Yeah, 40 to 56 should work for all 48 volt gear. Some of it may not like 40 but in my experience they will stay functional down to 44.
From: Adam Moffett Sent: Wednesday, June 19, 2019 4:21 AM To: af@af.afmug.com Subject: Re: [AFMUG] UPS and DC to DC conversion Meanwell RSD-300C-48 makes a 48V output from any input from 33-62v. Up to 6A output. Maybe the Ubiquiti switch you mention is special in some way, but in my experience the 48v and 54v equipment are really the same thing. Voltage varies for any number of reasons, so the device should have an upper and lower bound of acceptable voltage, and if something is stated to be "48v" or "54v" you tend to find deeper in the specs that they're both accepting a range from 40 something to 50 something. On 6/19/2019 1:19 AM, Sterling Jacobson wrote: Having a hard time figuring out the exact part/price for something like this. Which Meanwell part would take 48v and make it 50v or 54v 5A? From: AF mailto:af-boun...@af.afmug.com On Behalf Of Adam Moffett Sent: Tuesday, June 18, 2019 10:21 PM To: af@af.afmug.com Subject: Re: [AFMUG] UPS and DC to DC conversion That's weird to me. Any telecom equipment made for 48v I would have assumed they intended it to be used with a rectifier, and consequently I would assume it'd be ok up to at least 56v continuous; and maybe more like 60-70v for a short duration. But yeah, DC-DC converter is the fix. On 6/18/2019 11:36 PM, Sean Heskett wrote: You need to use a DC-DC converter for sensitive equipment like that. Meanwell has a good selection. On Tue, Jun 18, 2019 at 8:12 PM Sterling Jacobson <sterl...@avative.net> wrote: Apparently the UBNT EP-S16 freaks out if it goes above 54v. Is there any way to assure it doesn’t float/charge above 54v, or maybe even just 50v? From: AF <af-boun...@af.afmug.com> On Behalf Of TJ Trout Sent: Tuesday, June 18, 2019 7:26 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] UPS and DC to DC conversion contact talley or tessco for a price, don't trust what you see on google, it's like 50% less On Tue, Jun 18, 2019 at 6:25 PM TJ Trout <t...@voltbb.com> wrote: all 48v systems for battery power will float at 54v, it's also adjustable via the battery chemistry On Tue, Jun 18, 2019 at 3:33 PM Sterling Jacobson <sterl...@avative.net> wrote: Ok, cool. So can the 7bc2 be adjusted slightly to output 50v instead of just 48v? There will be some loss going 100’ or so, right? From: AF <af-boun...@af.afmug.com> On Behalf Of TJ Trout Sent: Tuesday, June 18, 2019 4:23 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] UPS and DC to DC conversion 12-54v is inefficient, if you want 200ah of battery use 4x50ah batteries for a 48v string ICT24048-7BC2 360W 54v AC-DC + LVD + Charger ICT-TMP - Temp sensor for charge compensation if batt's outside ICT-WMB - Wall mount bracket SITE Monitor - Voltage monitoring Or Alternativly; 48v din mount PSU 48v 'dc ups' to charge batt's and provide LVD OR 48v din 'dc ups' with integrated psu + lvd + charger (i.e. DIN-UPS 48-5 cheaper options available) On Tue, Jun 18, 2019 at 2:50 PM Sterling Jacobson <sterl...@avative.net> wrote: I’m trying to put a “box” system together for our house POP sites and need help with the DIN stuff and UPS. Can you guys give me an idea or example of the following? I want to take standard AC 15A in from a breaker outside the box. And using maybe one or two 12v 105AH AGM batteries, supply 50v 6A up the side of the house. I have never ordered DIN parts like this, guess I don’t have to use DIN, but would be nice. Having a problem finding a DC to DC converter that takes 12v and upconverts to 50v 5-6A. Is this the cost effective method? Something like this: Monitoring Sitemonitor Base Unit II SMON Base II 1.00 $100.00 $100.00 UPS Monitor Sitemonitor Int MorningStar MeterBus SMON MorningStar 1.00 $60.00 $60.00 UPS Charge MorningStar Sunsaver Dual 1.00 $165.00 $165.00 Battery AGM Deep Cycle 105AH NPP FT12-105AH 2.00 $225.00 $450.00 DIN Parts like DC fuse/breakers and trunk stuff 1.00 $100.00 $100.00 DC 12v to 50v 5A 1.00 $150.00 $150.00 -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
