Download Ff Injector
Heidi Blessing
I have a WAX630 with the most recent firmware and I am attempting to find a compatible POE++ injector. I have tried an Ubiquiti POE-50-60W ( -accessories/products/unifi-poe-adapters?variant=4028558242620...) which says it supports POE++ and 60 watts of power but the WAX630 is saying it is in AF power source mode and not AT mode. Does anyone have any experience with this issue?
Provide exact model numbers please. What I see on the other vendor spec sheet as POE-50-60W, POE-50-60W-WH is very likely some kind of non-standard compliant passive power-over-ethernet injector. My distributor does misleadingly state for the "PoE Injector POE-50-60W 50 Volt GE 60 Watt" it is a PoE Standard "50V passive PoE". "PoE Standard" - i would like to cry out loud. This is proprietary junk!
I bought a Ubiquiti 802.3at injector ( -accessories-poe-injectors/products/u-poe-at) but it only puts out 48V... so the AP is running in reduced power mode. Netgear support says the Ubiquiti injector isn't actually AT compliant because the AT standard is 50V+ (they seem to be correct!).
The original Ubiquiti PoE+ injector (U-POE-at) puts out 48V / 30W - which should meet the 802.11at standard for power at the powered device (42.5V) but doesn't meet the standard (50V) for output at the power source. Why that matters to the AP is a little beyond me, but I'm no engineer, so for now I'm just going to use the TP-Link injector.
A parent instance (x calls up) does inject these dependences and as a solution I could pass them along, but I feel there must be a more elegant solution to this. So my actual question is: Is there a way in Play 2.8 to retrieve the injector instance that is used by the application?
Maybe I am missing something very simple, I am rather new to Play and Guice DI, so any help would be greatly appreciated. All the solutions that I found online refer to older versions of play, which do allow direct access to the injector or application objects. The examples from play 2.8 also show how to retrieve the injector, but only in the context of (unit) testing. Also, it is written primarily in Java, rather than Scala.
You're using the inject function wrong. As the documentation states, the inject function already instantiates a new instance of $injector. My guess is that by passing $injector as a argument to the inject function you are asking it to instantiate the $injector service twice.
I tried a 24v DC 0.5a TP link injector (TL-POE2412G) and it doesn't power up the camera, on further investigation it's because the doorbell requires an Active POE injector rather than a passive one.
The TL-POE150S can be had for cheap, I trust the TP Link brand and the size of the device will fit where I need to put it, and even though it is technically a 48v DC Poe injector it is meant to "auto negotiate" the power requirements of the device, which I presume is the "active" part?
I have a PTZ Security Camera that requires PoE+ (PoE class 4, IEEE802.3at). It requires 30 watt. I have an existing switch that only provides standard PoE/PSE 802.3af at a max of 15.4 watts. My question is whether I can us a PoE Injector such as the Veracity Outsource Plus POE+ injector in line to power my camera? In my proposed configuration, the Ethernet cable would come out of the existing standard POE Switch (15 watt max), through the POE plus injector and on to the camera. Would this cause too much wattage in the line since the switch that is upstream of the POE injector is POE also? Thank you!
Yes, you can use an appropriate (ie. camera-compliant) injector even if the switch already provides PoE. If the injector has two identical sockets (instead of a socket and plug) be VERY careful to connect the unpowered socket to the switch, not the other way around, because you may blow the switch and the injector.
Every injector is basically an isolation transformer with central taps on one of the sides to inject DC, so even if you place 5 injectors in series, only the last one will really inject DC to the cable. If you then place 5 "receive" injectors in series on the same cable, only the first one will provide power, the rest will not be powered.
An injector is a system of ducting and nozzles used to direct the flow of a high-pressure fluid in such a way that a lower pressure fluid is entrained in the jet and carried through a duct to a region of higher pressure. It is a fluid-dynamic pump with no moving parts except a valve to control inlet flow.
The steam injector is a common device used for delivering water to steam boilers, especially in steam locomotives. It is a typical application of the injector principle used to deliver cold water to a boiler against its own pressure, using its own live or exhaust steam, replacing any mechanical pump. When first developed, its operation was intriguing because it seemed paradoxical, almost like perpetual motion, but it was later explained using thermodynamics.[1] Other types of injector may use other pressurised motive fluids such as air.
Depending on the application, an injector can also take the form of an eductor-jet pump, a water eductor or an aspirator. An ejector operates on similar principles to create a vacuum feed connection for braking systems etc.
The injector was invented by Henri Giffard in early 1850s and patented in France in 1858, for use on steam locomotives.[2] It was patented in the United Kingdom by Sharp, Stewart and Company of Glasgow.
Strickland Landis Kneass was a civil engineer, experimenter, and author who became president of the Pennsylvania Railroad in 1880, following many other accomplishments involving railroading.[4] Kneass began publishing a mathematical model of the physics of the injector, which he had verified by experimenting with steam. A steam injector has three primary sections:[3]
The injector consists of a body filled with a secondary fluid, into which a motive fluid is injected. The motive fluid induces the secondary fluid to move. Injectors exist in many variations, and can have several stages, each repeating the same basic operating principle, to increase their overall effect.
The compression ratio of the injector, P 2 / P 1 \displaystyle P_2/P_1 , is defined as ratio of the injector's outlet pressure P 2 \displaystyle P_2 to the inlet pressure of the suction fluid P 1 \displaystyle P_1 .
The entrainment ratio of the injector, W s / W m \displaystyle W_s/W_m , is defined as the amount W s \displaystyle W_s (in kg/h) of suction fluid that can be entrained and compressed by a given amount W m \displaystyle W_m (in kg/h) of motive fluid.
The steam-cone minimal orifice diameter is kept larger than the combining cone minimal diameter.[10] The non-lifting Nathan 4000 injector used on the Southern Pacific 4294 could push 12,000 US gallons (45,000 L) per hour at 250 psi (17 bar).[11]
The lifting injector can operate with negative inlet fluid pressure i.e. fluid lying below the level of the injector. It differs from the non-lifting type mainly in the relative dimensions of the nozzles.[12]
An overflow is required for excess steam or water to discharge, especially during starting. If the injector cannot initially overcome boiler pressure, the overflow allows the injector to continue to draw water and steam.
There is at least one check valve (called a "clack valve" in locomotives because of the distinctive noise it makes[6]) between the exit of the injector and the boiler to prevent back flow, and usually a valve to prevent air being sucked in at the overflow.
Efficiency was further improved by the development of a multi-stage injector which is powered not by live steam from the boiler but by exhaust steam from the cylinders, thereby making use of the residual energy in the exhaust steam which would otherwise go to waste. However, an exhaust injector also cannot work when the locomotive is stationary; later exhaust injectors could use a supply of live steam if no exhaust steam was available.
Injectors can be troublesome under certain running conditions, such as when vibration causes the combined steam and water jet to "knock off". Originally the injector had to be restarted by careful manipulation of the steam and water controls, and the distraction caused by a malfunctioning injector was largely responsible for the 1913 Ais Gill rail accident. Later injectors were designed to automatically restart on sensing the collapse in vacuum from the steam jet, for example with a spring-loaded delivery cone.
Another common problem occurs when the incoming water is too warm and is less effective at condensing the steam in the combining cone. That can also occur if the metal body of the injector is too hot, e.g. from prolonged use.
An additional use for the injector technology is in vacuum ejectors in continuous train braking systems, which were made compulsory in the UK by the Regulation of Railways Act 1889. A vacuum ejector uses steam pressure to draw air out of the vacuum pipe and reservoirs of continuous train brake. Steam locomotives, with a ready source of steam, found ejector technology ideal with its rugged simplicity and lack of moving parts. A steam locomotive usually has two ejectors: a large ejector for releasing the brakes when stationary and a small ejector for maintaining the vacuum against leaks. The exhaust from the ejectors is invariably directed to the smokebox, by which means it assists the blower in draughting the fire. The small ejector is sometimes replaced by a reciprocating pump driven from the crosshead because this is more economical of steam and is only required to operate when the train is moving.
An empirical application of the principle was in widespread use on steam locomotives before its formal development as the injector, in the form of the arrangement of the blastpipe and chimney in the locomotive smokebox. The sketch on the right shows a cross section through a smokebox, rotated 90 degrees; it can be seen that the same components are present, albeit differently named, as in the generic diagram of an injector at the top of the article. Exhaust steam from the cylinders is directed through a nozzle on the end of the blastpipe, to reduce pressure inside the smokebox by entraining the flue gases from the boiler which are then ejected via the chimney. The effect is to increase the draught on the fire to a degree proportional to the rate of steam consumption, so that as more steam is used, more heat is generated from the fire and steam production is also increased. The effect was first noted by Richard Trevithick and subsequently developed empirically by the early locomotive engineers; Stephenson's Rocket made use of it, and this constitutes much of the reason for its notably improved performance in comparison with contemporary machines.
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