Siemens SIMATIC NET PROFIBUS General, Storage and Transportation, Temperatures, Tensile Strength

Installing LAN Cables

C.7 Installing LAN Cables

C.7.1 Instructions for Installing Electrical and Optical LAN cables

General

During installation, remember that LAN cables can only be subjected to a certain amount of mechanical strain. Cables can be damaged or even destroyed by too much tensile stress or pressure, by torsion or by bending them too sharply. The following instructions will help you to avoid damage when installing LAN cables.

If cables are subjected to strain or stress as listed above, they should always be replaced.

Storage and Transportation

During storage, transportation and cabling, the open ends of the LAN cable (without connectors) must be kept closed with a shrink-on cover to prevent oxidation of the cores and to keep dampness out of the cable.

Temperatures

During transportation, cabling and operation, the cable must not be exposed to temperatures below the specified minimum temperature or above the specified maximum temperature otherwise the electrical and mechanical characteristics of the cables can deteriorate. The permitted temperature ranges of your LAN cable can be found in the technical data sheets of the LAN cables in Chapter 4.

Tensile Strength

The tensile force exerted on the cables during or after installation must not exceed the limits of tensile strength of the cables. The permitted tensile strain on your LAN cable can be found in the technical data sheets of the LAN cables in Chapter 4.

Pull Cables Using Cable Grips and Protect Connectors

To pull cables, make sure that you use cable grips. Before fitting the cable grip, make sure that the connectors of preassembled cables are protected from the pressure exerted by the cable grip, for example using a piece of protective tube.

PROFIBUS Networks SIMATIC NET	C-21
6GK1970-5CA20-0AA1 Release 2 05/2000