[Nut-upsuser] Contact-closure UPS

[Róbert SZAKSZ]

>On Nov 20, 2015, at 12:17 PM, Róbert SZAKSZ <robert at szaksz.eu> wrote:
>> 
>> No progress has been made:
>> 
>> cable is UPS - PC
>> 6 - 3
>> 7 - 5
>> 9 - 2
>> 
>
>Maybe pins 4 and 7 (ground) both need to be connected on the UPS side?
I connected both to pin 5 

>Unfortunately, I don't think there is a safe way (in software) to determine whether the UPS is not receiving the signal, or whether the PC is not receiving the reply.
>
>If you have a multimeter, you could check pin 9 on the UPS relative to pin 4/7 to see if it is being driven negative.
I mesured it and on DC and it shows 0 V (zero V). 
May be the information (pls. see attachment) that UPS PIN1 should bee keept HI is mandatory. Should I connect it to PC PIN4 DTR?

OR 

I need to follow with contact closure cable?

Best regards,
Robert SZAKSZ. 
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