UL 294B:2015 pdf download – Power Over Ethernet (PoE) Power Sources for Access Control Systems and Equipment.
3 Glossary
Ef?ecbve date low 3 chanced Irom Decernb& 2. 201510 December 2, 2018
3.1 For the purpose of this standard the following definitions apply.
3.2 ACCESS CONTROL — A means and/or measure to regulate or control:
a) Entry 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 specific practices that when combined, form or compose a systematic approach, which enables an authority to control access to areas and resources In a given physical facility. An access control system, within the field 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 a potential of not more than 600 volts and having circuit characteristics in excess of those of a low-voltage power limited circuit.
b) LowVoltage — 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 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 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, ANSITIA-568C.2 requirements. The extent of the cabling is taken to be the channel that connects the appropnate port of the network switch to the powered device.
3.8 LINE-VOIJAGE — The voltage (commonly 115, 208, and 230 volts) at any field-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 inserts 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 VOL.TAGE — The generally understood voltage supplied by the 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 to equipment conforming to the requirements of the Standard for Information Technology — Telecommunications and Information Exchange Between Systems — Local and Metropolitan Area Networks Specific requirements Part 3: Carrier Sense Multiple Access with
Collision Detection (CSMA.CD) Access Method and Physical Layer Specifications Amendment 3: Data
Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements, IEEE
802.3a1, Note PoE is often used to denote generically PoE or PoE+.
3.13 PoE. — A generic term referring to equipment conforming to the requirements of the Standard lot
Information Technology — Telecommunications and Information Exchange Between Systems — Local
and Metropolitan Area Networks Specific requirements Part 3: Carrier Sense Multiple Access with
Collision Detection (CSMACD) Access Method and Physical Layer Specifications Amendment 3: Data
Terminal Equipment (OTE) 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.
3.15 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 injector 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. VpT. of the power injeCtor will comply with the requirements in the appropriate IEEE standard.