![]() ![]() The connector shall be suitable for the used fibre. length is 24 m based on the standard power source. length is 10,000 m and for plastic 980/1000 µm fibres the max. length is 1,700 m, for monomode 9/125 µm fibres the max. For multimode 62.5/125 µm fibres the max. 2000ĥ Installation Guideline Installation of Profibus DP Fibre optic The max length of one fibre optic line depends on the fibre specification. segment length m Fieldbus cat./ KERPENWERK GmbH & Co. Therefore it is necessary to follow the IEC or the relevant national standards. ![]() Special care should be taken into account when RS 485 should be intrinsically safe. To eliminate a screen current as result of different earth potential, it is necessary to follow a safe grounding concept. To get the best screening efficiency it is necessary to connect the screen on both ends of the cable. It is important that at each end of the segment a bus termination is made to reduce reflections. The screen should have contact with the whole cross section to the metallic housing and optional to pin 1 of the 9 pin d-sub connector respectively pin 5 of the M 12 connector. If a M12 connector (IP 67) shall be used, the green wire (A) shall be connected on pin 2, the red wire (B) shall be connected with pin 4. If a 9-pin D-sub connector (IP 20) shall be used, the green wire (A) shall be connected on pin 8, the red wire (B) shall be connected with pin 3. The green coloured wire is defined as data wire A, the red coloured wire is defined as data wire B. The maximum segment length with this cable type is given in the right hand mentioned table. Installation of Profibus DP RS485 For new installations it is recommended to use cable type A. For process automation it is recommended to use the Profibus PA, which has the possibility to work as an intrinsically bus system. As a result of these aspects you will get the recommendation for Profibus DP in fibre optic technology or RS 485 (copper technology). The second point of interest is concerning the national regulations for building up electrical systems. It is necessary to look for the conditions of electromagnetic interference, mechanical stress, chemical substances or hazardous applications. So the environmental conditions are the key to chose the optimised applicable product. 2000Ĥ Installation Guideline Environmental aspects and National regulations Besides the special aspects of new technologies, like Profibus systems, we have to consider the same ambient influences as for the traditional electrical installations. Based on the products within this catalogue we specialise to meet every client s requirement based on heavy duty environmental conditions or other critical applications. As an alternative to the standard Profibus cables, we give you the opportunity to reduce the installation costs by using our Fast AssemblyTM product with a special stripping tool. This is the way to follow the philosophy of Plug and Play. The cables are consistent to the connectors and plugs defined for the bus system. The cable types in this catalogue are always based on the type A cable of the relevant standards which indicates almost the best quality. Today Profibus and Fieldbus Foundation were implemented in the international fieldbus which was finished in Internet OS OS Profibus on Ethernet TCP/IP IPC Profibus DP Manufacturing Profibus PA Process Our Products The cable products are based on the standards EN and IEC This guarantees that our products can be used for the 3 most important fieldbus solutions in the world, Profibus, Fieldbus Foundation and World FIP. Within these groups, where each manufacturer could be a member, standards were worked out for fieldbus solutions, which had become a national standard in respect of Profibus. As a result of these, and the need of the market manufacturer independent user organisations were build up. To develop an international standard within the SP 50 working group, different interests of the members made it really difficult to proceed with the specification. Depending on many different special applications there arose a lot of manufacturer s special bus solutions. The mystery word was "Fieldbus Technology". 3 Introduction In industrial applications there has been a change of data transmission in the last 10 years. ![]()
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