• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
DNV Ship/HSLC rules Pt.4 Ch.8 - Electrical
DNV Ship/HSLC rules Pt.4 Ch.8 - Electrical

... G 100 System protection ............................................................................................................................................... 29 G 200 Circuit protection ........................................................................................................ ...
Cisco Wide Area Application Services Software Version 5.4
Cisco Wide Area Application Services Software Version 5.4

... the organization becomes increasingly difficult, causing IT departments to deploy costly and difficult-to-manage infrastructure at each location, including file services, email, video, software distribution, and print services. With continuous pressure from industry and federal regulation, IT depart ...
Electrical Trunking
Electrical Trunking

... lighting and power, fire alarm and telecommunication circuits, they must be separated or segregated to prevent electrical contact (IEE Regulation 528.1). For the purpose of these regulations various circuits are identified by one of two bands as follows:  Band I telephone, radio, bell, call and int ...
The SolarEdge Modbus Meter
The SolarEdge Modbus Meter

... RS485 wiring specifications:  l Cable type: Min. 3-wire shielded twisted pair (a 4-wire cable may be used)  l Wire cross-section area: 0.2- 1 mm²/ 24-18 AWG (a CAT5 cable may be  used) NOTE If using a cable longer than 10 m/33 ft in areas where there is a risk of induced voltage surges by lightning, ...
UPS5000-A-(30 kVA–120 kVA)
UPS5000-A-(30 kVA–120 kVA)

... the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, ...
Advanced Energy® AE 500 Inverter
Advanced Energy® AE 500 Inverter

DNV-OS-D201: Electrical Installations
DNV-OS-D201: Electrical Installations

... — Sec.1: Tables for documentation requirements have been included in Ch.3 Sec.1 and are updated and aligned the matrix approach in Rules for Ships Part 0 Chapter 3 and DNV-RP-A201. — Sec.1: Semiconductor converters may be certified in a “two stage” process: This implies that the switchboard part is ...
Service Guide Specification
Service Guide Specification

Network Analysis Module
Network Analysis Module

... Cisco Validated Designs (CVDs) present systems that are based on common use cases or engineering priorities. CVDs incorporate a broad set of technologies, features, and applications that address customer needs. Cisco engineers have comprehensively tested and documented each design in order to ensure ...
Guía de Soluciones: Seguridad
Guía de Soluciones: Seguridad

... adaptándose a las amenazas de fuentes tanto internas como externas. Con esta protección, las empresas son más capaces de aprovechar sus recursos de red, mejorando así los procesos de negocio y reduciendo costes. Tres características estándar de la Self Defending Network de Cisco 1. Integración Están ...
MELSEC iQ-F FX5U User`s Manual (Hardware)
MELSEC iQ-F FX5U User`s Manual (Hardware)

... prevent damage to the equipment at the upper and lower positioning limits.) - Note that when the CPU module detects an error, such as a watchdog timer error, during selfdiagnosis, all outputs are turned off. Also, when an error that cannot be detected by the CPU module occurs in an input/output cont ...
ULTRA 100 Series Drives Installation Manual
ULTRA 100 Series Drives Installation Manual

Advanced Energy® AE 500TX Inverter
Advanced Energy® AE 500TX Inverter

20 - 80 kVA UPS User`s and Installation Manual
20 - 80 kVA UPS User`s and Installation Manual

... equipment: computers, workstations, sales terminals, critical instrumentation, telecommunications systems, process control systems, etc. The UPS protects them from problems associated with utility power of poor quality, or a complete loss of power. Sensitive electrical equipment needs protection fro ...
Adept MV Controller User`s Guide
Adept MV Controller User`s Guide

... Controllers MV-5 (P/N 30340-10000 and 30340-30000), MV-8 (P/N 30330-15000), MV-10 (P/N 30340-20000 and 30340-40000) or MV-19 (P/N 30330-25000), with/without Operator’s Manual Control Pendant (MCP III) (P/N 90332-48050) VME Front Panel Category 1 (P/N90332-00380) or Category 3 (P/N 90335-00380) in th ...
Electronics 123
Electronics 123

Juniper Networks NetScreen-5GT Series
Juniper Networks NetScreen-5GT Series

... below come standard with the following features: • Security: Use the Stateful and Deep Inspection firewall, DoS protection and embedded antivirus to stop network and application level attacks and defend against the propagation of worms and viruses. Prevent users from transmitting private or corporate ...
Wire Size Specifications - by Quail Electronics, Inc.
Wire Size Specifications - by Quail Electronics, Inc.

broadband business - Andatelecomindia.com
broadband business - Andatelecomindia.com

... All Telindus access equipment carries the CE mark and conforms to all relevant international standards related to safety and electromagnetic radiation and immunity. Following list of standards is applicable to all the access equipment mentioned in this catalogue. A short explanation of each of them ...
Liebert eXM User Manual–120-200kVA, 50/60Hz ®
Liebert eXM User Manual–120-200kVA, 50/60Hz ®

... Single UPS block diagram—Dual input, single source configuration, without bypass cabinet . . Single UPS block diagram—Dual input, single source configuration with MBC . . . . . . . . . . . . . Input busbars—Liebert eXM 120-200kVA frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Voltage Regulators - Aeroflex Microelectronic Solutions
Voltage Regulators - Aeroflex Microelectronic Solutions

... The Aeroflex Plainview VGR8601/02 consists of a positive (RH117) and a negative (RH137) voltage regulator each capable of supplying in excess of 1.5Amps over the output voltage range as defined under recommended operating conditions. Each regulator is exceptionally easy to set-up, requiring only 2 e ...
XAPP480 - 利用 Spartan-3 系列 FPGA 的悬挂模式
XAPP480 - 利用 Spartan-3 系列 FPGA 的悬挂模式

... FPGA into the power-saving Suspend mode. Data values are captured for I/O pins with a SUSPEND constraint set to DRIVE_LAST_VALUE; however, this value is not presented ...
Undulator Controls
Undulator Controls

... The LCLS undulator line consists of a series of 33 identical undulator segments. The control and monitoring equipment for each segment will reside in a 19” rack located beneath each undulator girder. Three separate units will be housed in that rack – the Motor Power/AC interlock chassis, the Undulat ...
PVI 23TL PVI 28TL INSTALLATION AND OPERATION MANUAL
PVI 23TL PVI 28TL INSTALLATION AND OPERATION MANUAL

Serial Server Installation Guide
Serial Server Installation Guide

... The MSS1-T and MSS1-T2 are multiprotocol micro serial servers that provide Ethernet connections for personal computers, terminals, modems, and devices that would not otherwise be connected to a network. The MSS100 additionally provides Fast Ethernet support. NOTE: In this manual, all MSS models will ...
< 1 2 3 4 5 6 7 8 ... 576 >

Power over Ethernet



Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras. Unlike standards such as Universal Serial Bus which also power devices over the data cables, PoE allows long cable lengths. Power may be carried on the same conductors as the data, or it may be carried on dedicated conductors in the same cable.There are several common techniques for transmitting power over Ethernet cabling. Two of them have been standardized by IEEE 802.3. Since only two of the four pairs are needed for 10BASE-T or 100BASE-TX, power may be transmitted on the unused conductors of a cable. In the IEEE standards, this is referred to as Alternative B. Power may also be transmitted on the data conductors by applying a common-mode voltage to each pair. Because twisted-pair Ethernet uses differential signalling, this does not interfere with data transmission. The common mode voltage is easily extracted using the center tap of the standard Ethernet pulse transformer. This is similar to the phantom power technique commonly used for powering audio microphones. In the IEEE standards, this is referred to as Alternative A.In addition to standardizing existing practice for spare-pair and common-mode data pair power transmission, the IEEE PoE standards provide for signalling between the power sourcing equipment (PSE) and powered device (PD). This signaling allows the presence of a conformant device to be detected by the power source, and allows the device and source to negotiate the amount of power required or available. Up to a 25.5 watts is available for a device.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report