1、 TIA-569-D-1 (Addendum to TIA-569-D) October 2016Telecommunications Pathways and Spaces: Addendum 1- Revised Temperature and Humidity Requirements for Telecommunications Spaces ANSI/TIA-569-D-1-2016 APPROVED: OCTOBER 21, 2016 NOTICE TIA Engineering Standards and Publications are designed to serve th
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23、HE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-569-D-1 i TELECOMMUNICATIONS PATHWAYS AND SPACES ADDENDUM 1 REVISED TEMPERATURE AND HUMIDITY REQUIREMENTS FOR TELECOMMUNICATIONS SPACES Table of Contents FOREWORD . ii 1 SCOPE . 1 2 NOR
24、MATIVE REFERENCES . 1 3 DEFINITIONS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE . 1 3.1 General 1 3.2 Definitions 1 3.3 Acronyms and abbreviation 1 3.4 Units of measure 1 4 REPLACEMENT OF CLAUSE 6.2 . 1 6.2 Temperature and humidity requirements 2 List of Tables Table 2 Temperature and humidity req
25、uirements for telecommunications spaces . 3 ANSI/TIA-569-D-1 ii FOREWORD (This foreword is not considered part of this Addendum.) This Addendum was developed by TIA Subcommittee TR-42.3. Approval of this Addendum This Addendum was approved by TIA Subcommittee TR-42.3, TIA Engineering Committee TR-42
26、, and the American National Standards Institute (ANSI). ANSI/TIA reviews standards every 5 years. At that time, standards are reaffirmed, withdrawn, or revised according to the submitted updates. Updates to be included in the next revision should be sent to the committee chair or to ANSI/TIA. Docume
27、nts superseded This Addendum supersedes the temperature and humidity requirements in clause 6.2 of ANSI/TIA-569-D. Purpose The purpose of this Addendum is to provide revised temperature and humidity requirements which are harmonized with the guidelines published in ASHRAE Thermal Guidelines for Data
28、 Processing Environments, Fourth Edition. Introduction In 2015 ASHRAE published the fourth edition of Thermal Guidelines for Data Processing Envi-ronments. The major change in this edition was a lowering of both the recommended and al-lowable humidity range for classes A1 through A4. This change was
29、 made after extensive re-search into the effects of low humidity on data processing equipment in data center environ-ments. This addendum aligns the recommended and required minimum humidity with the new AHSRAE guidelines. In addition, several small inconsistencies in table 2 were corrected. ANSI/TI
30、A-569-D-1 1 1 SCOPE This Addendum specifies revised temperature and humidity requirements and recommenda-tions for telecommunications spaces. 2 NORMATIVE REFERENCES The following standards contain provisions which, through reference in this text, constitute pro-visions of this Addendum. At the time
31、of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are en-couraged to investigate the possibility of applying the most recent editions of the standards indi-cated below. ANSI and TIA maintain registers of current
32、ly valid national standards published by them. ASHRAE, Thermal Guidelines for Data Processing Environments, Fourth Edition, 2015 NOTE On April 4, 2016, ASHRAE issued an errata to the above referenced document which corrected errors in the information on which this Addendum is based. 3 DEFINITIONS, A
33、CRONYMS AND ABBREVIATIONS, UNITS OF MEASURE 3.1 General The generic definitions in this clause have been formulated for use by the entire family of tele-communications infrastructure standards. Specific requirements are found in the normative clauses of this Addendum. 3.2 Definitions For the purpose
34、s of this Addendum, the definitions of ANSI/TIA-569-D apply. 3.3 Acronyms and abbreviation For the purposes of this Addendum, the acronyms and abbreviations of ANSI/TIA-569-D and the following apply: DP dew point RH relative humidity 3.4 Units of measure For the purposes of this Addendum, the units
35、of measure of ANSI/TIA-569-D apply. 4 REPLACEMENT OF CLAUSE 6.2 Clause 6.2 and table 2 of ANSI/TIA-569-D are replaced with the following: ANSI/TIA-569-D-1 2 6.2 Temperature and humidity requirements Temperature and humidity in telecommunications spaces shall be controlled to provide continu-ous oper
36、ating ranges for their designated ASHRAE classes as specified in table 2. In addition, for classes A1, A2, A3 and A4, temperature and humidity should be controlled to provide con-tinuous operating ranges as follows: Temperature: 18 27 C (64 81 F) Humidity range, noncondensing: -9 C (16 F) DP to 15 C
37、 (59 F) DP and 60% RH NOTE At high elevations the maximum temperature of table 2 will be lower than and will supersede the recommended maximum above. See note 2 to table 2. See the ASHRAE Thermal Guidelines for Data Processing Environments for more information on ASHRAE classes. CAUTION Users are st
38、rongly advised to consult the ASHRAE Thermal Guide-lines for Data Processing Environments for information on tradeoffs between en-ergy usage and equipment life before selecting a required operating range for classes A1, A2, A3 and A4. The maximum cabling distance for balanced twisted-pair cabling ma
39、y need to be reduced de-pending upon the average temperature of the environment over the length of the cable. See ANSI/TIA-568-C.2 for guidance on cabling installation in higher temperature environments. The temperature and humidity shall be measured while the equipment is in operation. Tempera-ture
40、 and humidity shall be measured at air intakes of operating (powered) equipment. Except in distributor enclosures, temperature and humidity should also be measured at a distance of 1.5 m (5 ft) above the floor level every 3 to 9 m (10 to 30 ft) along the center line of the aisles at the front of the
41、 cabinets or racks. In distributor enclosures the temperature and humidity should also be measured as near as practical to the center of the enclosure. Temperature measurements should be taken at several air intake locations of any equipment with potential cooling problems. Refer to ASHRAE Thermal G
42、uidelines for Data Processing Environments for more detailed guidelines for measuring and evaluating temperatures in telecommunications spaces. NOTE Temperatures at some locations within the space may exceed the val-ues in table 2. See TIA TSB-153 for electrostatic discharge (ESD) mitigation guideli
43、nes. ANSI/TIA-569-D-1 3 Table 2 Temperature and humidity requirements for telecommunications spaces ASHRAE Class Space (see clause)Environmental requirements Class A1 See note 1 Temperature: 15 32 C (59 90 F) dry bulb2 Maximum rate of temperature change: 5 C (9 F) per hour in spaces where tape drive
44、s are present, otherwise 20 C (36 F) per hour Humidity range, noncondensing: -12 C (10 F) DP and 8% RH to 17 C (63 F) DP and 80% RH Class A2 See note 1 Temperature: 10 35 C (50 95 F) dry bulb2 Maximum rate of temperature change: 5 C (9 F) per hour in spaces where tape drives are present, otherwise 2
45、0 C (36 F) per hour Humidity range, noncondensing: -12 C (10 F) DP and 8% RH to 21 C (70 F) DP and 80% RH Class A3 See note 1 Temperature: 5 40 C (41 104 F) dry bulb2,3 Maximum rate of temperature change: 5 C (9 F) per hour in spaces where tape drives are present, otherwise 20 C (36 F) per hour Humi
46、dity range, noncondensing: -12 C (10 F) DP and 8% RH to 24 C (75 F) DP and 85% RH Class A4 See note 1 Temperature: 5 45 C (41 113 F) dry bulb2,3 Maximum rate of temperature change: 5 C (9 F) per hour in spaces where tape drives are present, otherwise 20 C (36 F) per hour Humidity range, noncondensin
47、g: -12 C (10 F) DP and 8% RH to 24 C (75 F) DP and 90% RH Class B Distributor room (6.4) Distributor enclosure (6.6) Entrance room or space (6.5) Access provider space (7) Service provider space (7) Common distributor room (8.2) Temperature: 5 35 C (41 95 F) dry bulb2,3 Humidity range, noncondensing
48、: 8% RH to 28 C (82 F) DP and 80% RH Class C See note 1 Temperature: 5 40 C (41 104 F) dry bulb2,3 Humidity range, noncondensing: 8% RH to 28 C (82 F) DP and 80% RH NOTES: 1. Class A1, Class A2, Class A3, Class A4 and Class C are not referenced by this Standard. They are included for reference by sp
49、ecific premises standards. 2. Reduce maximum temperature at altitude above 900 m (3000 ft): A1, A2, B, C: 1 C per 300 m (1.8 F per 1000 ft); A3: 1 C per 175 m (1.8 F per 575 ft); A4: 1 C per 125 m (1.8 F per 410 ft). 3. Minimum temperature with a diskette in a drive is 10 C (50 F). 4. The ASHRAE Thermal Guidelines for Data Processing Environments provide both recommended and allowable ranges. The requirements in this table are based on the allowa
