I’d make sure that:

 

ether1-poe-in-long-cable

 

is set to yes/on as I’ve seen oddities with 750P deployed in such a fashion.

 

Paul Tackett, COO

406-284-3174x105

 <mailto:[email protected]> [email protected]

---------------------------



 

From: [email protected] 
[mailto:[email protected]] On Behalf Of Josh Luthman via 
Mikrotik-users
Sent: Tuesday, January 2, 2018 19:14
To: Nick Bright <[email protected]>; Mikrotik Users 
<[email protected]>
Subject: Re: [Mikrotik Users] Powerbox staggering power on ports

 

Not sure what you mean by front and back.  It's a Powerbox.

 

Ethernet Poe comes from Tycon.  The fat 110 psu would go into the DC barrel if 
there's 110 available.

 

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373

 

On Jan 2, 2018 8:55 PM, "Nick Bright via Mikrotik-users" 
<[email protected] <mailto:[email protected]> > wrote:

I've had some older RB750UP units behave that way intermittently, but the newer 
versions as well as the RB960UP work well. If it's an older PowerBox that might 
be a problem, the rest of this assume it's a pretty new unit.

Are you using the front (POE JR45) or rear (terminal) voltage output on the 
Tycon? The rear output should have a higher amperage capacity, so you could try 
that if you're using the RJ45 currently.

Also keep in mind that the load output on the front/back is an OR value, not an 
AND value. You can have 1.5A on the back OR 1A on the front, but not both. If 
you've got both running, and are exceeding 1.5A, the unit is being overloaded 
(I killed a few Tycon controllers this way).

It sounds like your boot up spike load for all three devices is probably more 
than 1A, but I don't know that it's more than 1.5A. I would advise measuring it 
to be sure.

You may be able to move from the front to the back to get another 0.5A, which 
might give enough breathing room to fix the problem; since it's the startup 
spike load seems to be what's causing the issue.

Another possibility might be to replace the charge controller with a device 
capable of more output. I suspect the Tycon is your problem (not enough output 
current for the startup spike). I have several RB750UP (newer units) and 
RB960UP units in the field on MeanWell AD-55B controllers, and they power up 
3-5 units of various configurations of RocketM2/ePMP from a dead stop, but they 
put out about 2.4A @ 24v (note that the AD-55B doesn't include solar 
capabilities). 

On 1/2/2018 9:04 AM, Josh Luthman via Mikrotik-users wrote:

We have an unfortunate deal where we have a temporary solar situation.  It's a 
24vdc supply to a Powerbox which is POE to a BH and AP (Epmp and Nano). 

 

Over night of course it loses power these weeks with the lack of sun.  We get 
there in the morning and with all three things plugged in it won't boot right.  
It looks like the Powerbox comes up but the red light for POE keeps blinking to 
the BH and AP.  We can unplug these two, then plug in the BH, and then the AP 
to solve this problem.


Is there a way to do this without writing a script on RouterOS?  I'm thinking 
of shutting power off on bootup, then after 60s port 3 on, 60s port 4 on.


 

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

 

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