APC AP9. 58. 4 Serial to USB adapter with a Smart UPS. So, I ended up with a SU1. Smart UPS as a castoff from campus network services, and alas, it only has a serial RS 2. USB, and Im attaching it to a Mac. So, I went online, and found out that lo, APC makes something to address that only officially, it only works with the Back UPS models. I had the adapter, and plugged it in. Nothing. Nada. Zilch. Neither Mac nor PC would see the adapter was there. I figured it was dead, and prepared to RMA. But, on a whim, I decided to try putting a smart signaling cable between it, and the UPS. Viola My Mac instantly saw there was a UPS there. So, the adapter must be getting power from the serial side, and not the USB side. Weird. Anyway, thought I should share that piece of knowledge. So, not only do you need the adapter AP9. APC Smart Signaling cable 2 meters 9. Or, just make your own following the info on the apcupsd site.
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November 2017
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