Electronic Wizards

RSR 555 · Post by **RSR 555** » Mon Nov 18, 2013 9:51 am

Hey guys,

Anyone here got any experience with low power cables over long distances?

I'm looking to run a cable from the back of our AIS on the bridge down to the Control Room. The distance is about 50mtrs but the laid cable length would probably be closer to 70mtrs.

The AIS has a RS422 comms port and I want to run it in to the Windows 7 Enterprised based PC.

My question is, what is the best way to connect these 2 systems?

Cheers,
Paul

Post by **Bantum** » Mon Nov 18, 2013 1:39 pm

I'm No expert in this area, but my understanding is that you might need a repeater, no idea how far apart it will need to be though.

See more here : http://en.wikipedia.org/wiki/RS-485

Further : A network hub or line driver, may be what your after : http://en.wikipedia.org/wiki/Line_driver

Add : I just looked up this : http://en.wikipedia.org/wiki/RS-422

It states a max distance of approx. : 1500m ...

So I'd check your unit to see what its specs are - do you still have the instructions ?

Cheers, Bantum ...

RSR 555 · Post by **RSR 555** » Mon Nov 18, 2013 2:46 pm

Most likely sounds like it will need some sort of repeater/booster I believe.

The AIS is the SAAB R4 Class A model and here is a link to its website tech page...
http://www.saabgroup.com/en/Civil-secur ... fications/

Cheers,
Paul

Post by **Bantum** » Mon Nov 18, 2013 4:06 pm

There's a link with a Tech Support help page : http://www.saabgroup.com/en/Civil-secur ... s/#Manuals

It might also be worth a try giving them a bell to find out what's required ...

So does yours look like this ?

& what's the boat this is going in look like ? ...

Cheers, Bantum ...

Gannon · Post by **Gannon** » Mon Nov 18, 2013 4:37 pm

Can you convert the signal to wireless and back again?

vincentvega · Post by **vincentvega** » Mon Nov 18, 2013 7:46 pm

RS422 will easily do 70m with good quality twisted pair cable.

http://en.wikipedia.org/wiki/RS-422

then just add one of these to your PC

http://www.jaycar.com.au/productView.asp?ID=XC4132

Serial comms is a large chunk of what i do for a crust so any questions ask away.

RSR 555 · Post by **RSR 555** » Mon Nov 18, 2013 10:49 pm

Bantum wrote:It might also be worth a try giving them a bell to find out what's required ...

Yeah.. I did send them an email today.. cheers

Bantum wrote:So does yours look like this ?

Yes

Bantum wrote:& what's the boat this is going in look like ? ...

A 15,000T floating steel structure that drills holes in the sea bed

Gannon wrote:Can you convert the signal to wireless and back again?

Nah.. too much steel around.. signal would be lost

vincentvega wrote:RS422 will easily do 70m with good quality twisted pair cable.

http://en.wikipedia.org/wiki/RS-422

then just add one of these to your PC

http://www.jaycar.com.au/productView.asp?ID=XC4132

Serial comms is a large chunk of what i do for a crust so any questions ask away.

Perfect. Does this require addition power? What is the best quality cable to use and can we buy it explosion proof (EX rating?) and lastly, can we buy it Aus?

NachaLuva · Post by **NachaLuva** » Tue Nov 19, 2013 12:35 pm

Bantum wrote: & what's the boat this is going in look like ? ...

RSR 555 wrote: A 15,000T floating steel structure that drills holes in the sea bed

Lol

What is the best quality cable to use and can we buy it explosion proof (EX rating?) and lastly, can we buy it Aus?

Crikey, what are you planning to do with it?!

Post by **Bantum** » Tue Nov 19, 2013 4:17 pm

NachaLuva wrote: Crikey, what are you planning to do with it ?!

Says here ...

RSR 555 wrote:... A 15,000T floating steel structure that drills holes in the sea bed ...

Sounds like a drilling rig for Gas ...

RSR 555 wrote:...What is the best quality cable to use and can we buy it explosion proof (EX rating?) ...

And you need some form of protection from blow back right ?

Got any pictures you can show us ? ...

Cheers, Bantum ...

Battlewagon · Post by **Battlewagon** » Tue Nov 19, 2013 6:22 pm

Perhaps avoiding any electrical issues and using fibre optic might be safer?

vincentvega · Post by **vincentvega** » Tue Nov 19, 2013 8:06 pm

mate if your install is running through an EX environment you need to get some better advice than asking on a subaru forum

I would highly recommend you talk to the manufacturer of the gear and go from there.

RSR 555 · Post by **RSR 555** » Tue Nov 19, 2013 10:42 pm

Bantum wrote:Sounds like a drilling rig for Gas ...

Exactly

Bantum wrote:And you need some form of protection from blow back right ?

Yeah kinda.. we need to eliminate any chances of spark/ignition sources.

Bantum wrote:Got any pictures you can show us ? ...

Battlewagon wrote:Perhaps avoiding any electrical issues and using fibre optic might be safer?

That's probably a good possibility. I'll look in to that.

vincentvega wrote:mate if your install is running through an EX environment you need to get some better advice than asking on a subaru forum

I would highly recommend you talk to the manufacturer of the gear and go from there.

Thanks VV but from what I've found from talking to people on this site, is there is a lot more to them than just enjoying the fantastic experience of owning a Subaru. So whilst I agree it's not the best place to ask about this stuff, it's great to get people talking about stuff they might even do for a living.

Thanks for your advise and like I said to before, I've sent an email off to the manufacture of this system and hope to hear from them soon.

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