[Nut-upsuser] apc with rs232

Julian H. Stacey jhs at berklix.com
Tue May 28 16:14:13 BST 2019

Hi, Reference:
> From:		Manuel Wolfshant <wolfy at nobugconsulting.ro>
> Date:		Tue, 28 May 2019 16:42:21 +0300

Manuel Wolfshant wrote:
> On 5/28/19 3:39 PM, Julian H. Stacey wrote:
> > grumpy at mailfence.com wrote:
> >> a friend gave me an old apc smart-ups 1250
> >> it has a rs232 interface but i have no pc with a rs232 port
> >> i attempted to use a rs232 to usb adapter but the ups goes nuts
> >> i connected the ups to batteries and verified it was working properly
> >> when i plug the usb cable into the pc the ups shuts down
> >> when i attempt to turn it on it beeps twice and shuts down
> >> this all occurs before i start the nut software
> >> other than give up or buy a new ups, any suggestions
> > Far cheaper than a new UPS would be a 2nd hand old small PC with ethernet;
> > then run NUT over ethernet to modern PC
> he would still need a correct cable ( as required by APC, I forgot about 
> their brain dead decision to use non standard wiring ), which seems to 
> be his real problem. and cheaper and consuming much less energy than any 
> old pc is a pci rs232 adapter

Yes, I have an APC too, APC pin out is weird non standard, I soldered
up my own special cable adapter years back if he (grumpy at mailfence.com
cc'd) just connected some serial adapter to APC, that would Not
work, & might be cause of his shutdown,

grumpy at mailfence.com should first make up an adapter with a male &
female, to adapt from APC to standard, that can then be added to
whatever else is used/ tried beyond.

Julian Stacey, Consultant Systems Engineer, BSD Linux Unix, Munich Aachen Kent
 Brexit ref. stole votes from 700,000 Brits in EU; 1.9 M young, more remainers
 had no vote; 1.3 M old, mostly leavers now dead.  Lies part paid by illegal
 foreign funds. In-sufficient fines & control.  http://stolenvotes.uk

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