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- Date: Thu, 16 May 91 18:46 HST
- From: humu!pilikia.pegasus.com!art@trout.nosc.mil (Art Neilson)
- In-Reply-To: Richard E. Showalter's message as of Thu May 16, 1991
- X-Mailer: Mail User's Shell (7.2.2 4/12/91)
- To: rich@vaxkiller.agi.org (Richard E. Showalter)
- Subject: Re: upsd and American Power Conversions 1200VX UPS
- Status: RO
-
- On Thu May 16, 1991, Richard E. Showalter writes:
- > Hi Art,
- >
- > I downloaded the upsd package from the net and I would like
- > to install it on a NeXT workstation using a APC 1200 UPS. I bought
- > the UPS second hand without manuals. I noticed from your README file
- > that your UPS is an American Power Conversions unit and I was
- > wondering if you could send me the pin outs on the DB9 that comes of
- > the back of the UPS. This is assuming that the two models use the
- > same DB connector. If so I will assume that the pinouts are the same
- > as well.
-
- I do have the manual which came with my APC unit, and I can give you the
- information on what each pin is used for. I have a DB9 to DB25 converter
- on the end of the DB-9 cable coming out of the APC UPS, I don't have pinouts
- for that cable. I got my cable from APC. I can speak with a friend of mine
- who is using my upsd package on his UNIX system, he made his own cable for it.
- Here's the specs from my APC manual:
-
- Pin 1: User sends a HI RS232 level for 4-5 seconds. This will signal
- the UPS to turn off it's output until proper line voltage returns
- (Only if UPS is on battery backup).
-
- Pin 2: UPS sends a high RS232 level within 1 second of a line fail and
- transfer to on battery backup. This pin is normally a RS232 low.
-
- Pin 3: UPS simulates a relay closing between pin 3 and pin 4 in conjunction
- with pin 2.
-
- Pin 4: Switch common for pins 3, 5 and 6.
-
- Pin 5: UPS simulates a relay closing when the battery inside the UPS has
- less than 2 minutes (configurable to 5 minutes see "Using your UPS"
- configuration switches).
-
- Pin 6: UPS simulates a relay opening between pin 6 and pin 4 in conjunction
- with pin 2.
-
- Pin 7: User may send a HI RS232 level for 1 second to externally turn on
- the UPS. User may ground this pin for 1 second to externally turn
- off the UPS instantly.
-
- Pin 8: Unregulated +24VDC protected internally by a 10k Ohm impedance.
- Voltage is present whenever the rear panel switch is ON.
-
- Pin 9: Chassis ground.
-
- I'm currently making some mods to my upsd program to detect and shutdown
- the system if the APC UPS signals a low battery condition. I will be
- testing the changes in the next few days, I'll submit the patches to
- comp.sources.misc in a week or so. I also am researching on how to
- tell the UPS to turn off. According to the docs, you just bring pin 1
- high I'm not quite sure how I can do this with software tho. Maybe if I
- can tie it to another output, that'd require cable changes tho. If I
- can make a separate utility called suicide or something, I can call it
- from the init.d run level 0 script which is invoked when the system
- shutdown script completes. This would keep the battery from running on
- and on after the system has been shut down. Anyway, I'll get the cable
- specs from my friend and will email it to you. Hope the info I've provided
- is helpful.
- how to do it and sh
-
- --
- Arthur W. Neilson III | INET: art@pilikia.pegasus.com
- Bank of Hawaii Tech Support | UUCP: uunet!ucsd!nosc!pilikia!art
-
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