BS/EN 50173-6-2018 pdf download.Information technology-Generic cabling systems Part 6 : Distributed building services.
5.2 Environmental performance
The transmission performance of 5.3 shall be achieved following consideration of the relevant environmental Class of EN 50173-1:2018, 5.1.
5.3 Transmission performance
5.3.1 General
The channel transmission performance specifications allow for the transmission of the applications in EN 50173-1:2018, Annex F.
The channel performance requirements described in this dause shall be used for the design and can be used for verification of any implementation of this European Standard, using the test methods defined, or referred to, by this clause. In addition, these requirements can be used for application development and troubleshooting.
The channel specifications in this clause allow for the transmission of defined Classes of applications over distances other than those of Clause 6, and/or using media and components with different transmission performance than those of Clause 7, Clause 8 and Clause 9.
Link performance requirements are specified in Annex A.
5.3.2 Balanced cabling
5.3.2.1 Service distribution cabling (Type A generic cabling)
Service distribution cabling shall provide a channel performance as required from Classes EA to FA as specified in EN 50173-1:2018, taking into consideration the requirements for application support over the lifetime of the cabling.
In the case of cable sharing, additional requirements shall be taken into account for balanced cabling. The additional crosstalk requirements are specified in 7.2.
5.3.2.2 Service distribution cabling (Type B generic cabling)
Service distribution cabling shall provide link performance as required from Classes EA to F as specified in Annex A with appropriate connecting hardware, meeting the requirements of Clause 8, at the SD and SCP.
In the case of cable sharing, additional requirements shall be taken into account for balanced cabling. The additional crosstalk requirements are specified in 7.2.
Annex D describes the implementation of optical fibre within the service distribution cabling.
The selection of optical fibre components shall take into account the applications to be supported, and the required channel lengths. and should take into account any predicted changes to the applications to be supported during the expected life of the cabling.
Cabling shall use the cabled optical fibre cable Categories referenced in 7.3 to provide channel performance as required to support the relevant set of applications (see EN 50173-1:2018, Annex F) for the following parameters:
a) channel attenuation:
b) channel length.
Channel performance shall meet the requirements of EN 50173-1:2018, 5.2.4.
5.3.3.2 Service distribution cabling (Type A generic cabling)
Type A generic cabling implemented using optical fibre cabling does not support remote powering.
5.3.3.3 Service distribution cabling (Type B generic cabling)
See Annex 0.
5.3.3.4 Backbone cabling
See 5.3.3.1.
6 Reference implementations for distributed building services
6.1 General
Clause 6 describes implementations of generic cabling that utilize components referenced in Clause 7, Clause 8 and Clause 9. These reference implementations meet the requirements of Clause 4 and, when installed in accordance with EN 50174 series of standards, comply with the channel performance requirements of 5.3, when subjected to the relevant environmental classifications of 5.2.
Compatibility between cabling components shall be ensured by design and in accordance with EN 50174-1 in order to maintain the required environmental performance at interfaces of cabling components.
6.2 Balanced cabling
6.2.1 General
Balanced cabling components referenced in Clause 7, Clause 8 and 9.2 are defined in terms of Category. In the reference implementations of this clause, the components used in each cabling channel shall have the same nominal characteristic impedance in accordance with EN 50173-12018, 7.3.
to the effect of ambient temperature and/or the impact of applications supported by the cabling):
a) cables can be specified with lower insertion loss specifications than those detailed in this clause and/or;
b) appropriate conditions can be provided to reduce the operating temperature of the channel (EN 501 74-2 provides requirements and recommendations for installation planning and practice to support remote powering applications).
Cables and connections of different Categories can be mixed within a channel however the resultant cabling performance will be determined by the Category of the lowest performing component.
6.22 Service distribution cabling (Type A generic cabling)
6.2.2.1 Component choice
The selection of balanced cabling components will be determined by the Class of applications to be supported by the cabling. Refer to EN 50173-1:2018. Annex F, for guidance.
Using the models of 6.2.2.2:
a) Category 6A or Category 8.1 components provide Class EA balanced cabling performance;
b) Category 7 components provide Class F balanced cabling performance;
C) Category 7A or Category 8.2 components provide Class FA balanced cabling performance.
NOTE Category 8.1 components cannot be used to provide a Class F or FA balanced cabling channel.
6.2.2.2 Dimensions
Figure 16 shows the models used to correlate service distribution cabling dimensions specified in this clause with the channel specifications in Clause 5.
Figure 1 6a) shows a channel containing only an interconnect and an SO. Figure 1 6b) contains an additional connection as a cross-connect. In both cases the fixed service distribution cable connects the SD to the SO. The channel includes cords comprising patch. equipment and service area cords. For the purposes of this subclause, jumpers used in place of patch cords are treated as cords.
Figure 16c) shows a channel containing an interconnect, an SCP and an SO. Figure 16d) contains an additional connection as a cross-connect. In both cases the fixed service distribution cable connects the SD to the SCP. The channel includes cords comprising patch, equipment and service area cords. For the purposes of this subclause, jumpers used in place of patch cords are treated as cords.
In addition to the cords, the channels shown in Figure 16c) and Figure 16d) contain an SCP cable. The insertion loss specification for the SCP cable can differ from that of both the fixed service distribution cable and the flexible cables. The channel of Figure 16d) is recognized as the maximum implementation used to define the channel performance limits of Clause 5.BS/EN 50173-6-2018 pdf download.