Good quality cable needed

[NickMu]

Thank you Norm for your input.
My application requires a minimum 19.200 baud rate (I hope to get 38.400).
High noise environments and harsh humidity combined with sun exposure (ocean + Florida are the key words) are asking for highest quality cable I could get. It will be nice to keep the price as low as possible considering that I will be using quite large quantities but in this particular case the quality comes first.
I forgot to mention also that it has to be stranded wires with a gauge around 22 AWG.

Regards,

Nick

[Normnet]

Thank you Norm for your input.
My application requires a minimum 19.200 baud rate (I hope to get 38.400).
High noise environments and harsh humidity combined with sun exposure (ocean + Florida are the key words) are asking for highest quality cable I could get. It will be nice to keep the price as low as possible considering that I will be using quite large quantities but in this particular case the quality comes first.
I forgot to mention also that it has to be stranded wires with a gauge around 22 AWG.

Regards,

Nick

Perhaps wireless would simplify the material setup requirements.
What distance is required?

Norm

[Normnet]

See Belden 3109A or for listing.

Norm

[NickMu]

Thank you again Norm.
The total cable length is about 150’.
Wireless is not an option due to the fact that the remote module (slave) will, at some point, be submerged and a 100 % reliable connection is a must.
The cable you suggested fits some of the requirements but I’m looking for only one twisted pair and two power wires. Heavy duty jacket and shielding are a must along with availability in large quantities with no lead time. I will be employing half duplex communication using a custom protocol.

I can not express enough how much I appreciate your help.

I might have to contact some of the major cable manufacturers for some help but I tried the forum first hopping that someone might already be using something like this and knowing that is nothing I can do until after the weekend.

Regards,

Nick

[Normnet]

For 150' could the cable be enclosed by a continuous length of black plastic flexible pipe?

Norm

[dhouston]

http://www.hyperline.com/catalog/cab...sf4-a-pe.shtml

[NickMu]

Hi Norm,

I need a bending radius on a few inches. The cable will be protected by mesh sleeving to preserve flexibility and add more toughness to it.
This project of mine is in its infant stage. I’m sorry that I did not take the time to fully explain the requirements but I myself don’t have all the information yet. I’m collecting all the information I can before committing to a final design approach.

The RS485 half-duplex and maximum 4 wires cable (power + twisted pair) is already decided and can not be changed.

I found a good (but not ideal) Belden cable 3106Aas a candidate. Its only problem is that does not give me a separate GND wire.

Dave,
Your suggested cable seems robust enough.
I only have one question: can one of the twisted pair be used for power transfer to the slave unit? I was told that the data wires should be twisted and power wires should be normal.

Thanks for the input.

Nick