If I were spending 2k, I believe I would be looking at a rectifier based solution (from Emerson, Eltek, etc). Not only would it probably be a bit cheaper, but it would all fit in 1-2U of rack space.
On Mon, Jan 12, 2015 at 7:44 AM, David Milholen <[email protected]> wrote: > This is the portfolio I have used for 11 years.. > > http://duracomm.com/siteresources/apps/catalog/shop/prodView.asp?idproduct=495 > > http://duracomm.com/siteresources/apps/catalog/shop/prodView.asp?idproduct=174 > > http://duracomm.com/siteresources/apps/catalog/shop/prodView.asp?idproduct=180 > > http://duracomm.com/siteresources/apps/catalog/shop/prodView.asp?idproduct=349 > > I have used all of these stacked in several of our cabinets depending if > we are running ptp800 at that site. > The total cost for a +48v,-48v,2x 24v and distribution is around $1800 > and with batteries its about $2900 > Thats a full blown site. > If you just need +24v its about $1600 to $1800 depending if you need a > separate supply for isolating the routers and switches. > > Everything else I have ever tried or looked into is either too expensive > or doesnt last. > I have ever only replaced one 24v supply due to lightning which was a > direct hit on the system. > It let the smoke out :) > > > <http://duracomm.com/siteresources/apps/catalog/shop/prodView.asp?idproduct=349> > On 1/7/2015 9:57 AM, Ken Hohhof wrote: > > I wish everything would happily run on 29 volts like the Cambium stuff. > > Phoenix Contact has some DIN rail UPS gear that puts out regulated 24V > when on commercial power, but raw battery voltage when on batteries. So > what good is that? > > > *From:* Bill Prince <[email protected]> > *Sent:* Wednesday, January 07, 2015 9:51 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] 24V UPS > > Yes, there is temp compensation, but not that important to me with the > sites we're putting it in. The load is isolated from the batteries, which > is why it can do multi-stage charging (recovery/boost/float). However, > based on the literature, the load voltage will follow the battery voltage. > We do use a Traco to knock that down to 24V for some devices like MT and > UBNT. > > So I am trying these out. Will let the group know after I have some > experience with them. > > bp > <part15sbs{at}gmail{dot}com> > > > On 1/6/2015 7:56 PM, George Skorup (Cyber Broadcasting) wrote: > > What about temperature compensation? And is the output regulated or is it > essentially parallel operation and you get battery float voltage? I went > with the Traco because the temperature compensation is one thing that I > absolutely need. And I can handle the unregulated voltage with an RSD. For > smaller sites/micro POPs, now I'm just throwing in Mean Well AD-155's. No > temp. comp. but I'm not all that worried about those because they're not > supporting hundreds of $$ worth of batteries that I'd like to last. So far > they have not severely overcharged batteries like the APC UPS's do in only > a few months, so I'm happy with that. > > On 1/6/2015 5:04 PM, Bill Prince wrote: > > We just got a couple of the 24V versions and it was only $300 each. About > the same as the Traco for the two separate units. I sure appreciate the > differences, but I was looking for extra-small form factor on a DIN rail. > Because this site is on AC power 99.99% of the time, it's not a big deal > (to me) if it takes 24 or even 48 hours to get a full charge. IIRC, these > units also have LVD. > > bp > <part15sbs{at}gmail{dot}com> > > > On 1/6/2015 10:26 AM, George Skorup (Cyber Broadcasting) wrote: > > Those are really expensive. A Traco TSP+BCM is several hundred less at > almost every wattage, last time I looked anyway. I like the split power > supply and battery module. A lot cheaper to replace a failed component than > an entire $700-1k all-in-one. But that's just me. The Traco gets you > temperature compensated charging and LVD. You get contacts for DC input OK, > batt OK/fail, etc. Hook that up to a SiteMonitor switch closure module and > you have pretty good remote visibility. Put shunts wherever you want to > monitor, battery charge/discharge current, output rail current, etc. > > On 1/6/2015 10:49 AM, Bill Prince wrote: > > Try these. We are about to install a couple of them. Some models have > ethernet ports for a GUI (no SNMP :-( ). But they do have contacts to send > alerts through a SiteMonitor (for example). > > http://www.altechcorp.com/power/CBI-UPS.html > > On Tue, Jan 6, 2015 at 8:23 AM, Christopher Tyler < > [email protected]> wrote: > >> I'm at my end. I've been looking at this for a while now and it's obvious >> that no one makes an industrial APC UPS that works. >> >> We've tried the Alpha Cordex (DIN rail) and the ICT (19" rack) and >> neither one can do what a APC management card can. We just need it to >> provide 24vDC to a load and when the AC power goes out, send an alert and >> let us monitor the system status via SNMP. >> >> Alpha: >> PROS: DIN rail mounted >> CONS: Web interface is IE only, SNMP requests are completely broken, have >> not tested SNMP traps, cost is about $700. >> >> ICT: >> PROS: It works well as a dumb power supply/charger with UPS >> functionality, web interface works in all browsers. >> CONS: SNMP is limited to about 6 values, all remote communication is lost >> when AC is removed, no battery monitoring at all other than the voltage for >> use with LV cutoff which is one of the values that is not available via >> SNMP. Also costs about $700 >> >> I have to give it to Alpha at this point, at least their unit remains >> "intelligent" when AC power is removed. If they would fix their web >> interface and SNMP it would be perfect. >> >> So... Does anyone have a solution that works that isn't completely >> cobbled together? I need to know when we lose/regain AC power, that the >> battery is draining, what the battery voltage is so that I know when it's >> about to cut off, it needs a LV cut off to protect the batteries, and all >> this information needs to be available via SNMP and web. Am I asking for >> too much or does something of this nature exist outside of TrippLite and >> APC? >> >> -- >> Christopher Tyler >> MTCRE/MTCNA/MTCTCE/MTCWE >> Total Highspeed Internet Services >> 417.851.1107 >> >> > > > -- > -- > bp > part15sbs{at}gmail{dot}com > > > > > > > -- >
