Bsi bs en 50377 14 1 2011

BSI Standards Publication BS EN 50377 14 1 2011 Connector sets and interconnect components to be used in optical fibre communication systems — Product specifications Part 14 1 Cords with IEC 60793 2 5[.]

BS EN 50377-14-1:2011 BSI Standards Publication Connector sets and interconnect components to be used in optical fibre communication systems — Product specifications Part 14-1: Cords with IEC 60793-2-50 singlemode category B1.1 and B1.3 fibre for category C BS EN 50377-14-1:2011 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50377-14-1:2011 BSI, as a member of CEN, is obliged to publish EN 50377-14-1 as a British Standard However, attention is drawn to the fact that the UK committee voted against its approval as a European Standard The UK committee submitted a number of comments at Formal Vote, of principal concern were: • that the purpose of the document needs to be clarified and reconsidered to make it a proper patchcord test regime or alter it so that it becomes a description document that calls up the connector and cable tests • in Annex A, the specification of a reference cord is particularly tight, which may cause unnecessary expense on testing The published optical interface standard (BS EN 61755-1) ensures that there is always fibre to fibre contact at 50 um apex offset (given a set radius and undercut) and so the apex of a reference connector does not need to be tighter than this Also the advice on connector cleaning is contrary to best practice Connectors should be inspected before they are mated – every time not every 50 matings The UK committee is pressing for the document to be taken into immediate maintenance and revised accordingly The UK participation in its preparation was entrusted to Technical Committee GEL/86/2, Fibre optic interconnecting devices and passive components A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © BSI 2011 ISBN 978 580 65411 ICS 33.180.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2011 Amendments issued since publication Date Text affected BS EN 50377-14-1:2011 EUROPEAN STANDARD EN 50377-14-1 NORME EUROPÉENNE EUROPÄISCHE NORM June 2011 ICS 33.180.20 English version Connector sets and interconnect components to be used in optical fibre communication systems Product specifications Part 14-1: Cords with IEC 60793-2-50 singlemode category B1.1 and B1.3 fibre for category C Steckverbindersätze und Verbindungsbauelemente für LichtwellenleiterDatenübertragungssysteme Produktnormen Teil 14-1: Verbindungskabel für Einmodenfasern der Kategorien B1.1 und B1.3 nach EN 60793 50 für die Kategorie C This European Standard was approved by CENELEC on 2011-05-02 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50377-14-1:2011 E BS EN 50377-14-1:2011 EN 50377-14-1:2011 –2– Foreword This European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic interconnect, passive and connectorised components The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50377-14-1 on 2011-05-02 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN and CENELEC shall not be held responsible for identifying any or all such patent rights The following dates were fixed: – – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012-05-02 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-05-02 This document includes the performance of the patch cord, as well as latest attenuation and return loss grades as specified in IEC BS EN 50377-14-1:2011 –3– EN 50377-14-1:2011 Connector sets and interconnect components to be used in optical fibre communication systems – Product specifications Part 14-1: Cords with IEC 60793-2-50 singlemode category B1.1 and B1.3 fibre for category C Description Performance Fibre category: EN 60793-2-50 Types B1.1 and B1.3 Application: For use in EN category C (controlled environment) Cable type: EN 60794-2-50 Type simplex cables Attenuation grades: (random mate) B: ≤ 0,12 dB mean ≤ 0,25 dB for ≥ 97 % of measurements C: ≤ 0,25 dB mean ≤ 0,50 dB for ≥ 97 % of measurements Return loss grade: (random mate) 1: ≥ 60 dB 2: ≥ 45 dB Related documents: EN 50377 series Connector sets and interconnect components to be used in optical fibre communication systems – Product specifications EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for class B single-mode fibres (IEC 60793-2-50) EN 60794-2-50 Optical fibre cables – Part 2-50: Indoor cables – Family specification for simplex and duplex cables for use in terminated cable assemblies (IEC 60794-2-50) EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and measurement procedures (IEC 61300 series) EN 61753-1 Fibre optic interconnecting devices and passive components performance standard – Part 1: General and guidance for performance standards (IEC 61753-1) ETSI TS 100 671 Transmission and Multiplexing (TM); Passive optical components; Optical fibre connectors for single mode optical fibre communication systems; Common requirements and conformance testing Outline and maximum dimensions: Length BS EN 50377-14-1:2011 EN 50377-14-1:2011 –4– Contents 1 Scope 5 2 1.1 Product definition 5 1.2 Intermateability of the plugs 5 1.3 Operating environment 5 1.4 Reliability 5 1.5 Quality assurance 5 Normative references 6 3 Description 6 4 3.1 Plug 7 3.2 Cable 7 3.3 Materials 7 3.4 Marking 7 Variants 8 5 Dimensional requirements 9 6 5.1 Outline dimensions 9 Tests 9 7 6.1 Sample size 9 6.2 Test and measurement methods 9 6.3 Test sequence 9 6.4 Pass/fail criteria 9 Test report 9 8 Product qualification requirements 10 8.1 Dimensional and marking requirements 10 8.2 Optical performance requirements 10 8.3 Mechanical performance requirements 12 8.4 Environmental performance requirements 14 Annex A (informative) Reference connector details 15 Annex B (normative) Tests, sample size and product sourcing requirements 16 Annex C (normative) Cable bend (coiling) test procedure 17 Bibliography 18 Figures Figure – Length of patch cord 9 Figure C.1 – Cable bend (coiling) test set-up 17 Tables Table – Ensured level of random attenuation 5 Table – Connector references 7 Table – Optical performance requirements 11 Table – Mechanical performance requirements 12 Table – Environmental performance requirements 14 Table B.1 – Test, sample size and sourcing 16 BS EN 50377-14-1:2011 –5– EN 50377-14-1:2011 Scope 1.1 Product definition This standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements that an assembled singlemode patch cord with cylindrical ferruled connectors shall meet in order for it to be categorised as an EN standard product Since different variants and grades of performance are permitted, product marking details are given in 3.4 and Clause 1.2 Intermateability of the plugs Although all products conforming to the requirements of this standard will intermate, the resulting level of random attenuation performance will only be ensured in accordance with Table The intention is that this will be true irrespective of the manufacturing source(s) of the product When intermating plug variants having different attenuation grades as specified in EN 61755-1, the resulting level of attenuation cannot be assured to be any better than the worst attenuation grade The intermating of a grade C plug with a grade B plug will result in a grade C level of random attenuation performance Table – Ensured level of random attenuation Plug variant / Attenuation grade Plug Plug C B C C C B C B 1.3 Operating environment The tests selected combined with the severities and durations are representative of an EN 61753-1 category C environment 1.4 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this standard does not guarantee the reliability of the product This should be predicted using a recognised reliability assessment programme 1.5 Quality assurance Compliance with this standard does not guarantee the manufacturing consistency of the product This should be maintained using a recognised quality assurance programme BS EN 50377-14-1:2011 EN 50377-14-1:2011 –6– Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 50377 series Connector sets and interconnect components to be used in optical fibre communication systems – Product specifications EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for class B single-mode fibres (IEC 60793-2-50) EN 60794-2-50 Optical fibre cables – Part 2-50: Indoor cables – Family specification for simplex and duplex cables for use in terminated cable assemblies (IEC 60794-2-50) EN 61300-2-4 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-4: Tests – Fibre/cable retention (IEC 61300-2-4) EN 61300-2-22 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-22: Tests – Change of temperature (IEC 61300-2-22) EN 61300-2-42 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-42: Tests – Static side load for connectors (IEC 61300-2-42) EN 61300-2-44 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic devices (IEC 61300-2-44) EN 61300-3-3 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of changes in attenuation and return loss (IEC 61300-3-3) EN 61300-3-6 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-6: Examinations and measurements – Return loss (IEC 61300-3-6) EN 61300-3-22 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-22: Examinations and measurements – Ferrule compression force (IEC 61300-3-22) EN 61300-3-28 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-28: Examinations and measurements – Transient loss (IEC 61300-3-28) EN 61300-3-34 Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-34: Examinations and measurements – Attenuation of random mated connectors (IEC 61300-3-34) EN 61753-1 Fibre optic interconnecting devices and passive components performance standard – Part 1: General and guidance for performance standards (IEC 61753-1) EN 61755-1 Fibre optic connector optical interfaces – Part 1: Optical interfaces for single mode non-dispersion shifted fibres – General and guidance (IEC 61755-1) Description This document applies to both patch cords and work area cords A patch cord is defined as a short length of cable with connector plugs assembled at both cable ends Typical length (but not limited to) is m to 10 m, measured from tip to tip at the extremes Patch cords are installed in mechanically protected locations (inside cabinets, distribution frames and enclosures) BS EN 50377-14-1:2011 –7– EN 50377-14-1:2011 Work area cords are typically more ruggedized (larger diameter) and used in mechanically less protected locations For the purpose of this document, both patch cords and work area cords are called patch cords 3.1 Plug The plug features a cylindrical ferrule It has a single male key that is used to limit and may be used to orientate, the relative rotation between mated connectors A cover (dust cap) to protect the ferrule end faces when the connectors are in the unmated condition shall be provided The plug shall meet the relevant product specification as listed in Table (most common types are listed) Table – Connector references Connector Reference FC EN 50377-2 series SC EN 50377-4 series SC-RJ EN 50377-6 series LC EN 50377-7 series LSH EN 50377-8 series MU EN 50377-10 series LX.5 EN 50377-13 series 3.2 Cable The cable shall meet the requirements of EN 60794-2-50 3.3 Materials Materials which are not specified or which are not specifically described are left to the discretion of the manufacturer The plug materials shall meet the relevant requirements of the product specifications listed in Table The cable materials shall meet the requirements of EN 60794-2-50 3.4 Marking Marking of the product shall be in the following order of precedence: a) identification of the cable assembly manufacturer; b) manufacturing date code: year/week; c) manufacturers part number; d) variant identification number Provision should be taken to avoid confusion between the original cable marking and the patch cord product information BS EN 50377-14-1:2011 EN 50377-14-1:2011 –8– Variants EN 50377 – 14 – – X1X2X3 – X4X5X6 – XX7 – XX8 Variant No X1 and X4 Connector type S SC F FC E LSH M MU R SC-RJ X LX.5 L LC Variant No X2 and X5 Attenuation grade (EN 61755-1) B B (≤ 0,25 dB) C C (≤ 0,5 dB) Variant No X3 and X6 Return loss grade (EN 61755-1) 1 (≥ 60 dB mated) 2 (≥ 45 dB mated) 3 (≥ 35 dB mated) Variant No XX7 Cable length (in metre) 01 - 99 a Length measured from tip to tip of connectors Remark Tolerances on length a ± 50 mm For lengths longer than 10 m, the tolerance shall be ± 5% Variant No XX8 Cable type (in mm) Structure Note 09 ∅ 0,9 ± 0,1 Buffered fibre fibre 16 ∅ 1,6 ± 0,2 Reinforced cable fibre 18 ∅ 1,8 ± 0,2 Reinforced cable fibre 20 ∅ 2,0 ± 0,2 Reinforced cable fibre 24 ∅ 2,4 ± 0,2 Reinforced cable fibre 28 ∅ 2,8 ± 0,2 Reinforced cable fibre 30 ∅ 3,0 ± 0,2 Reinforced cable fibre BS EN 50377-14-1:2011 –9– EN 50377-14-1:2011 Dimensional requirements 5.1 Outline dimensions Da nie l Da em s Length (Variant XX7) Figure – Length of patch cord Length shall be measured from tip to tip of connectors (see Figure 1) Tests 6.1 Sample size For the purpose of this specification, a sample is defined as a patch cord All samples shall be randomly selected The sample size for each test and product sourcing requirements are given in Annex B The length of the patch cord samples is m 6.2 Test and measurement methods All tests and measurements have been selected from EN 61300 series As stated in the individual test details, all measurements shall be performed at (1 310 ± 30) nm, (1 550 ± 30) nm and (1 625 ± 20) nm No deviation from the specified test method is allowed Attenuation measurement against reference (EN 61300-3-4) is intended for checking quality conformance Random attenuation (EN 61300-3-34) is to be used during qualification to ensure the requirements of the appropriate grade are met 6.3 Test sequence All products shall be subjected to Tests – as specified in Annex B There is no defined sequence in which Tests – must be run 6.4 Pass/fail criteria A product will have met the requirements of this standard provided no failures occur in the sample group for any test In the event of a failure occurring, the failing test shall be repeated using a sample size double that of the original Test report A fully documented test report and supporting data shall be prepared and shall be available for inspection as evidence that the tests described in Clause have been carried out in accordance with this standard BS EN 50377-14-1:2011 EN 50377-14-1:2011 – 10 – Product qualification requirements 8.1 Dimensional and marking requirements Dimensions and marking of the product, including any associated spring force, shall be in accordance with the requirements of the product specifications listed in Table 2, and shall be measured and inspected using the appropriate EN test method End face geometry shall be measured according to the relevant EN test specification and shall meet the requirements stated in the product specifications listed in Table The length of the patch cords shall be measured between the tips of the connector plugs The measured length shall be in accordance with the requirements in Clause (variant XX7) 8.2 Optical performance requirements The connectors used in the patch cord shall meet all requirements as stated in the relevant product specifications listed in Table In addition, the following requirements shall be met for the patch cords (see Table and the list of required tests in Annex B) BS EN 50377-14-1:2011 – 11 – EN 50377-14-1:2011 Table – Optical performance requirements No Test Attenuation a (random mate) Requirement Details Grade C: Method: EN 61300-3-34, Method ≤ 0,25 dB mean ≤ 0,50 dB (for > 97 % of measurements) Source type: LED/LD Peak wavelength: 310 nm ± 30 nm 550 nm ± 30 nm 625 nm ± 20 nm Source stability: < ± 0,01 dB over the measuring period or at least h 20 randomly mated plugs from 10 patch cords For plug/adaptor/plug connector sets, 10 adaptors randomly selected shall be used In total 100 randomly mated connections shall be tested Detector linearity: Within < ± 0,01 dB over the dynamic range to be measured Launch fibre length: > m Only the fundamental mode shall propagate at the connector interface to be tested and at the detector Pre-conditioning procedure: Clean plug and adaptor according to the manufacturer’s instructions Grade 1: > 60 dB Grade 2: > 45 dB Method: EN 61300-3-6, Method Source type: LD Peak wavelengths: 310 nm ± 30 nm 550 nm ± 30 nm 625 nm ± 20 nm Source stability: < ± 0,01 dB over the measuring period or at least h Detector linearity: Within ± 0,01 dB over the dynamic range to be measured Launch conditions: Only the fundamental mode shall propagate at the connector interface to be tested and at the detector Directional coupler type: 50/50 fused Directivity: > 65 dB Launch fibre length from coupler: ≤2m Pre-conditioning procedure: Clean plug and adaptor according to the manufacturer’s instructions Grade B: ≤ 0,12 dB mean ≤ 0,25 dB (for > 97 % of measurements) Return loss (random mate) 20 randomly mated plugs from 10 patch cords For plug/adaptor/plug connector sets, 10 adaptors randomly selected shall be used In total 100 randomly mated connectors shall be tested in a similar procedure as EN 61300-3-34, Method a Attenuation measurement tests against reference connectors (EN 61300-3-4) are intended to be used when quality conformance is required (see definition of reference connector in Annex A) Random mating attenuation test (EN 61300-3-34) shall be used during qualification to ensure that the requirements of the appropriate grade are met BS EN 50377-14-1:2011 EN 50377-14-1:2011 – 12 – 8.3 Mechanical performance requirements Table – Mechanical performance requirements No Test Fibre/cable retention Requirement Change in attenuation at (1 550 ± 30) nm: ≤ 0,20 dB Initial and final attenuation shall be ≤ specified for grade Return loss: Details Method: EN 61300-2-4 Magnitude and rate of application of the tensile force: Buffered fibre: 5,0 N ± 0,5 N at 0,5 N/s Reinforced cable: 50 N ± N at N/s Point of application of the load: 0,3 m from plug Duration of maximum load: at 50 N at N Specimen optically functioning: Yes Measurements required: Before, during (continuous) and after the test (5 recovery period) Sampling rate: Measurements shall be made after the load has been maintained at its maximum level for at least 30 s Pre-conditioning procedure: Clean plug and adaptor according to the manufacturer’s instructions Method: EN 61300-2-42 Magnitude of the load (90° to plug axis) Buffered fibre: 0,2 N Reinforced cable: 1N Point of application of the load: 0,5 m from rear of plug Method of mounting: An adaptor shall be mounted rigidly to the mounting fixture Duration of load: Buffered fibre: Reinforced cable: 1h Specimen optically functioning: Yes Measurements required: Before, during (continuous) and after the test Sampling rate: max interval Pre-conditioning procedure: Clean plug and adaptor according to the manufacturer’s instructions Grade 1: > 60 dB Grade 2: > 45 dB Static side load Change in attenuation at (1 550 ± 30) nm: ≤ 0,20 dB Initial and final attenuation shall be ≤ specified for grade Return loss: Grade 1: > 60 dB Grade 2: > 45 dB The connector shall be rigidly mounted such that the load is applied to the fibre/cable retention mechanism and not to the coupling mechanism BS EN 50377-14-1:2011 – 13 – EN 50377-14-1:2011 Table – Mechanical performance requirements (continued) No Test Requirement Flexing strain relief of fibre optic devices Change in attenuation at (1 550 ± 30) nm: Method: EN 61300-2-44 Magnitude of the load (90° to plug axis): Reinforced cable: 2N Point of application of the load: 0,2 m from rear of plug Method of mounting: An adaptor shall be mounted rigidly to the mounting fixture Number of cycles: 100 (± 90°) Specimen optically functioning: Yes Measurements required: Before, during (continuous) and after the test Sampling rate: Maximum sampling interval shall be ms according to EN 61300-3-28 Pre-conditioning procedure: Clean plug and adaptor according to the manufacturer’s instructions Method: See test procedure details in Annex C (test procedure requested at IEC/SC 86B/WG 4) Temperature: 23 °C ± °C Coiling diameter: 20 x cable diameter, but not less than 60 mm Return loss: Number of coils: Grade 1: > 60 dB Grade 2: > 45 dB Number of cycles: Cycle time: Leave sample for in coiled and uncoiled position Specimen optically functioning: Yes Measurements required: Before, during (continuous) and after the test Pre-conditioning procedure: h at normal ambient conditions Clean plug and adaptor according to the manufacturer’s instructions Method: EN 61300-3-22 Temperature: 23 °C ± °C Specimen optically functioning: No Pre-conditioning procedure: h at normal ambient conditions Procedure: Position of the ferrule end face relative to mechanical reference plane of the connector while ferrule compression force shall be measured ≤ 0,30 dB during test ≤ 0,20 dB after test Initial and final attenuation shall be ≤ specified for grade Return loss: Grade 1: > 60 dB Grade 2: > 45 dB Cable bend (coiling) Change in attenuation at (1 550 ± 30) nm: ≤ 0,20 dB Initial and final attenuation shall be ≤ specified for grade Ferrule compression force Details Compression force for buffered fibres for 2,5 mm ferrules: 7,8 N to 12,8 N 1,25 mm ferrules: N to N For reinforced cables allow a N higher compression force BS EN 50377-14-1:2011 EN 50377-14-1:2011 – 14 – 8.4 Environmental performance requirements Table – Environmental performance requirements No Test Change of temperature Requirement Details Change in attenuation: Method: EN 61300-2-22 ≤ 0,5 dB during and ≤ 0,4 dB after the test for a m patch cords with both connectors and the cable in the climatic chamber Peak wavelengths: 310 nm ± 30 nm 550 nm ± 30 nm 625 nm ± 20 nm Low temperature: - 10 °C ± °C High temperature: + 60 °C ± °C Duration at temperature extremes: 1h Rate of change of temperature: °C/min Number of cycles: Specimen optically functioning: Yes Measurements required: Before, during (maximum interval 10 min) and after the test, using method EN 61300-3-3 Pre-conditioning procedure: h at normal ambient conditions Clean plug and adaptor according to the manufacturer’s instructions Recovery procedure: h at normal ambient conditions Cable coiled loosely inside the chamber with diameter not smaller than 30 cm Return loss: Grade 1: > 60 dB Grade 2: > 45 dB BS EN 50377-14-1:2011 – 15 – EN 50377-14-1:2011 Annex A (informative) Reference connector details Ferrule outer diameter See relevant EN 50377 series Eccentricity of fibre core centre to ferrule centre < 0,000 mm Deviation of axis of fibre to axis of ferrule < 0,2° Eccentricity of spherically polished ferrule end face < 30 µm Visual examination of fibre end surface with ×200 magnification No defects in core zone Attenuation between two reference plugs @ 310 nm using < 0,10 dB Visual examination At least every 50 matings the connector shall be checked BS EN 50377-14-1:2011 EN 50377-14-1:2011 – 16 – Annex B (normative) Tests, sample size and product sourcing requirements Depending on whether the connector was qualified already before with the same cable or with a different cable, the number of tests will be different – SET A: This set of tests on patch cords shall be performed when the same connector set, the same cable and the same assembly procedure are already qualified as a pig tailed set – SET B: This set of tests on patch cords shall be performed when the connector set is already qualified before as a pigtailed set using the same assembly procedure, but with different cable Table B.1 – Test, sample size and sourcing SET A SET B Same connector set, same boot, same cable Same connector set, different boot or different cable Dimensional X X Attenuation (random mated) X X All Return loss (random mated) X X All Fibre/cable retention X X 4 Static side load X Flexing of strain relief of fibre optic devices X Cable bend (coiling) X X Ferrule compression force X X Change of temperature X X No n/a Test Sample size of patch cords The above tests in Table B.1 are intended to be performed individually in any order on product sourced as defined, although product from a previous test may be used BS EN 50377-14-1:2011 – 17 – EN 50377-14-1:2011 Annex C (normative) Cable bend (coiling) test procedure A m long patch cord is placed on a flat table in such a way that both connectors are placed next to each other and spaced at least 60 mm from each other The cable ends from both connectors remain parallel until the loop back (see Figure C.1) This loop shall have a diameter of 20 × cable diameter, but not smaller than 60 mm The loop will be coiled onto a solid cylinder with diameter of 20 × cable diameter, but not smaller than 60 mm In total complete turns are made with the cylinder, taking care that the cable is coiled onto the cylinder without crossings and without tensile stress The cylinder shall be kept in this position for Then the cable will be completely uncoiled until it reaches its original position before the coiling process started The cable is left in this uncoiled position In total coil/uncoil operations shall be made The change in attenuation shall be measured for each extreme (coiled/uncoiled) position after the extreme position was reached Source Detector Adapters Cylinder with diameter 20 × Øcable Not less than 60 mm Diameter 20 × Øcable Not less than 60 mm Figure C.1 – Cable bend (coiling) test set-up BS EN 50377-14-1:2011 EN 50377-14-1:2011 – 18 – Bibliography EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and measurement procedures (IEC 61300 series) EN 61300-3-4 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-4: Examinations and measurements – Attenuation (IEC 61300-3-4) EN 61300-3-15 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-15: Examinations and measurements – Dome eccentricity of a convex polished ferrule endface (IEC 61300-3-15) EN 61300-3-16 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-16: Examinations and measurements – Endface radius of spherically polished ferrules (IEC 61300-3-16) EN 61300-3-35 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-35: Examinations and measurements – Fibre optic connector endface visual and automated inspection (IEC 61300-3-35) ETSI TS 100 671 Transmission and Multiplexing (TM); Passive optical components; Optical fibre connectors for single mode optical fibre communication systems; Common requirements and conformance testing