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Longer comms cable for Inifinisolar parallel installation?


SilverNodashi
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Hi,

 

Has anyone used longer communication cables between 3 or 4 Infinisolar 4Kw inverters?

Due to existing wiring and equipment on the wall, I had to space the 3 inverters a bit more than the minimum recommended distance. But now the comms cable and current sharing cable is too short between the first and last inverter, by about 30cm.

 

I can make  all 3 current sharing cables longer, but the 15pin D sub comms cable is factory made.

Has anyone joined two of these D-sub cables, and it worked fine?  Or gotmlonger cables somewhere?

 

I haven't  tested the pin layout yet to see if  it will stay the same when two are connected.

IMG-20180515-WA0000.jpg

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@SilverNodashi,

I think you can make up your own cable, using standard VGA connectors, as they have the same 5 x 3 rows setup. Just check the back of your (older)PC/Laptop.

Just trace the pin-outs with a multi meter, and hopefully the extra distance in cabling won't "loose" anything.

Let us know if this works.

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12 hours ago, Sidewinder said:

@SilverNodashi,

I think you can make up your own cable, using standard VGA connectors, as they have the same 5 x 3 rows setup. Just check the back of your (older)PC/Laptop.

Just trace the pin-outs with a multi meter, and hopefully the extra distance in cabling won't "loose" anything.

Let us know if this works.

yes, I could probably go that route - but hoping to find a ready made-up cable instead. OR, want to know if anyone has done this and ran into problems?

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42 minutes ago, pilotfish said:

Why not cut the cable in the middle and just insert extension required. It may be non-standard, so inserting a piece of cable and going color-to-color is foolproof.

I don't favor cutting and joining cables like this, especially with something as sensitive as this. Generally, problems later arise from the joints. But I found someone in Benoni who's going to make me some longer cables, and will test them next week and report back. 

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