1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY 6, 20171UL 4299Outline of Investigation for Power Over HDBaseT (PoH) CablesIssue Number: 1February 6, 2017Summary of TopicsThis first issue of the Outline of Investigation for Power Over
2、 HDBaseT(PoH) Cables, UL 4299 covers the evaluation of 4-pair LAN cable to carry100 watts of power (0.5 amperes at a nominal 50 volts) in a Power overHDBaseT (PoH) configuration without exceeding the temperature rating ofthe cable. It also ensures that the cable will meet the performancerequirements
3、 set by the HDBaseT Alliance while operating at the elevatedtemperatures resulting from the cable carrying current.ULs Outlines of Investigation are copyrighted by UL LLC. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investig
4、ation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of ULLLC.COPYRIGHT 2017 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY 6, 2017UL 42992No Tex
5、t on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Reference publications 43 General 4PERFORMANCE4 Cable Heating Test 54.1 General .54.2 Test procedure .55 Cable Elevated Temperature Performance Test
6、65.1 General .65.2 Test equipment 65.3 Test procedure .7MARKING6 Marking 8FEBRUARY 6, 2017 UL 4299 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This Outline describes the requirements used to evaluate 4-pair communic
7、ations cables (LAN)intended to supply 100 watts of power (0.5 amperes per conductor at a nominal 50 V) over HDBaseT(PoH) protocol. The safety related requirements and cable performance in accordance with the HDBaseTAlliance specifications at the elevated temperatures caused by current passing throug
8、h the cable aredescribed in this Outline.2 Reference publications2.1 Any undated reference to a code or standard appearing in the requirements of this Outline ofInvestigation shall be interpreted as referring to the latest edition of that code or standard.ASTMANSI/ASTM E230/E230MStandard Specificati
9、on and Temperature-Electromotive Force (emf) Tables for StandardizedThermocouplesTIAANSI/TIA 568 C.2-2009Balanced Twisted-Pair Telecommunications Cabling and Components StandardULUL 13Power-Limited Circuit CablesUL 444Communications Cables3 General3.1 The cable under test shall meet the following ge
10、neral requirements:a) The cable shall comply with the applicable requirements described in UL 444 or UL 13.b) The cable shall comply with the data transmission performance requirements described inaccordance with the latest version of the ANSI/TIA-568 Standards as category 5e or higher.c) The cable
11、shall be an HDBaseT Alliance Recommended Cable meeting the requirementsset by the HDBaseT Alliance and appearing on their recommended cables list.FEBRUARY 6, 2017UL 42994UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANCE4 Cable Heatin
12、g Test4.1 General4.1.1 When tested as described in this section, the temperatures measured on the insulation and jacketof the cables, after being corrected to an ambient of 25C, shall not exceed the temperature rating of thecable.4.1.2 The temperature rise over ambient shall be determined in accorda
13、nce with the test proceduredescribed in 4.2. The temperatures measured are used as the basis for the Cable Elevated TemperaturePerformance Test, Section 5.4.1.3 A cable that complies with the Cable Heating Test at 0.5 amperes as described in UL 444 or UL 13need not be subjected to this cable heating
14、 test provided that the temperature rise data at 0.5 amperesper conductor is available for the Cable Elevated Temperature Performance Test, Section 5.4.2 Test procedure4.2.1 The cables shall be arranged in a tightly packed bundle consisting of 7, 61, or 192 cables. Theseven cable bundle shall be arr
15、anged in a hexagonal densest packing structure which represents theworst case thermal dissipation situation. For the 61 and 192 cable bundles, the inner 37 cables shall bearranged in a hexagonal densest packing structure which represents the worst case thermal dissipationsituation. The remaining cab
16、les shall be evenly distributed to form the rest of the cable bundle. The bundleshall be placed in a 1.83 m 5 cm (6 foot 2 inches) long commercially available non-metallic conduit(Schedule 40) with the minimum diameter needed to install the bundle without putting pressure on thecables. Each end of t
17、he conduit shall be filled with insulation.4.2.2 All of the conductors in the cables shall be electrically connected in series to a power supplycapable of providing 0.5 amperes. It is permitted to electrically divide the conductors into two or morecircuits, each with its own power supply, to obtain
18、the required current. The cables are operatedcontinuously until thermal stabilization. Thermal stabilization is considered to exist when three successivereadings, taken at 15 minute intervals, are within 1C of each other and indicate no further rise above thechanges in ambient temperature.4.2.3 The
19、temperatures shall be measured on the outer jacket and conductor insulation of the centercable at the midpoint of the cable. In addition, temperatures shall be measured on the jacket andconductor insulation on the center cable 0.6 m (2 feet) on each side of the center thermocouple forreference purpo
20、ses.4.2.4 Temperatures are to be measured by means of thermocouples that are not larger than 0.21 mm2(24 AWG) and not smaller than 0.05 mm2(30 AWG). When thermocouples are used in determiningtemperatures, it is common practice to employ thermocouples consisting of 0.05 mm2iron and constantanwires wi
21、th a suitable temperature indicating instrument. This equipment is to be used whenever a refereemeasurement of temperature is necessary.FEBRUARY 6, 2017 UL 4299 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4.2.5 The thermocouples and relat
22、ed instruments are to be accurate and calibrated in accordance withstandard laboratory practice. The thermocouple wire is to conform to the requirements specified in theTolerances on Initial Values of EMF versus Temperature tables in ANSI/ASTM E230/E230M.4.2.6 A thermocouple junction and adjacent th
23、ermocouple lead wire are to be securely held in goodthermal contact with the surface of the material whose temperature is being measured. In most cases,acceptable thermal contact results from securely taping or cementing the thermocouple in place.5 Cable Elevated Temperature Performance Test5.1 Gene
24、ral5.1.1 When tested as described in this section, the cables shall comply with the Active mode performanceparameters (Golden Unit (GU) described in Table 5.1.Table 5.1Active mode performance parametersActive mode Main Built-InSelf Test(BIST) tokentypeMainretransmissionrate passcriteriaMain Built-In
25、Self Test(BIST) BitError Rate(BER) passcriteriaAuxiliaryBuilt-In SelfTest (BIST)Bit ErrorRate (BER)pass criteriaMinimumMean Square(MSE) mainchannelMinimumMean Square(MSE) auxchannelRequirements 500 TOKD16 Retransmissionrate 1/500 (1error perpackets)BER10E-9 BER10E-12 12dB 17.5dB5.2 Test equipment5.2
26、.1 The test equipment shall consist of a transmitting Golden Unit (TX GU), Model VS2-EVK1-TX,manufactured by Valens and a Receiving Golden Unit (RX GU), Model Valens VS2-EVK1-RX,manufactured by Valens.5.2.2 The results shall be measured using a computer using the software developed to support HDBase
27、T2.0 CTS. It is acceptable to use HDBaseT 2.0 CTS software that was modified for cable testing only.5.2.3 The thermal chamber shall consist of an air-circulating oven.FEBRUARY 6, 2017UL 42996UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.3
28、Test procedure5.3.1 A previously untested cable shall be cut to a length of 80 meters (262 feet) for CAT5e cable and 90meters (295 feet) for CAT6/6A/7/7A cables. Each end of the cable shall be terminated in an 8-pin modularjack with a minimum category performance designation of the category classifi
29、cation of the cable undertest. Either TIA 568 A or TIA 568 B Straight Cable Wiring configurations shall be used and the assemblychecked with a network analyzer. See Figure 5.1.This is generated text for figtxt.5.3.2 The TX GU (Transmit Golden Unit) HDBaseT port shall be connected to the RX GU (Recei
30、veGolden Unit) HDBaseT port using the cable under test and two 5 m (16 feet) patch cords.5.3.3 The test is performed by running the CTS software and selecting the test 7.1.1.1 HDBTRecommended Cable Test. The software runs through the following test-steps and automatically recordsthe data.a) The GU i
31、s set to Mode 500 and confirmed that the HDBaseT link is active.b) GU enables TOKD16 protected BIST traffic on the TX port.c) GU monitors and outputs Main retransmission rate and Main and Aux MSE.d) Enable BIST traffic on the GU RX port, clear statistic and run the BIST for 5 minutes.e) GU retrieves
32、 Main and Aux BIST BER.Figure 5.1Test set-upFEBRUARY 6, 2017 UL 4299 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.3.4 The cable under test shall then be placed in a thermal chamber set at a temperature equal to themaximum cable temperatu
33、re measured during the Cable Heating Test, Section 4, corrected to an ambientof 25C. The corrected temperature is determined by adding 25C to the measured temperature rise overroom ambient at the time the measurement was taken. To compensate for the length subjected to heating,the temperature of the
34、 thermal chamber shall be set to the average temperature based on the followingcalculation: 0.75(corrected temperature) + .25(25). The lengths shall be spaced such that each lengthdoes not come in contact with a corresponding length.5.3.5 The patch cords shall not be placed in the thermal chamber. T
35、he temperature of the cable undertest shall be allowed to stabilize at the elevated temperature and the steps described in 5.3.2 and 5.3.3shall be repeated. While still in the oven, the cables shall comply with the Active mode performanceparameters (Golden Unit (GU) described in Table 5.1.MARKING6 M
36、arking6.1 For cables that have not been evaluated for unrestricted bundle sizes, the smallest shipping cartonshall be marked with either 7-cable bundles or 61-cable bundles as applicable.6.2 The cable and the smallest shipping carton shall be marked with the category of the cable.FEBRUARY 6, 2017UL 42998
