Does it have a name?
It are relays, that's all i can tell
http://s25.postimg.org/k8xi3rocf/20150821_175801_1.jpg
http://s25.postimg.org/4m68qeakf/20150821_175814_1.jpg
12v (coils)
250v
8A
One has a big chip on it: PIC16C55-XT-P
.http://www.futureelectronics.com/en/technologies/semiconductors/microcontrollers/8-bit/Pages/6765416-PIC16C55-XT-P.aspx?IM=0
( It was in the trash, but iam sure it still works 
)
Thx in advance
The PIC chip is a microcontroller, so without knowing how it's programmed it's pretty-much worthless and you might as well pull it out.
I suppose you could trace-out or "buzz out" the connections, figure-out how the PIC chip is connected, get a PIC programmer, and re-program it if you wanted to go to the trouble.
12v (coils)
250v
8A
You can't drive a 12V relay coil directly from the 5V Arduino. You'd need a driver chip or a transistor or MOSFET, or something. But, I wouldn't think you could drive them from the PIC either...
Do you have part numbers for the relays?
P.S.
That looks like a DB9 connector, so it's probably a serially controlled relay board. But without knowing the protocol, you probably won't get it to work. IMO - It would be easier to build your own driver than to add an RS-232 port to the Arduino and maybe figure-out the maybe-serial protocol.
Those were a couple of nice pieces of gear before the burn-out. But as such, I'm not sure I would be too keen to re-use them. Nice set of SSRs and input interfaces, could certainly be re-used as parts.
If you were to use them, then either find a spec sheet giving the protocol, or set up the programmer to re-flash the PIC16C55. PICs are almost as popular as Arduinox, the parallel to this forum is the "PICLIST" which I haunted many years ago.
Thx for the info so far
I forgot the parts are home so you have to wait for more info on sunday evening 
But here is some info i can give:
They come from AIRCO/COOLING units. I can find some numbers on it, but googling them wont bring up any results. However, one has a name on it "TESLA" (maybe the brand) and both parts seems to be created in 1998.
More info on sunday
Well, of course it is a piece of commercial equipment.
Lots of luck finding a circuit - or any information at all. Manufacturers consider circuit design and software "trade secrets" and do not want the Chinese replicating the assemblies. (There’s a whole discussion stemming from that! 
)
It's up to you to figure it out - none of us would know.
Hi,
Its a relay output card, extender type, hence the 9pin connector.
From an industrial PLC unit, both are the same config but probably different versions.
If they are not for repair, then at least take the green connectors and the screw terminal plugs that are on the PCBs off they are good junkbox material, relays may be OK, but check the contact resistances.
Tom....