Hi I have a very serious problem with my router board 433AH its keep restating every 10 to 20 minutes...

In my router board I have three cards b/g with 200 m-watts (600 m-watts)
I connected three Omani antennas of 16dbi each to them.

Wlan3 is set as AP (channel 11 with 2462 mhz)
Wlan1 set as slave wds (channel 1 with 2412 mhz)
Wlan1 set as slave wds (channel 6 with 2437 mhz)

(Is its due to my setup or any other problem or its an bug please clarify it)

They are fixed on iron stand triangle.

Why it’s restarting but when I disable other cards like 1 and 2 then every thing works fine… if only wlan3 is enabled.

Can some one from mikrotik suggest some solution for the same…?

I checked the system health its showing 16.0 to 16.5 volts when all cards are activated

I don’t think that there may be any problem of power supply power is through APC UPS power servo.

Checkout the volts of ur power adapter. 433ah should be powered with 24volts.
there can be surge which ur APC UPS is not handling. R U sure u have 3 omni antenna. mounted so close.
Change them with 3 sectors. 120 degree each.

Checkout the volts of ur power adapter. 433ah should be powered with 24volts.
there can be surge which ur APC UPS is not handling. R U sure u have 3 omni antenna. mounted so close.
Change them with 3 sectors. 120 degree each.

Ya i have three omani antenna at 1 feet to each other in a triangle and my power adapter is 24 volts only

Birender

Check the power output (watts) of your power supply. If you can't find that then tell us the amps.

Power is much more important than volts when using multiple radio cards.

To use the water analogy: volts is like water pressure, amps is like hose diameter, watts is like gallons (or liters) per minute. If you are trying to put out a fire, gallons per minute is much more important than water pressure. The water pressure along with hose diameter allow you to figure out gallons per minute.

Also, what model radio cards are you using?

Tom

Check the power output (watts) of your power supply. If you can't find that then tell us the amps.

Power is much more important than volts when using multiple radio cards.

To use the water analogy: volts is like water pressure, amps is like hose diameter, watts is like gallons (or liters) per minute. If you are trying to put out a fire, gallons per minute is much more important than water pressure. The water pressure along with hose diameter allow you to figure out gallons per minute.

Also, what model radio cards are you using?

Tom

I am using RB433AH with three Wireless (Atheros AR5413) cards

and power supply is 24 volts adapter given by the vender in India along with the purchase of Mikrotik router board.

how can i check the voltage and amps and how about the watts most of the things are written on the adapter of the adapter one method is to use digital multimeter.

i am right if no please given some suggestion...

Birender

very cool analogy

To use the water analogy: volts is like water pressure, amps is like hose diameter, watts is like gallons (or liters) per minute. If you are trying to put out a fire, gallons per minute is much more important than water pressure. The water pressure along with hose diameter allow you to figure out gallons per minute.

very cool analogy

To use the water analogy: volts is like water pressure, amps is like hose diameter, watts is like gallons (or liters) per minute. If you are trying to put out a fire, gallons per minute is much more important than water pressure. The water pressure along with hose diameter allow you to figure out gallons per minute.

I normis do you have any suggestion why my RB433AH is restating very 10 to 20 minutes...
Please look on my config posted on the top...

Birender

Are you aware the RB433AH has a built-in voltmeter?
/system health print

Are you aware the RB433AH has a built-in voltmeter?
/system health print

Ya i know that when i check the voltage it shows 16 to 18 volts...
But my question is why its restarting...

Birender

buddy there u go.
ur voltage adapter is 18 volts as most vendorsin india do over marking it for 24 volts.
if it is 24 volt it should show atleast 22-24 volts not 16 to 18. or else the voltage supply to ur adapter is low and not 220 volts.

Is there any entries in the log after the reboot? If it is a 24v power supply, and the output is only 16v, it could be shutting down due to overheating. What is the current rating on the power supply?

Is there any entries in the log after the reboot? If it is a 24v power supply, and the output is only 16v, it could be shutting down due to overheating. What is the current rating on the power supply?

What will be power supply requirements...

24 volts @ 10 amps is OK or i have to by other one please mention the correct rating for Mikrotik router-board as what voltage is required by the router-board @ what amps.

I have different adapters with different ratings...

48 volts @ 35 amps
48 volts @ 15 amps
48 volts @ 10 amps
24 volts @ 35 amps
24 volts @ 15 amps
24 volts @ 10 amps
12 volts @ 35 amps
12 volts @ 15 amps
12 volts @ 10 amps

all above given adapters having range from 100 volts to 300 volts rating made in Koria

I am using these adapters for systems power supply to our access controllers and switches switches they all are PoE based connectors and all ports have PoE Capability for further extension.

If the same adapters i use with Mikrotik that 24 volts is any problem... as per my knowledge voltage should be consent and amps can be more also because amps is for load of the equipment if voltage is under or over cause equipments damage.

any suggestions.....

There is a problem somewhere. None of those are around 16 volts. Don't use any of the 48 volt units on that board. Are these regulated supplies? How long is the run from the power supply to the router?

Did you look at the log for any entries after the reboot? Do you see an entry like this?
18:00:12 system,error,critical router rebooted without proper shutdown, probably power outage

ADD: With your setup, I would use at least 12 watt power supply. That is 12v@1A or 24v@.5A. Your should provide plenty if they are working ok. And if PoE, NO POWER OVER DATA LINES!

There is a problem somewhere. None of those are around 16 volts. Don't use any of the 48 volt units on that board. Are these regulated supplies? How long is the run from the power supply to the router?

Did you look at the log for any entries after the reboot? Do you see an entry like this?
18:00:12 system,error,critical router rebooted without proper shutdown, probably power outage

ADD: With your setup, I would use at least 12 watt power supply. That is 12v@1A or 24v@.5A. Your should provide plenty if they are working ok. And if PoE, NO POWER OVER DATA LINES!

in my case power to Router is through PoE injector and cat cable is around 25 meters and the error same as your...

system,error,critical router rebooted without proper shutdown, probably power outage

My all adapters are connect the centralized power servo APC UPS 275 KVA data center power supply.

Birender

What make/model of PoE injector are you using? It doesn't send any power over the data lines, does it?

The power supplies don't have a minimum current, do they? Some of my switching power supplies require a current draw of 10% to 20% of the rating to properly regulate the voltage.

What make/model of PoE injector are you using? It doesn't send any power over the data lines, does it?

The power supplies don't have a minimum current, do they? Some of my switching power supplies require a current draw of 10% to 20% of the rating to properly regulate the voltage.

I got it when i purchase the router from the vender in india

The vendor is one thing. The manufacturer is what I wanted. I am not perfect, and I do stupid things now and then. Your vendor may not be perfect either. Maybe he gave you the incorrect PoE injector. Just checking.

ADD: I see you edit. That voltage is too high or too low for any of your power supplies. You should not be getting a 35% drop or rise across the supply line.

The vendor is one thing. The manufacturer is what I wanted. I am not perfect, and I do stupid things now and then. Your vendor may not be perfect either. Maybe he gave you the incorrect PoE injector. Just checking.

Dear friend at presently i am not near to power supply i am at remote place our tower construction is going on... i will mention you all details within few hours...

But i attached the system health snap for your ready reference...

Birender

I see your edit. That voltage is too high (12v ps) or too low (24v ps) for any of the power supplies you listed with the line length you have.

I see your edit. That voltage is too high (12v ps) or too low (24v ps) for any of the power supplies you listed with the line length you have.

can i check it with multimeter the output of the adapter and its amp amp meter i have digital multimeter today i check it and i will post the same for your reference....

hi can you give me your email id or msn or ymg id... if you don't mind.

Birender

I am not certain communicating with me off the forum is in your best interest. The best reason is: someone else here may see something I don't.

As long as you are checking voltages, check both ends! Check the output of the power supply at the supply, and at the router.

The ideal voltage and amps should be 24 volts and 1 amp or 2 amps. Why go for 10 amps or 25 amps they can power up 10 numbers of 433ah. check if your routerboard is properly grounded. Why need a 275KVA data centre UPS for a small device like 433AH. i have powered mine with a 600 VA UPS and adapter is 24 volts 2 amps. Works absolutely fine.

The ideal voltage and amps should be 24 volts and 1 amp or 2 amps. Why go for 10 amps or 25 amps they can power up 10 numbers of 433ah. check if your routerboard is properly grounded. Why need a 275KVA data centre UPS for a small device like 433AH. i have powered mine with a 600 VA UPS and adapter is 24 volts 2 amps. Works absolutely fine.

My adapter is 24 volts 1 Amps and it is on PoE with 25 meter cable and showing 16 volts.

what where your measurements with multimeter on both ends of cable.

As some said already - drop from 24V to 16V over 25m cable is not possible, unless something is broken, either cable or power supply. How long that router is there, is that port functional? Maybe port itself is damaged somehow.

I have been trying to tell u that although ur adapter shows 24Volts (it is marked 24 volts) but actually it is 18 Volts. It happens many times with Mikrotik vendors in India. check the voltage u r getting with a multimeter before u insert in the POE. I am sure it is not 24 volts.

I have been trying to tell u that although ur adapter shows 24Volts (it is marked 24 volts) but actually it is 18 Volts. It happens many times with Mikrotik vendors in India. check the voltage u r getting with a multimeter before u insert in the POE. I am sure it is not 24 volts.

I have checked with multimeter also its shows 24.7 volts

Can i also checked with cat cable for use to power up the RB433AH which pins curry current for router out of 8 wires.

Birender

There should be power on only two of the CAT5 lines. Two ground, two power and the data lines.
Here are all the different types of PoE units with the pinouts:
http://www.allpinouts.org/index.php/Pow ... _%28PoE%29
You want the type that uses only spare pairs, not data pairs.

ADD: Check both end connectors on the CAT5 carefully. Maybe one or more wires are not making contact in the connector, or connected to the wrong pin. The voltage drop you show is consistent with a power line or ground line not connected properly.

Here is the mathematics: If you have a voltage drop of 8 volts in a quiescent state, when those radios start to transmit, the power requirement will at least double. That translates mathematically to another 8 volt drop. That is now a 16 volt drop when all radios transmit.
24 - 16 = 8
Minimum is 10v.

There should be power on only two of the CAT5 lines. Two ground, two power and the data lines.
Here are all the different types of PoE units with the pinouts:
http://www.allpinouts.org/index.php/Pow ... _%28PoE%29
You want the type that uses only spare pairs, not data pairs.

ADD: Check both end connectors on the CAT5 carefully. Maybe one or more wires are not making contact in the connector, or connected to the wrong pin. The voltage drop you show is consistent with a power line or ground line not connected properly.

Here is the mathematics: If you have a voltage drop of 8 volts in a quiescent state, when those radios start to transmit, the power requirement will at least double. That translates mathematically to another 8 volt drop. That is now a 16 volt drop when all radios transmit.
24 - 16 = 8
Minimum is 10v.

When i activate my one card out of three its showing 16 to 18 volts and when i activate all cards three still showing same volts 16 to 18 volts in system-health.

what is the prob

Birender

You did verify when the router is operating:
1) the power supply is producing 24 volts at the power supply end of the CAT5.
2) the router end has only 16 volts.

Then you tell me. How do you get the 8 volt drop at about a half amp when it is idling, and don't expect the voltage to drop at twice the current when running full speed? There is resistance in the power line (CAT5) if all you told me is correct. It is Ohm's Law!
E = I * R
P = I * E

ADD: The only alternative I can see is if one of the power supply lines in the CAT5 is connected to the wrong pin, and the data line (or ground line) is dragging down the voltage. But that does not seem reasonable by the size of your power supplies. That would have burned out that input or the wire in no time at all.

You did verify when the router is operating:
1) the power supply is producing 24 volts at the power supply end of the CAT5.
2) the router end has only 16 volts.

Then you tell me. How do you get the 8 volt drop at about a half amp when it is idling, and don't expect the voltage to drop at twice the current when running full speed? There is resistance in the power line (CAT5) if all you told me is correct. It is Ohm's Law!
E = I * R
P = I * E

ADD: The only alternative I can see is if one of the power supply lines in the CAT5 is connected to the wrong pin, and the data line (or ground line) is dragging down the voltage. But that does not seem reasonable by the size of your power supplies. That would have burned out that input or the wire in no time at all.

When i checked at cat ending at router side its showing 23.6 volts i checked with multimeter

Birender

Is that 23.6v reading with the CAT5 connected to the router? If you have just the load of the multimeter on the CAT5, even with a resistive power connection, it will show almost 24v. But add a 6 watt load to a resistive power connection and you have a voltage drop!

Maybe I wasn't clear. You need to check the voltages on each end of the CAT5 while the router is connected and working!

ADD: By "resistive", I am talking just a few ohms here (less than 10) to cause this much drop. 24ga wire has a resistance of 3 ohms per 100'. If, for some reason, you have only one power and one ground wire connected, the circuit resistance would be about 6 ohms. Enough to cause that voltage drop.

Is that 23.6v reading with the CAT5 connected to the router? If you have just the load of the multimeter on the CAT5, even with a resistive power connection, it will show almost 24v. But add a 6 watt load to a resistive power connection and you have a voltage drop!

Maybe I wasn't clear. You need to check the voltages on each end of the CAT5 while the router is connected and working!

ADD: By "resistive", I am talking just a few ohms here (less than 10) to cause this much drop. 24ga wire has a resistance of 3 ohms per 100'. If, for some reason, you have only one power and one ground wire connected, the circuit resistance would be about 6 ohms. Enough to cause that voltage drop.

Let me try this also but during router connected how can i check adapter jack is injected into PoE and other end is in touter sealed box

The router end should not be a problem, even tho I think the output of the voltage from your router is correct. You might need a "breakout" connector on the CAT5 on the power supply end if there is no access to the power supply output at the supply. If you install your own ends, it may be worthwhile to strip a bit of wire back close to the connector, do the test, then install a new connector after cutting off the exposed wire.

ADD: Or get an extension cord and plug the power supply into the power jack on the router. Not permanent, just as a test. If it normally fails in 20 minutes, a couple hours on the power jack should answer the question.

FYI: I don't use PoE any more, and this is why. I run much larger wire and connect to the power jack. Wire breaks, connector failures, and those cheap CAT5 bulkhead fittings to get into the sealed box caused me way too much grief!