BLACKBOX-LPJ001A-T 802.3at PoE Gigabit Injector, 1-Port

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BLACKBOX-LPJ001A-T 802.3at PoE Gigabit Injector, 1-Port

5249709

商品編號: BLACKBOX-LPJ001A-T

BLACKBOX-LPJ001A-T 802.3at PoE Gigabit Injector, 1-Port

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★★★★商品說明★★★★

Description

802.3at PoE Gigabit Injector, 1-Port

Quick Facts

A single-port, midspan injector that’s 802.3at compatible for devices requiring higher wattage.

Provides 33.6 W of safe Power over Ethernet (PoE) Plus power and it supports Gigabit data speeds.

UNH-IOL test lab certified for interoperability with other PoE equipment.

Further Details

An economical wiring solution. Carries both data and power over a single Ethernet cable.

Powers 802.3at compliant devices, which require more power than that provided by standard PoE.

Ideal for multiradio wireless access points, PTZ security cameras, IP phones containing streaming video displays, and LCDs.

Enables you to avoid installing AC power at a remote camera, access point, or thin client. Move equipment from room to room without costly, time-consuming rewiring.

Supports 10-/100-/1000-Mbps midspan data connections on an RJ-45 input/output.

Provides overvoltage/overcurrent overload protection as well as short circuit protection on the power output (per 802.3at specifications).

Diagnostic LEDs indicate 802.3at device detection and alert you to faults.

Backward compatible with 802.3af standard equipment.

Performs “two-finger” classification sequence, determining if the connected device requires 802.3at-level power.

Also supports connections to Cisco® legacy equipment, including Cisco AP1250 Series access points running in full power mode.

Simple plug-and-play installation.

Compact, weighs less than half a pound, and can be easily wallmounted.

RoHS compliant.
　

Technical Specifications for 802.3at PoE Gigabit Injector, 1-Port:

Compliance — cUL/UL®; SAA; FCC Part 15 Class B; EN55022 Class B; CCC; SABS; PHC; C-Tick
Load (Maximum) — 0.60 A
Regulation — Line and load: 54–57 VDC under all conditions
CE Approval — Yes
RoHS Compliance — Yes
Connectors — Data in: (1) RJ-45 (10/100/1000);
Data/PoE out: (1) RJ-45 (10/100/1000);
Power inlet: (1) IEC 320 (3-pin)
Indicators — Green LED 1: Input power “ON”;
Green LED 2: Valid 802.3at load detected and connected;
Red LED: Fault detected
Power — AC input voltage range: 90–264 VAC;
AC input voltage rating: 100–240 VAC, 47–63 Hz;
Output: 33.6 W at 56 VDC
Size — 1.4"H x 2.6"W x 5.5"D (1 x 6.6 x 14 cm)
Weight — 0.4 lb. (0.2 kg)
　

★★★★商品規格描述★★★★

Black Box Explains...Power over Ethernet (PoE)..

What is PoE?
The seemingly universal network connection, twisted-pair Ethernet cable, has another role to play, providing electrical power to low-wattage electrical devices. Power over Ethernet (PoE) was ratified by the Institute of Electrical and Electronic Engineers (IEEE) in June 2000 as the 802.3af-2003 standard. It defines the specifications for low-level power delivery—roughly 13 watts at 48 VDC—over twisted-pair Ethernet cable to PoE-enabled devices such as IP telephones, wireless access points, Web cameras, and audio speakers.

Recently, the basic 802.3af standard was joined by the IEEE 802.3at PoE standard, ratified on September 11, 2009, which supplies up to 25 watts to larger, more power-hungry devices. 802.3at is backwards compatible with 802.3af.

How does PoE work?
The way it works is simple. Ethernet cable that meets CAT5 (or better) standards consists of four twisted pairs of cable, and PoE sends power over these pairs to PoE-enabled devices. In one method, two wire pairs are used to transmit data, and the remaining two pairs are used for power. In the other method, power and data are sent over the same pair.

When the same pair is used for both power and data, the power and data transmissions don’t interfere with each other. Because electricity and data function at opposite ends of the frequency spectrum, they can travel over the same cable. Electricity has a low frequency of 60 Hz or less, and data transmissions have frequencies that can range from 10 million to 100 million Hz.

Basic structure.
There are two types of devices involved in PoE configurations: Power Sourcing Equipment (PSE) and Powered Devices (PD).

PSEs, which include end-span and mid-span devices, provide power to PDs over the Ethernet cable. An end-span device is often a PoE-enabled network switch that’s designed to supply power directly to the cable from each port. The setup would look something like this:

End-span device → Ethernet with power

A mid-span device is inserted between a non-PoE device and the network, and it supplies power from that juncture. Here is a rough schematic of that setup:

Non-PoE switch → Ethernet without PoE → Mid-span device → Ethernet with power

Power injectors, a third type of PSE, supply power to a specific point on the network while the other network segments remain without power.

PDs are pieces of equipment like surveillance cameras, sensors, wireless access points, and any other devices that operate on PoE.

PoE applications and benefits.
• Use one set of twisted-pair wires for both data and low-wattage appliances.
• In addition to the applications noted above, PoE also works well for video surveillance, building management, retail video kiosks, smart signs, vending machines, and retail point-of-information systems.
• Save money by eliminating the need to run electrical wiring.
• Easily move an appliance with minimal disruption.
• If your LAN is protected from power failure by a UPS, the PoE devices connected to your LAN are also protected from power failure.
　