Max lengeth on Serial Cord

[nexus99]

I want to locate a HiFi unit in my Leviton can in my garage. However, my OmniIIe is located in my master bedroom closet. What is the maximum length a serial cable can run to connect the two?

Thanks!

 

[jaysonc]

I think the specification for RS-232 is 10 feet.

 

[nov0798]

It depends on the baud rate and the type of wire used.

http://www.lammertbies.nl/comm/info/RS-232_specs.html

 

[gatchel]

At 9600 baud you shouldn't have a problem. Stay away from electrical lines whe running the cable.

 

[PaulD]

I want to locate a HiFi unit in my Leviton can in my garage. However, my OmniIIe is located in my master bedroom closet.

Time to get creative. The HiFi is available in a small can which you might have room for up high on the closet wall....maybe mount the small can on the closet ceiling or even mounted on the door face of the Leviton can. Another issue is the garage environment may not be very friendly to the HiFi circuits. Do you have another closet, cabinet or hidden space in the house you can adopt without crossing the WAF boundary?

 

[nexus99]

I want to locate a HiFi unit in my Leviton can in my garage. However, my OmniIIe is located in my master bedroom closet.

Time to get creative. The HiFi is available in a small can which you might have room for up high on the closet wall....maybe mount the small can on the closet ceiling or even mounted on the door face of the Leviton can. Another issue is the garage environment may not be very friendly to the HiFi circuits. Do you have another closet, cabinet or hidden space in the house you can adopt without crossing the WAF boundary?

Thanks for the info!

I am guessing that I need some type of software to configure this unit to work with an OmniIIe... is this included with the HiFi main unit?

Just as an aside -

When I started looking into this type of home equipment I was shocked to see the lack of forward looking connectivity options. Anyone know why this market got stuck on RS-232 as opposed to more advanced connectivity options? It would be so easy to plug an ethernet cable into this unit and not have to worry about cable length, etc.

 

[jaysonc]

Well, I am not sure where I got 10ft from! It is WAY off.

Sorry for the bad info.

--
Jayson

 

[Lagerhead]

Well, I am not sure where I got 10ft from! It is WAY off.

Well, many years ago (the early days, pre-1984-diversiture) we scrupulously observed a limit of 25 feet between devices. With dozens of serial connections in a computer room, and very little in the way of error detection, we did not want the risk.

On the other hand, for wired ASCII terminals, we always stretched the limit to whatever we could get away with, sometimes to 100 feet or more.

 

[drozwood90]

Personally...
115200 = 115ft
9600 = 300ft

I had a test engineer frend I worked with, had to wire in a bunch of serial terminals throughout the GE building he worked at. he claimed 1200+ft on his longest run. BUT keep in mind...baudrates weren't what they are now.

It all comes down to baud rate. The lower you can go, the farther you can carry.

--Dan

 

[cornutt]

When I worked for Gould in the mid-'80s, we routinely ran 9600 at up to 1000 feet, with only the occasional error. You have to use low-capacitance cable to get away with this.