APC Pro 550 switches to battery and dies when Data Port connected

[Anonymous user]

Hello!

I just got a used APC Pro 550 and connected my NAS to the UPS.

As i have some multiple devices that should shut down on their own i wanted to install N.U.T. on a raspberryPi and connect my devices to it.

And here my troubles begin: as soon as i connect the UPS-dataport to my raspberry the UPS switches to battery and soon after dies and restarts. When i boot my NAS up again after some seconds the UPS switches to battery again...

Am i missing something (configuration-wise) or is it a hardware problem?

any help would be appreciated!

[BillP]

Hi,

Have you tried to connect the UPS to a Windows system or Mac and if you do is the UPS discovered and does it stay on line?

[Anonymous user]

Hi!

Sorry it took so long, had to find the time to get the UPS to my windows machine.

Connected both surge and data, seems stable, UPS is recognised as HID-USV-Akku (German).

huh - strangest thing: i connected the same Raspberry to the same output and to the data-port and... no shutdown.

i can't test very much with my NAS because these dirty poweroff can't be good for the drives 😞

[Anonymous user · Accepted solution]

no ideas?