Second cap ac on eth2

RouterOS Beginner Basics
1

Hello,
i try to add a second ac on eth2 from ac1.
ac1 is in capsman.

if i connect the second ap on eth2 on 1 then both disconeccted from capsman an network.

if i connect ac2 on a switch everything works an both registered on capsman and working.

regards
M

2

And the question is ?

If you make sure the input voltage for AC1 is 57V.
On output it will give 400mA, that’s give or take 20-something W.. At maximum 22.4W (not taking into account voltage drop over feeding wire)
Just enough or not for a second device with maximum power consumption of 24W.
Standard power brick for cAP AC is 24V, at 500mA output that’s only 12W. Surely not enough for a device with minimum power requirement of 13W and most likely the reason why everything comes down when you try.

That second eth port was IMHO never intended for a second cAP AC.
cAP, yes. cAP Lite, yes.
cAP AC, you could be running out of luck…

3

hi,

the lights are flashing on both. the first is connected on the switch with the injector.
in Mikrotik Doku they says that eth1 is poe in and eth2 is poe out.

so, what could the poe out for? i think for a second ac.
reset all (rb2011 and both acs, configure capsman and both ac seperatly. all works except if i connect the second ap on eth2 from the first)

the question is, what could i have slipping ?

regards

4

In my view:
A second ac is practically impossible given power requirements. Definitely not with standard 24V power brick.

5

hi,
so, then for a voip phone it is the same… so, for what Mikrotik thinks that we can use the eth poe out ?

6

For devices satisfying the power requirements… :confused:

Have you even read my first answer ?

7

Hello,
for others:
i contacted the official MT-Support and asked if it is possible to connect the second ap to eth2 and if it should working.:
they told me that this is possible and should working.

so, what i am missing whem the second ap work immediately if i connect it on a switch but not on eth2 from the ap.

thank you.

8

Have you asked if the second device could be connected AND POWERED from eth2 from first device when the first device is powered using 12V power adapter ?
Given the power requirements, it can not be possible.
And your observations support my statement.

This is not rocket science.

9

Such setup is ok and will work: rb2011 → poe injector-> cap1 → cap2
But 12V PSU will not be powerful enough, input range for cAP is 17-57V, so use 24V 1A, or even better 48V PSU.

10

My mistake: standard power brick is 24V.
Then POE Out current on cap AC is 500mA , which gives at maximum 12W on POE OUT.
And that may not be enough with a second cAP AC which at maximum can go to 24W.

48V input would be better (400mA output on POE OUT = 19.2W) but even then, you may run into problems when that second device is heavily loaded.
Even with 57V max input voltage, you may sometimes run into trouble (22.9W POE OUT).
Disregarding any voltage drop over feeder lines …

11

It will never reach 24W, when specs give maximum, it means all interfaces going at full speed and CPU at max load. This is not normal use.