Serial Cable Shuts Down UPS

Q

qdemn7

Supreme [H]ardness
Joined
May 2, 2002
Messages
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I've bought a APC Smart UPS 1400 NET I bought off EBay. After replacing the batteries, the unit works fine, except for one thing. Whenever I plug in a Serial Data Cable into the back of the unit, and THEN plug it into a Serial Port, the UPS shuts down, or it simply will not start. With just the cable plugged into the UPS, and the other end unplugged, it runs or starts fine. I even tried a Serial to USB Adapter, and the same thing happens. I just bought a generic Serial Cable, and not this one, since it appears to be just a generic cable.

So obviously something is grounding out. But what? Any ideas, solutions or suggestions?
 
This happens with my APS Smart UPS 700VA. It turns out that it doesn't use a standard serial cable - some of the wires are switched around (kinda like a crossover cable). I assume that this is so you have to buy the cable from APS.

Do you have the official cable? Is your cable for your specific UPS (they do have a few different cables for different UPS's)? Maybe try reversing the cable?

I came across a site that told of which wires were switched so that you could make a homemade cable, but I failed to after 2 attempts. I think that I'm going to give in and just buy a real one. Try googling it, as you may have better luck.
 
Vette5885 said:
This happens with my APS Smart UPS 700VA. It turns out that it doesn't use a standard serial cable - some of the wires are switched around (kinda like a crossover cable). I assume that this is so you have to buy the cable from APS.

Do you have the official cable? Is your cable for your specific UPS (they do have a few different cables for different UPS's)? Maybe try reversing the cable?

I came across a site that told of which wires were switched so that you could make a homemade cable, but I failed to after 2 attempts. I think that I'm going to give in and just buy a real one. Try googling it, as you may have better luck.
Click to expand...
No I used a standard Serial Cable. I guess I'm going to have to bite the bullet and buy the real cable also. Thanks.
 
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