1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 294B Power Over Ethernet (PoE) Power Sources for Access Control Systems and EquipmentUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U
2、LUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Power Over Ethernet (PoE) Power Sources for Access Control Systems and Equipment, UL 294B First Edition, Dated May 10, 2013 Summary of Topics The revisions dated Feb
3、ruary 2, 2015 were issued to extend the effective date for the Standard from December 2, 2015 to December 2, 2018. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical
4、 line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means,
5、 electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will
6、UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possi
7、bility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, l
8、iability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections,
9、 tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQU
10、IREMENTS notice. The following table lists the future effective dates with the corresponding reference. FEBRUARY 2, 2015 UL 294B tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date Reference December 2, 2018 Entire stand
11、ard FEBRUARY 2, 2015 UL 294B tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 10, 2013 (Title Page Reprinted: February 2, 2015) 1 UL 294B Standard for Power Over Ethernet (PoE) Power Sources for Access Control Systems and Equipment Fir
12、st Edition May 10, 2013 This ANSI/UL Standard for Safety consists of the First Edition including revisions through February 2, 2015. The most recent designation of ANSI/UL 294B as an American National Standard (ANSI) occurred on May 10, 2013. ANSI approval for a standard does not include the Cover P
13、age, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs
14、Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABO
15、RATORIES INC. ANSI/UL 294B-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 10, 2013 UL 294B 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INT
16、RODUCTION 1 Scope .4 2 General 4 2.1 General .4 2.2 Additional documentation requirements 4 2.3 Components .5 2.4 Units of measurement .5 2.5 Undated references .5 3 Glossary .6 4 Installation and Operation 8 4.1 Communications circuits .8 4.2 Location of Midspan PSE or Power Injector 8 4.3 Cabling
17、requirements .8 PERFORMANCE 5 Abnormal Operation Tests .8 MARKING 6 Marking Requirements 10 APPENDIX A Standards for ComponentsA1 APPENDIX B B.1 Reference Publications .B1 MAY 10, 2013 UL 294B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL
18、 INTRODUCTION 1 Scope Effective date for 1 changed from December 2, 2015 to December 2, 2018 1.1 This standard provides requirements for the evaluation of Power over Ethernet (PoE) power sources for access control systems and equipment. The power sources may be provided integral with the access cont
19、rol equipment or as a separate device supplying power. The equipment is intended to comply with Article 725.121, Power Sources for Class 2 and Class 3 Circuits, of the National Electrical Code, NFPA 70. Equipment covered by this standard provides a nominal source voltage of 48 or 53 V DC. 1.2 This s
20、tandard applies to all connected equipment and interconnections necessary to ensure normal operation of the PoE powered control system. 1.3 PoE sources covered by this standard are not intended to be located in an outdoor environment. 1.4 The PoE source shall meet the applicable requirements of the
21、Standard for Access Control System Units, UL 294. See 2.2.4 and 2.2.5. Exception: Outdoor Use Equipment; Sections 70 81 of UL 294 inclusive are not applicable. 2 General Effective date for 2 changed from December 2, 2015 to December 2, 2018 2.1 General 2.1.1 Products intended for use in air-handling
22、 spaces in accordance with Section 300.22 (C) of the National Electrical Code, NFPA 70, are additionally investigated to the Standard for Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces, UL 2043. 2.2 Additional documentation r
23、equirements 2.2.1 Products that utilize PoE are connected through standard eight pin RJ-45 connectors. The connector conguration shall be supplied in documentation with the PoE power source. 2.2.2 The equipment shall be provided with information concerning the power sourcing equipment (PSE) connecto
24、r conguration, whether Alternative A or Alternative B or both, and the maximum power class supported by the (PSE), as dened in the appropriate IEEE standard. 2.2.3 PoE based power sources that meet the requirements of this standard shall specify the UL 294 compliant PoE powered access control system
25、 and equipment with which it is compatible with. 2.2.4 PoE power sources specied in 2.2.3 shall be tested and in compliance with the Standard for Access Control System Units, UL 294 or shall comply with the requirements of 2.2.5. FEBRUARY 2, 2015 UL 294B 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F
26、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2.5 PoE power sources specied in 2.2.3 shall comply with the Standard for Information Technology Equipment Safety Part 1: General Requirements, UL 60950-1 and meet the requirements of 8.1 and 33.1 of the Standard for Access Control Sys
27、tem Units, UL 294. 2.3 Components 2.3.1 Except as indicated in 2.3.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of Standards covering components generally used in the products covered by this standard. 2.3.2 A c
28、omponent is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3.3 A component shall be used in accordance wi
29、th its manufacturers rating and/or that established for the intended conditions of use. 2.3.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exce
30、eding specied limits, and shall be used only under those specic conditions. 2.4 Units of measurement 2.4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.4.2 Unless otherwise indicated, all voltage and current values mention
31、ed in this standard are root-mean-square (rms). 2.5 Undated references 2.5.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. MAY 10, 2013 UL 294B 5UL COPYRIGHTED MATERIAL NOT
32、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary Effective date for 3 changed from December 2, 2015 to December 2, 2018 3.1 For the purpose of this standard the following denitions apply. 3.2 ACCESS CONTROL A means and/or measure to regulate or control: a) En
33、try and/or exit to/from a protected area or a restricted area or b) Physical access to or the use of a device(s) by electrical, electronic or mechanical means. 3.3 ACCESS CONTROL SYSTEM A collection of means, measures and specic practices that when combined, form or compose a systematic approach, wh
34、ich enables an authority to control access to areas and resources in a given physical facility. An access control system, within the eld of physical security, is generally seen as the second layer in the security of a physical structure. 3.4 CIRCUITS, ELECTRICAL: a) High-Voltage A circuit involving
35、a potential of not more than 600 volts and having circuit characteristics in excess of those of a low-voltage power limited circuit. b) Low-Voltage A circuit involving a potential of not more than 30 volts alternating current (AC), 42.4 volts direct current (DC) or AC peak. 3.5 ENDSPAN A device that
36、 is typically a network switch that is capable of supplying PoE power. 3.6 EQUIPMENT Any part of an electronic access control system, such as access control units, reader interface modules, access point actuators, access point sensors, keypads, and the like. 3.7 ETHERNET CABLING A structured cabling
37、 system using 4 pair unshielded or shielded twisted pair cable, meeting Category 5e performance or higher and conforming to the Standard for Balanced Twisted-Pair Telecommunications Cabling and Components, ANSI/TIA-568C.2 requirements. The extent of the cabling is taken to be the channel that connec
38、ts the appropriate port of the network switch to the powered device. 3.8 LINE-VOLTAGE The voltage (commonly 115, 208, and 230 volts) at any eld-connected source of supply, nominally 50 60 hertz (Hz); 115, 208, or 230 volts. 3.9 MIDSPAN A midspan device is a Power Sourcing Equipment (PSE) that insert
39、s power onto ethernet cable. It is located between the network switch and the Powered Device (PD). 3.10 NETWORK SWITCH Active electronic equipment that selects a path or circuit for sending a unit of data to its next destination. 3.11 NOMINAL VOLTAGE The generally understood voltage supplied by the
40、power sourcing equipment at its output terminals when operated in source, i.e. continuous operation. The voltage range for PoE is 44 to 57 V DC with nominal voltage of 48 volts DC. For PoE+, the voltage range is 50 to 57 V DC with a nominal voltage of 53 Volts DC. 3.12 PoE A generic term referring t
41、o equipment conforming to the requirements of the Standard for Information Technology Telecommunications and Information Exchange Between Systems Local and Metropolitan Area Networks Specic requirements Part 3: Carrier Sense Multiple Access with FEBRUARY 2, 2015 UL 294B 6UL COPYRIGHTED MATERIAL NOT
42、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Collision Detection (CSMA/CD) Access Method and Physical Layer Specications Amendment 3: Data Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements, IEEE 802.3af. Note PoE is often used to de
43、note generically PoE or PoE+. 3.13 PoE+ A generic term referring to equipment conforming to the requirements of the Standard for Information Technology Telecommunications and Information Exchange Between Systems Local and Metropolitan Area Networks Specic requirements Part 3: Carrier Sense Multiple
44、Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specications Amendment 3: Data Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements, IEEE 802.3at. 3.14 POWERED DEVICE (PD) An ethernet device that receives power through the ethernet cabling. 3
45、.15 POWER INJECTOR (Alternative terms Injector or Power Brick) A powered device similar to a PoE midspan device, comprising three ports. These are: a) Data in, typically from the network switch, b) Data and power nominal 48 or 53 VDC, out and c) Line voltage from a utility supply. When a power injec
46、tor compliant to this standard is used with access control systems and equipment, that system and equipment shall comply with the Standard for Access Control System Units, UL 294. The output voltage, V PORT , of the power injector will comply with the requirements in the appropriate IEEE standard. 3
47、.16 POWER OVER ETHERNET (PoE or PoE+) A means to supply power to a network device over Category 5e or higher performance ethernet cabling. The power supplied to the device may or may not be on the same conductors supporting data. 3.17 POWER SOURCING EQUIPMENT (PSE) The power supply that provides pow
48、er to the Powered Device through the ethernet cabling. It may be an endspan device, such as a PoE enabled network switch, or a midspan device that is located in between the switch and the powered device. MAY 10, 2013 UL 294B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIB
49、UTION WITHOUT PERMISSION FROM UL 4 Installation and Operation Effective date for 4 changed from December 2, 2015 to December 2, 2018 4.1 Communications circuits 4.1.1 Where a product has provisions for connection to a telephone, or outside wiring as covered by Article 800 in the National Electrical Code, NFPA 70, the product shall comply with the requirements for Protection Against Overvoltage From Power Line Crosses described in the Standard for Information Techn
