Michael, Whoa, this is more information than I expected. I'll be getting the necessary components as soon as possible. Can't wait to make that cable...
I will be posting the results of this project once it's done. Thank you very much! Joon ----- Original Message ----- From: "Michael Balcos" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, February 19, 2002 2:24 PM Subject: Re: [plug] Linux + UPS > I have been doing this for some time now. Most of the trick lies with the > cable. It is necessary for me to make my own cable since it cannot be > bought from computer shops(this case is mostly true for inexpensive "dumb" > contact closure UPSs). I am now using powerd but you might find the upsd > for Linux very helpful(it has a guide for making cables and how to > interface your UPS with upsd). > > Here are the pin outs of my Netstar UPS(these are the pins at the back of > your UPS): > > 5 - low battery > 2 - power failure > 4 - ground > 6 - ups shutdown > > these pins are in the following layout: > > 5 4 3 2 1 > 9 8 7 6 > > You can use the pinouts I've given you to maximize the use of your > UPS's features. > > If you merely want your computer to shutdown on a "low battery" condition, > the following cable is good with powerd: > > > UPS side Computer side > +-------Pin 4 (DTR) > -+- > | | <- 10 kiloOhm 1/2 watt resistor > -+- > Pin 5----+-------Pin 1 (DCD) > > Pin 4------------Pin 5 (Ground) > > If you want to use this cable, make sure to run powerd from your inittab > file and look for the "pf::powerfail:/sbin/shutdown ..." entry in that > file. Change the shutdown command in that entry to "/sbin/shutdown -h > now". Also make the necessary configurations in /etc/powerd.conf such as > getting info from the serial port and pointing to the right serial port. > > BTW, the parts of the cable can be bought at electronics shops (Alexan, > Radio Shack, etc.). I'd recommend ribbon cable for the wires. It should be > noted that it might be difficult to solder the wires to the 9 pin RS-232 > connectors (the ones at the end of the cables). Also, one of the 9 pin > RS-232 cables must be male while the other must be female. > > An easier way of making the cable is to rewire a straight 9 pin male to 9 pin female > cable found at computer stores. All you will need to buy from an > electronics shop is the 10 kiloOhm resistor. > > If you have the manual for you UPS, please double check the pinouts that I > gave you. I'm not sure if they've changed it for newer models. > > Good luck! > > balky > > _ > Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph > To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] > > To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED] > _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]
