GATE Study Material Ethernet (Instrumentation Engineering)

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A thorough analysis of the gaps shows that still most of the structure is relevant. Only some extensions have to be added. The details of the topology extensions you find described in chapter 2.1.
1.4.2 Components The passive components, regarding their communication performance, are well described in the generic cabling standards. But the components designed for office use will not stand long in the rude environment of production machines. They have to be protected by housings or they have to protect themselves. Therefore two classes of environmental protection have been identified and distinguished for installation areas of industrial communication systems 1 Light Duty the area inside of installation cabinets and 2 Heavy Duty the area in the polluted working area of production facilities. Polluted means dirt, liquids, chemicals, EMC, ...
The classes are relevant for the passive as well as for the active components, as they have to work together in the same areas. The Light Duty class is for an already protected area, but must be distinguished from the better protected office environment. The installation cabinet may be mounted on or near moving machine parts, therefore has to withstand mechanical forces. The temperature range can be higher than in typical offices. Only dust and moisture are kept away from the components during operation. The environmental protection classes are specified in more detail in chapter 2.1.7. There surely are more than the two sets of requirements for other areas where industrial IT cabling has to be installed. But the two classes should support most of the installations. For the others, additional or extended requirements will take effect and must be added in the single cases.
IAONA
IAONA Planning and Installation Guide, Release 4.0
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2 System planning 2.1 Topology 2.1.1 Conformance with and difference to existing standards Studies showed that the structured topology described in EN 50173 and ISO IEC 11801 can almost completely be projected to industrial plants, only minor modifications have to be considered. One is the expression floor distributor which is no longer applicable to e.g. a fabrication hall with one floor extending over several hundreds of meters in length. It is proposed to use the term machine distributor instead, because on shop floors, those devices will normally serve a production unit within a radius of about 30 m. The functionality, though, is exactly the same as for the known floor distributor. The logical tree structure shown in Figure 1.1 can also be applied to industrial plants. Figure 2.1 shows an example for a fabrication hall. The campus cabling is completely covered by the named standards. The building distributor of the fabrication hall serves several machine distributors. If there is an office room inside the hall, it will contain a floor distributor with the standard office horizontal cabling to terminal outlets in the wall. In the production units, the more stringent environment protection classes defined in chapter 2.1.7 come into effect. The selection of the passive and active components should be according to the recommendations given in sections 2.4 and 2.5, respectively.
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