Micropack made me cry when I saw what it cost.
Have you looked at Eltek and Emerson? Although Eltek seems to be
oriented around –24 or –48, and not so good for +24. Not familiar
with Emerson, Mark Radabaugh has posted they use them.
I have an Eltek Micropack –48V system and the web and SNMP capability
is excellent. I did have one rectifier module fail, but it was pretty
painless given they are N+1 redundant.
*From:* Gino Villarini <mailto:g...@aeronetpr.com>
*Sent:* Tuesday, January 06, 2015 1:15 PM
*To:* mailto:af@afmug.com
*Subject:* Re: [AFMUG] 24V UPS
The problem with xl units it's the charger ... It has low amperage
(5-8 amps dep model) and don't maintain well big banks
The idea is to have the xl with internal batt and have a big bank
connected to the external batt connector
This bank will be isolated from the apc during AC operation. The bank
will have a good charger and will run 24 dc loads(still under
consideration)
AC fails, the apc ups will see the big bank for extended runtimes
Gino A. Villarini
@gvillarini
On Jan 6, 2015, at 2:51 PM, Josh Baird <joshba...@gmail.com
<mailto:joshba...@gmail.com>> wrote:
Hmm, give us details when you get them regarding the XL!
Josh
On Tue, Jan 6, 2015 at 1:45 PM, Gino Villarini <g...@aeronetpr.com
<mailto:g...@aeronetpr.com>> wrote:
Chris
Thanks for this compressive evaluation. We bought 2 Alpha/Cordex
unit for testing. We are in a similar spot, looking for a web
managed power system in 24 and 48 vdc.
You saved us the expense of buying an ICT unit.
That being said, we are looking into using a slightly modified
apc xl unit to run 24 dc direct from the UPS DC rail
Gino A. Villarini
@gvillarini
> On Jan 6, 2015, at 12:24 PM, Christopher Tyler
<ch...@totalhighspeed.net <mailto:ch...@totalhighspeed.net>> 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 <tel:417.851.1107>
>
