I think it draws current from whichever port has the higher voltage.
If you did +24 and -48 I bet that would be bad.
------ Original Message ------
From: "Chuck McCown" <[email protected]>
To: [email protected]
Sent: 3/20/2017 1:09:30 PM
Subject: Re: [AFMUG] Sitemonitor question - different voltages
I am talking about pwr1 and pwr2. For some reason I thought they had
to both be the same.
From:Josh Luthman
Sent: Monday, March 20, 2017 11:08 AM
To:[email protected]
Subject: Re: [AFMUG] Sitemonitor question - different voltages
Of course. You'll also be able to monitor both at the same time.
Conversely an RB750 will only report the highest of the two voltages.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Mar 20, 2017 at 1:01 PM, Chuck McCown <[email protected]> wrote:
Can you mix 24 and 48 volts on the same unit?
From:Josh Luthman
Sent: Monday, March 20, 2017 10:58 AM
To:[email protected]
Subject: Re: [AFMUG] Sitemonitor question - different voltages
Base1 has been gone for like 3-4 years or something...there's no way
Paul would get one these days.
Josh Luthman
Office: 937-552-2340 <tel:(937)%20552-2340>
Direct: 937-552-2343 <tel:(937)%20552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Mar 20, 2017 at 11:03 AM, George Skorup
<[email protected]> wrote:
Be careful connecting +48VDC to a SiteMonitor. Verify it's a Base-II
first. The old Base-I's are limited to 30 or 32VDC on both inputs.
I typically connect the pwr1 input to my main rail, usually 24-28VDC
so it's safe for Base-I's or Base-II's. I've been recycling a lot of
old Base-I's from site rebuilds the last year or so. Pwr2 gets the
wall brick for utility monitoring. I try to dig out old SyncPipe
power supplies if I can find them because they're linear. We're at
many towers with crappy power, or those 3-phase sites that lose a
phase and we end up with <100VAC and our UPS transfers to battery.
Most switching bricks will operate down to 80-85VAC. Has happened
more times that I can remember. Site goes down because the batteries
ran down, yet we never got a utility power alarm. The linear brick
lets you see the voltage situation. Problem is, they're getting
pretty hard to find now.
On 3/20/2017 7:51 AM, Josh Baird wrote:
Yes - it can accept multiple voltages on PWR1 and PWR2.
Josh
On Mon, Mar 20, 2017 at 8:24 AM, Paul McCall <[email protected]>
wrote:
Can the sitemonitor have two different voltages on the 2 inputs
that it monitors / powers from?
We have a lot of them setup in the field with a 110vac โ 24v wall
wart to monitor commercial power. And, the 2nd input is off the
24v battery array. Batteries are all 48v now, so wondering if I
need to buy a bunch of similar 48v wall warts or whether the
SiteMonitor can deal with the 2 different voltages and I donโt need
to buy anything ๐
Paul McCall, President
PDMNet, Inc. / Florida Broadband, Inc.
658 Old Dixie Highway
Vero Beach, FL 32962
772-564-6800 <tel:%28772%29%20564-6800>
[email protected]
www.pdmnet.com
www.floridabroadband.com
