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UL 294B
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UL 294B Standard for Power Over Ethernet (PoE) Power Sources for Access Control Systems and Equipment
standard by Underwriters Laboratories, 05/10/2013
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Full Description
Please note: All interim revisions for this edition available at time of your purchase will be included.Power Over Ethernet (PoE) Power Sources for Access Control Systems and Equipment
UL 294B
1 Scope
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 control 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 standard 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 Standard for Access Control System Units, UL 294. See 2.2.4 and 2.2.5.Outdoor Use Equipment; Sections 70 - 81 of UL 294 inclusive are not applicable.