But I wasn’t able to find what kind of pins or jack are expected to use there.
The two-pin connector is compatible with DC voltage in the range of 24 to 57V⎓.
You can power up an additional GPER14i unit using the two-pin connector. To achieve this, connect the device to the two-pin connectors of another GPER14i unit, and ensure that the SwOS Lite System's "Power I/O" option is configured as "Output." To enable this operation, the device itself must be powered via PoE-in.
I don't have GPERx4 nor did I ever see it in real life. But judging from photographs, the terminal contacts are not about some special connector (or jack) type, they seem like terminals for a solid wire ... so try to connect solid wire or stranded wire with wire hollow attached at the end (or soldered end of stranded wire). It seems like the wire has to pass through the terminal (from the side with +- symbols printed). Just make sure that wire core diameter is appropriate for the terminals.
To defend myself: I was looking this video https://www.youtube.com/watch?v=6IqAP3Z-O1g and around 1:15 there's pretty good head-on shot of the board. And the terminals look like they have some sort of mechanism which does allow to slide wire in one direction but grips more firmly when wire gets pulled in the other direction.
But then my disclamier applies: I haven't seen GPERx4 in real life so I don't have any idea how those terminals look in reality.
Yep, It Is perfectly possible that they are those kind of "biting" receptacles, but personally I wouldn't "trust" them on stranded wires, unless they are soldered/tinned (and when you tin them It Is not so easy to do so without creating a lump or blob that may prevent the insertion or force too much the spring).
With solid wire It would be better, but awg23 and awg26 (to name the two AFAIK most common wires used in CAT 5/6/7) are not the same, one could be too loose, the other a bit too tight.
And you could have also awg 22.
Mikrotik should publish specifications for the exact cables (or connectors) suitable to those receptacles.
... or, as I suggested, with wire hollows attached. And I guess the term I used "wire hollow" doesn't ring a bell, I just learned they are called wire ferrules.
Hmmm ... can't find a way to insert a ferrule image into the post.
But yes, it would be great if MT clarified what is the proper way of using these terminals.
That will I believe depend on the crimping tool, the square one won't likely do, the hexagonal one might (or viceversa).
In any case, when mounting a device on a roof, pole or however on a high ladder I would prefer to have the need for a crimping tool than for a soldering iron, paste and tin.
