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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Wrenches – William is correct, the SWI cable is not a straight
through printer style – it must be wired per the drawing on the link below.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Cheers,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Mark<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Mark Edmunds<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Director Engineering<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Residential Renewable Energy Markets<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Xantrex Technology Inc.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>mark.edmunds@xantrex.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>William Miller<br>
<b>Sent:</b> Tuesday, March 31, 2009 9:51 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Trace SW Stacking Cable?<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Carl:<br>
<br>
I have checked with Xantrex. I would not make a declaration on the
Wrenches forum to my esteemed colleagues unless I was quite certain. Find
the "SWI Stacking Cable wiring diagram" on our web site at: <a
href="http://millersolar.com/resources/resources.html">http://millersolar.com/resources/resources.html</a>
under "Manufacturer's data". This diagram came directly from a
Xantrex engineer. I have no reason to doubt it's authenticity. This is
not the pin out for a "standard" DB25 cable. Not also the link
just below it for "Not an SWI cable" This is your
"standard" cable. I fished this out of my attic this evening
and scanned it still in the package. Note it is listed as a
"straight through" cable. This means pin 1 connects to pin 1,
pin 2 to pin 2, etc. This is not the same wiring as depicted in the SWI
stacking cable diagram.<br>
<br>
I believe you have suggested twice that solar installers grab the nearest
"standard" DB25 cable and give it a try. I feel compelled to
correct the record publicly. These are not the same cables and
unspecified damage could occur. I know I once shorted out a sync cable
for Heart Interface inverters and blew two of them up catastrophically two days
before Christmas. It was a very unpleasant surprise for the client (who
had guests coming) and for my self. These cables are a direct link to the
FET control circuits and need to be treated with the utmost caution.<br>
<br>
I don't know what would happen to two SW inverters if connected with your
straight through cable, but I recommend strongly against trying it.
Please do not recommend practices unless you are quite certain they will cause
no harm.<br>
<br>
<br>
Respectfully,<br>
<br>
William Miller<br>
<br>
PS: Printer cables were never DB25-DB25. They were DB25 to
Centronics.<br>
<br>
Wm<br>
<br>
<br>
<br>
<br>
<br>
At 10:01 AM 3/31/2009, you wrote:<br>
<br>
<o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>William,<br>
</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> I used
an off the shelf cable to use with the SW and PS remote, it was a double male
ended 25 pin cable. They were formally used as printer/computer cables. I
believe the stacking cable is the same style. You could check with Xantrex.<br>
</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Carl
Hansen</span><o:p></o:p></p>
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