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#329888 - 07/02/2010 13:26 What is the difference between an RS-232 cable and a DB9 one?
burdell1
old hand

Registered: 14/01/2002
Posts: 930
Loc: Minnetonka, MN
This might be a stupid question, but i cannot seem to find an answer for it....I have a DB9 female to female cable for my empeg (although for the life of me, i can't find it at the moment) and need an RS-232 cable to do a firmware update for my receiver. Are they different? i can't seem to find a straight answer using Google....

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#329889 - 07/02/2010 13:56 Re: What is the difference between an RS-232 cable and a DB9 one? [Re: burdell1]
peter
carpal tunnel

Registered: 13/07/2000
Posts: 4144
Loc: Cambridge, England
Originally Posted By: burdell1
Are they different? i can't seem to find a straight answer using Google....

That's sort-of because you're not asking a straight question. wink RS-232 is a signalling standard, and DB9 is a connector standard. Most cables that are intended to carry RS-232 signals, have DB9 connectors -- but some RS-232 cables have different connectors, and some cables for other signals have DB9 connectors.

The Empeg cable is suitable for RS-232 (and has DB9 connectors). The only gotcha is that there are two possible ways of wiring up such a cable: "null-modem" and "straight through" (though "straight through" are usually female-to-male). The Empeg one is "null-modem". If your Empeg cable fits the connectors for your firmware upgrade, it'll probably do the job.

Peter

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#329898 - 08/02/2010 02:21 Re: What is the difference between an RS-232 cable and a DB9 one? [Re: peter]
lectric
pooh-bah

Registered: 20/01/2002
Posts: 2081
Loc: New Orleans, LA
Perhaps he's referring to a DB25 rather than RS-232?

More than you ever wanted to know about serial cables.

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