That is correct,
And, if this is the behavior, please send a ticket into
cust...@packetflux.com with the serial number and your address and we'll
arrange an exchange. I'd like to see what is causing this.
On Thu, May 11, 2017 at 12:59 PM, Bill Prince <part15...@gmail.com> wrote:
> To be 100% clear....
>
> The negative sides (-) are common
>
> The positive sides (+) are independent.
>
> So we should be able to put different (+) voltages on PWR1 and PWR2, and
> we should not expect them to back feed each other.
>
> The behavior we were seeing was voltage from PWR2 was back-feeding through
> PWR1 and providing power to equipment that was on PWR1, even though the
> breaker to PWR1 was turned off.
>
> bp
> <part15sbs{at}gmail{dot}com>
>
>
> On 5/10/2017 4:27 PM, Forrest Christian (List Account) wrote:
>
> On the base unit, the - side of both DC inputs are tied together. It is
> designed that way, since it was designed to be powered from two positive
> sources.
>
> If you are connecting two -48VDC busses to the base unit by connecting
> 'common or return' to the + input on each, and the -48VDC bus to the -
> input on each, the base unit will internally connect both of those buses.
> As I described, this is by design because the unit was designed for +
> voltages, not negative ones.
>
> The next iteration of the base unit will handle this much more gracefully.
> I am not yet sure about whether the device will simply just support
> either +48VDC or -48VDC, or if you'll have to select it in some way (at
> ordering, with a jumper, etc....)
>
>
>
> On May 10, 2017 7:34 AM, "Sorin Esanu" <so...@evox.ro> wrote:
>
>> Yes, neg48 plant.
>> I’ll send the requested info.
>>
>> Thank you!
>>
>>
>> On 10 May 2017, at 16:32, Forrest Christian (List Account) <
>> li...@packetflux.com> wrote:
>>
>> If we're still selling the same version of a product, we warranty it.
>> We regularly replace things which are far older. I like to see the in
>> field failures so I can roll the lessons learned into the next generation
>> of products.
>>
>> Just send an email info cust...@packetflux.com with the serial (mac
>> address) and your address we'll send a ups label to ship it back to us.
>> Please include a note as to what is wrong so I can remember when I look at
>> it.
>>
>> Oh, one thing I just noticed. .. is this a positive ground plant by
>> chance? (I.E. -48)
>>
>>
>> On May 10, 2017 7:16 AM, "Sorin Esanu" <so...@evox.ro> wrote:
>>
>> We’re monitoring A and B of our DC power plant. It is wired directly into
>> the GMT fuses panel, A and B sides.
>> This particular unit was installed over 1 year ago, close to 2 years. If
>> your offer is still valid, let me know the procedure.
>>
>> Thanks!
>>
>> On 10 May 2017, at 10:32, Forrest Christian (List Account) <
>> li...@packetflux.com> wrote:
>>
>> Can you let me know more about your setup?
>>
>> Is this the unit you bought in November? (In case this is something
>> which has gone weird with a batch, and somehow not caught by our test
>> procedures).
>>
>> If you've got a defective one, we'll swap it, paying shipping both ways.
>>
>> On Tue, May 9, 2017 at 9:49 PM, Sorin Esanu <so...@evox.ro> wrote:
>>
>>> We’ve experienced this exact same behaviour last week. It seems like
>>> PWR1 and PWR2 are acting like one now.
>>> We are in process of replacing all the SiteMonitor II devices with Tycon
>>> TPDIN-Monitor-WEB2, which can monitor more things and it’s a lot smarter.
>>>
>>>
>>> > On 10 May 2017, at 01:31, Bill Prince <part15...@gmail.com> wrote:
>>> >
>>> > I think I have a SiteMonitor II with a problem, as I always thought
>>> that the two power sensors (PWR1 and PWR2) were independent of each other,
>>> and should have a pretty high impedance between then.
>>> >
>>> > We set up a new solar site, and put our load on PWR1 and the
>>> batteries on PWR2. As soon as we hook up either one of the sense wires, the
>>> breaker to the batteries (30 amp) pops, and all the lights go out.
>>> >
>>> > We can monitor one voltage on PWR1, or the same or different voltage
>>> on PWR2. However, if both are connected we blow the 30 amp breaker to the
>>> batteries.
>>> >
>>> > We've checked the polarity (both voltages are negative ground), and
>>> they are both "about" the same voltage (although we have monitored
>>> radically different voltage in the past (like 12V on one and 48V on the
>>> other). This is a 48VDC system, so we are seeing ~~ 56V on both right now,
>>> >
>>> > BTW, when we hook up just one of the sensors and leave the other open,
>>> we see ~~ 43 volts between PWR1 and PWR2. I haven't checked other
>>> SiteMonitors, but this doesn't seem right to me.
>>> >
>>> >
>>> > --
>>> > --
>>> > bp
>>> > part15sbs{at}gmail{dot}com
>>>
>>>
>>
>>
>> --
>> *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.*
>> Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
>> forre...@imach.com | http://www.packetflux.com
>> <http://www.linkedin.com/in/fwchristian>
>> <http://facebook.com/packetflux> <http://twitter.com/@packetflux>
>>
>>
>>
>>
>>
>
--
*Forrest Christian* *CEO**, PacketFlux Technologies, Inc.*
Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
forre...@imach.com | http://www.packetflux.com
<http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux>
<http://twitter.com/@packetflux>
