ON/OFF two power supply at a time

I need to know that how to ON/OFF two lambda power supply at a time (one switch) configured as a +/- supply
"Thanks with regards "
by
..........Gireesh..........

Please keep your discussion to ONE thread. All details are in the other thread. All that you accomplish by starting a new thread is to irritate people by causing them to ask you for the details, which already exist in the other thread. Most folks don't work on the weekend and this is a community of volunteers. Please learn some patience. Thank you.

Similar Messages

  • ISR 4451-x power supply 4500W holdup time

    Hi, folks.
    I'm experiencing an issue with an automatic transfer switch (AP7723) and the ISR 4451-X power supply.
    When switch is transferring a power the ISR is falling to restart process (with no correlation if one or two power supply installed).
    Recent specification for the ATS says that a maximum transfer time is 18ms, typical time 8-12ms
    I couldn't find any reference for the holdup time for the power supply PWR-4450-AC, only those for the 4500 series (http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/hardware/catalyst4500e/installation/guide/Eseries/0aspecs.html)
    Please, advice
    Thanks in advance,
    Vitaliy

    Hi, folks.
    I'm experiencing an issue with an automatic transfer switch (AP7723) and the ISR 4451-X power supply.
    When switch is transferring a power the ISR is falling to restart process (with no correlation if one or two power supply installed).
    Recent specification for the ATS says that a maximum transfer time is 18ms, typical time 8-12ms
    I couldn't find any reference for the holdup time for the power supply PWR-4450-AC, only those for the 4500 series (http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/hardware/catalyst4500e/installation/guide/Eseries/0aspecs.html)
    Please, advice
    Thanks in advance,
    Vitaliy

  • I'm using a macbook pro 2011 15",while i was charging it,i accidentally switched off the power supply while it is half way charging,will the battery get damaged if charging got interupted and switched on and off?

    i'm using a macbook pro 2011 15",while i was charging it,i accidentally switched off the power supply while it is half way charging,will the battery get damaged if charging got interupted and switched on and off?

    you are welcome

  • Spontaneous Shut-off problem (power supply?)

    Hi-- I have a first generation G5 iMac.
    Last year, there was about a week in which it would spontaneously shut off. I read there were possibly some power supply issues with the early units, so I took it in to an Apple Store hoping they would diagnose such a problem and fix it; they ran it for a couple hours, said there were no problems, and sent me home. Over the last month, it has started happening again, and has happened at least seven times. I do regular backups and I've been lucky, but I know one of these days it's going to happen while I'm doing something important. I wouldn't mind taking it back to the Apple Store, but it's not an easy trek, and it happens so unpredictably that I think the odds of getting it to do it at an appointed time is slim, in which case I'm afraid they're just going to send me home again.
    Just wanted to know if anyone else has dealt with such a problem, what the fix was, and how I might convince the tech guys to delve a little deeper even when they don't actually witness the event.
    Thanks,
    dave

    Miriam--
    Dave, if, in fact,as Charlie suggests, the cause of
    your shutdowns is a variable power supply, it should
    easily be cured by the addition of a Universal Power
    Supply
    While an excellent idea (I wouldn't have a computer without connecting it to a UPS any more), a UPS won't necessarily solve the problem of the unexpected shutdowns. My iMac was on a UPS and it still would shut down.
    There are two kinds of UPSs. The most common is a battery backup. Most of the time, the computer is actually getting power from the mains. If the UPS detects a failure of the mains, it'll switch to providing the computer with battery power. But there will be a very small fraction of a second where there will be not power at all supplied to the computer. If the computer's power supply is healthy, it should be able to bridge that tiny interruption until it starts getting power from the UPS. But if it's not healthy enough, the computer will shut down.
    The second kind of UPS is what you are describing, where the UPS provides power to the computer at all times. These aren't as common, though, and are more expensive. I'm not sure if APC even sells this kind. At least, I couldn't find any at their web site that I could be sure were this kind.
    When I had the shutdown problems with my iMac, I initially thought it might be a problem with the UPS, since the iMac would shut off if the power was interrupted long enough for the UPS to notice. I could easily test it by just pulling the plug going to the UPS. Earlier, I had been able to do that without problems in order to test a script I was writing to shut down the computer in case the of a power failure (for some reason, the software built into OS X to do this wasn't working right).
    But when I was having the shutdowns, the iMac would shut off right away as soon as I pulled the plug on the UPS. Luckily, I was able to test my UPS at work on another computer and try a UPS from work on my computer and rule out the UPS. Now that my power supply unit has been replaced, the iMac will once again survive the switch from the mains to the UPS's battery.
    charlie

  • How can I replace the power supply IN the time capsule

    I have a TimeCapsule that has a bad powersupply. I have opened the timecapsule to confirm this. Has anyone done this before? If so, where did the power supply come from? Cost? I took this to the Apple Igneous bar and they said there is nothing that can be done about it.They said it couldn't even be opened, but simply peeling the rubber bottom off and unscrewing a number of tiny screws and that's it. The 1 TB drive is LOOSE in there. That was a bit of a surprise. I had thought that the issue was the drive itself was bad. I had hoped that if I removed that the AP part would at least work, but after opening it up and firing it up I could hear that the power supply was buzzing thus the conclusion it was the issue.
    I am going to put the SATA drive in a reader to see that it is indeed ok. If that checks out, then I know for certain it is the power supply, but I don't know what to use as a sub since the unit needs both 12V and 5V. I'd just as soon find a good supply and use that. Any help would be appreciated.
    Thanks,
    John A Kostelac

    What version is your TC.. A1xxx from the rubber foot?
    Power supplies are not available from apple. They do not consider it repairable. It is a sealed consumable.
    Power supplies are available from ebay.. simply type time capsule power supply into search.
    This is absolutely standard issue that has been ongoing for ages and ages.
    See https://sites.google.com/site/lapastenague/a-deconstruction-of-routers-and-modem s/apple-time-capsule-repair
    For a multitude of ways to fix it.
    The 1 TB drive is LOOSE in there.
    No, it is not loose, it has rubber mounts with pins in the bottom base plate. You cannot see the mount points with the base off. This is standard hdd mount for low noise and vibration.
    I had thought that the issue was the drive itself was bad.
    Drives seldom are the problem. The Gen2 WD black has been less than great though.. and later spinpoint in Gen3 not so good.
    Apple Igneous bar  

  • Power supply stopped giving time left

    Hi there,
    My power supply "thing" in the upper right corner of my screen stopped telling me how much time I have left when the powercord is in or out. It now simply says " not loading" and even when I put the powersupply on it will say the same thing while it is in fact loading. (I know since my notebook doensnt shut off then)
    I had this problem a year ago and there was a trick for it to make it work normally again, anyone any ideas?
    Its not the biggest problem, but it is really annoying not knowing how much time you've got left!
    Thanks!
    Dientje

    You could control- clicking on the battery menulet in the upper right and try changing the display setting>show> ex percentage and change back.
    You can try relaunching the menu extras in terminal,  copy and paste:
    killall SystemUIServer
    If that does not jump start,  it could be corrupt plist.  Try moving to the desktop or deleting the
    com.apple.systemuiserver.plist  found here youruser/Library/Preferences/com.apple.systemuiserver.plist
    followed by
    killall SystemUIServer
    this rebuilds the plist  and relaunches the menu extras

  • How do I programmatically turn on/off the power supplied by a PoCL supported NI framegrabber?

    I'm developing a user interface vi for a camera that uses the Camera Link protocol. The camera is powered via the cable to the framegrabber (PCIe-1433). Since there is no power button on the camera, the user has to unplug the cable in order to turn off the camera, causing potential ESD hazards. Is there a way to turn off the PoCL feature so that the user can safely turn off the camera? The only workaround I could think of is closing the IMAQ camera interface and loading a new one that uses a different camera file, which is the same as the first but does not include the tag for supporting PoCL. Are there any more elegant or straightforward solutions available through NI-IMAQ vi's?
    Thanks.

    Hi ArtN,
    Unfortunately the mechanism used to enable/disable the PoCL feature is marked as being available only at initialization time of loading the camera file, which is why that is the only place that can enable/disable it.
    The workaround you came up with is likely the most "elegant" I can come up with as well. It would be interesting to hear more about your use case of turning off the camera independently of the PC to see if there is additional functionality we should be providing to satisfy it. Additionally, I'm curious about the ESD concerns you have about removing the cable. We plug/unplug CameraLink cameras all the time and I can't say I've ever heard of a board or camera being damaged by that process.
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  • Replacing Time Capsule Power supply

    Does anyone know of a place to replace the power supply on a Time Capsule?

    https://sites.google.com/site/lapastenague/a-deconstruction-of-routers-and-modem s/apple-time-capsule-repairers
    You can order a kit and diy.. not that hard.
    But there are no replacements for the original power supply.. Apple refuse to supply any parts for the TC. It is a sealed unit that is a consumable.. (in their opinion.. not mine).

  • Where can I buy a replacement power supply?

    Where can I buy a replacement power supply for my time capsule?

    Apple do not sell parts for the TC..
    And do not allow their OEM to sell parts.
    So you need to bypass Apple and create your own.
    Or fix the existing one.
    https://sites.google.com/site/lapastenague/a-deconstruction-of-routers-and-modem s/apple-time-capsule-repair

  • Can't fine internal power supply form new sound card

    Just installed  an asus xonar dx sound card in my slimline s5670t desktop. The problem I am having is that I cannot find the 4 pin power supply I need on the mobo. Can anyone help me out?
    This question was solved.
    View Solution.

    These are the motherboard specifications for your PC.
    You probably need to look for a 4 pin molex  or floppy connector coming off the power supply.  If your don't see a spare connector then you will need an adapter to split off from a molex connector or even off a sata power connector.  Look carefully at the power cable going to the hard drive.  This is where you might try a Y splitter power cable.  www.newegg.com probably has want you need.
    Maybe this adapter would work.  I can't say if the connector is right for tapping on the sata drive for power or if the cable lengths are long enough.
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  • MacBook Pro (MC118) power supply problem

    Hello.
    I have MacBook Pro (MC118). I'm using two power supply (home, work).
    Yesterday I noticed, that macbook does not charging up. So i decided that my power supply is broken. Found another at work (from my old macbook) and used it.
    But when I got home and tried to use power supply (original supply that comes with my MBP) I was surprised. It doesn't work at all.
    So today I tried another power supplies at work (from few other MPB) and they all doesn't charging my MPB! 
    And now I have only one power supply, that actually can charge my battery.
    What is wrong with my MPB?
    Thanks! 

    Yes, it's strange! Only one charger works for this laptop.
    And unfortunately it's hard to use warranty in my country (Ukraine)

  • Catalyst 2955T-12 Power Supply n IGMP Snooping

    Hello everyone,
    I have Two Catalyst 2955T-12 switches, on this switch there are Two Power Supply (DC) options...I want to implement redundant Power Supply solution, can this Two DC Input on Switch will give this solution or I have also external Din Rail power supply...my question is how I can implement redundant power supply so that if one PS of switch fails then automatically other will start?
    Also can any body tell me what IGMP snooping do? do I need to configure it? also the command (I need global command as well as port/interface based command)?
    Regards,
    Shahid

    For the power redundancy question, I believe this link will help:
    http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea2/2955hig/hginstal.htm
    Also can any body tell me what IGMP snooping do? do I need to configure it? also the command (I need global command as well as port/interface based command)?
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    The multicast router sends out periodic IGMP general queries to all VLANs. When IGMP snooping is enabled, the switch responds to the router queries with only one join request per MAC multicast group, and the switch creates one entry per VLAN in the Layer 2 forwarding table for each MAC group from which it receives an IGMP join request. All hosts interested in this multicast traffic send join requests and are added to the forwarding table entry.
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  • K8N Neo4 Platinum SLI power supply connection

    I was wondering if the power connection type to the motherboard mattered.  Does it need to be a 24 pin connection like what is on the board or would just a 20 pin connection, possibly with the other 4 pin connection along side it, be efficient at powering this board?

    Quote from: bluesky_2005 on 14-April-05, 22:55:00
    Hi,
    I've notices that loads of people have an issue with power supply & SLI systems (AMD 64). It seems there is no ideal solution yet 
    Actually there are very good solutions, but many don't purchase the correct power supply at the time of the pruchase of their SLI motherboard.    Same problem occured with users transitioning to Pentium III processors and the use of the old 250 Watt power supplies.
    We just like to hold onto our parts as long as possible.    Going with one of the supplies listed on http://www.SLIZONE.com will usually be a safe bet.
    As to using the 20 pin connection instead of the 24pin, many have reported that it works.   The additional pins are providing better amp support to the parts that need it, so I would consider a 20 pin without an adapter temporary.   For a $7.00 part fix, it's worth it.
    The point is that the copper traces on the motherboard may eventually fail if there is significant current demands and only the 20 pin is used, hasn't happened yet, but it's possible.   The gauge wire used for the PSU though is more than sufficient in comparision, so that's why an adapter will help protect your motherboard investment.

  • Power supply vs. logic board?  turns off in sleep mode.

    My imac g5 (2004 - 1st generation?) is either turning completely off or going into some un-wake-up-able mode after it's put to sleep. (I have to switch off/on the power strip and turn the computer on all over again.) And sometimes if it's sleeping (power light pulsing on front) it may or may not wake from sleep by pushing the power button. Often touching a key in that circumstance will cause it to crash, so I've quit using that altogether as a method of waking it up. I've reset the SMU a number of times throughout the past few months and it has not cleared up this problem.
    Last night after I put it to sleep it switched in to the un-wake-up-able mode. I could still hear something running (not a fan, just an electrical hum) where it seems like it's crashed and can't shut itself off. I had to turn off the power and try to turn the computer back on. It wouldn't respond the first couple times. Then the power light glowed for a while but it still didn't turn on completely. After a few more minutes I tried again. Maybe I held the power button for too long, but I heard a long single beep, the fans whirred, and then everything started up as usual.
    I've read a number of threads seemingly related to these issues, but am now not clear about whether this is a power supply issue or a logic board issue. I have yet to open the back and check for bulging capacitors. Just thought I'd ask here first.

    I am having a very close issue too (posted also in a more recent thread about power button not functioning). My old iMac G5 20 inches got a power supply that went bad two years ago. I had it replaced and all went fine until two weeks ago.
    My wife was using it, while I was away: machine shut down with a 'pop!' sound.
    She tried to start it up again, but after pressing the button a couple of times - the last one longer - she had a long strong peep. The machine went on for a while and then off again. Scared, she left it off.
    After checking, no reported issue seems to fit to the problems shown: power supply is working; logic board too. The machine is working fine, but on sleep, it dies out. While doing tasks, at undetermined times, it shuts down with a 'pop!'. Sometimes you can restart it immediately. Sometimes you can't and have to wait one or more hours. No evidently bad caps on board, led check returns 1 (no 2 flashing or attempting to turn on) with dead computer, otherwise all working fine. Hardware test also passed. Console messages have nothing relevant or clearly understandable to offer.
    Still can't figure out a solution. Many user are pretty fast in suggesting to bringing the machine to Apple. Unfortunately not all around the world we have/need cars. And getting the 20 kg of iMac by feet/metro to the shop it ain't such a nice walk. When I fried the power supply, there was no sufficiently large box on sale to pack the computer and have it send to the shop. I had to wait for the technician - on a convenient day - do drop by and take it (and he knew he was going to repair it)!
    Will post, if I have further developments.

  • Power Supply blows a fuse, Ext Soundcard power outages, Time Machine.

    Power Supply blows a fuse, Ext Soundcard momentary power outages. Time Machine won't backup.
    Ok here's my setup
    Mac Book Pro 13" APRIL 2011 latest firmware. 8GB RAM. Surge Protected mains connection..
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    The M-Audio has 2 x Firewire Ports and I take one  to a 2TB 7800rpm Iomega iMedia Drive which daisy chains to a 1TB FireWire Seagate HardDrive and yes both are Pre Powered and formatted for Time Machines exclusive use.
    The M-Audio Firewire module can be pre powered but isn't for this reason, the FireWire Out from the Mac IS pre powered, and I'm using a good quality NEET lead that powers the Audiophile ok over the last few months. I have been warned by the manual if I add a power supply to a pre powered firewire chain I could damage equipment, I'm now running the the screen as low as possible and the backlit keys off to minimise power drain, I also use an Acer 24" Monitor with a NEET DV mini port to HDMI adaptor and it's been working great but this must be more power drain on the power supply, One of the USB ports goes to an Native Instruments Maschine Sampler Module, the other goes to a Pre Powered 4 Port USB Hub and that has been fine, it has 1 Axiom 25 USB Midi Keyboard, 2 Pre Powered Hard Discs 1 Portable USB Drive. Now the problems started with Time Machine it can't backup and I get Hard Disk Unsafe Disconnects and Failed Time Machine Backups and Now my Soundcard does the same in that it momentarily disconnects and reconnects in a second, in Settings under ENERGY SETTINGS I've set hard drives to Never Shut Down, and the Screen also, it's been more frequent, then a fuse blows in the Power Supply without tripping up my Surge Protector Socket pfft! just great, well it is only a 3AMP Fuse in the Plug Socket but it saved my MacBook!, ok checks Mains, yes it's old, and I've started using the Central Heating alot now and when it turns on it could be causing a power surge, same with the FridgeFreezer. Things i've tried, on the Seagate pre powered FireWire Hardisc I have switched the Firewire lead to its second FW port, I got no errors with Time Machine this time, not 100% it's done yet, Soundcard resets in Logic 9 ****, I do have 2 lower quality Firewire Leads that go from the Soundcard to the 2 harddrives will need upgrading ASAP, thats next, I recon its time to upgrade the Soundcard as well for a Focusrite or similar as all my M-Audio Soundcards would literaly loose there minds on PCs and Macs, flakey drivers would just drop out of the Audiophole Firewire Card, more than I care to mention, so if that happens it could explain why the Time Machine drive drops out also, hmmm, and there was me thinking if I used a Mac it would all be ok. wrong. Would apreciate any qualified input, thanks.

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