. On the individual floors the installation engineers laid halogen-free Category 7 type CU 7080 4P cable in flame-retardant construction. Together with the RJ 45 MS-K modules and the corresponding patch panels and data outlets, Siemens laid a Class EAcommunications network up to 500 megahertz capacity which is in line with the current ISO / IEC Standard. 

Overall the teams installed 126 kilometres of copper data cables in Simplex and Duplex construction together with 144 patch panels, each with 24 ports, as well as 6,400 MS-K modules and 3,200 data outlets which are protected by dust covers if not used. In the fibre optic cabling, there are a further 3,200 metres of FO Indoor cable and 33 FO patch panels, each with 12 pre-assembled Duplex connections. 

Today, it is not only the PCs, netbooks, telephones and WLAN access points that are connected to the new network, but also a number of other systems, for example, the VA/PA system, the book cataloguing and book security installations and the electronic book issue and return systems. 

Even where security lighting and the provision of an emergency power supply - both disciplines associated with central building services - are concerned, Siemens have made use of solutions from Datwyler. Here the installation engineers have fitted around 14 kilometres of safety cables, around 1,000 Hermann clamps and single clips as well as innumerable special pins - offering system circuit integrity. All the components have the necessary test certificates. These confirm that entire cable installation can be relied upon to continue to supply the connected safety systems with power for up to 30 / 90 minutes in the event of a fire.