wiring for apc ups cables smart ups uninterruptible power supply

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From: Jeff Liebermann <jeffl@comix.santa-cruz.ca.us>
Newsgroups: comp.unix.sco.misc
Subject: APC UPS Cable wiring
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It's another day in UPS hell.  For the zillionth time, I find yet
another APC UPS, plugged into yet another server, wired with yet
another straight thru 9 pin cable, which absolutely does NOT work.
Once again, I dragged out my trusty D-connector crimping kit and built
yet another APC UPS cable.

For the benifit of those that screwed up in the same manner, and
didn't want to spend their profit margin on the approved APC cables,
here is the reverse engineered wiring diagram.  Let the crimping
begin.

--------------------------------
Smart UPS 940-0024B (black cable)
Use with "advanced" signaling.

        DE9S            DE9P
          PC             UPS
     /--1      /--->------1
     \--2--------<--------2
        3----/            3
        4                 4
        5----\            5
        6     \           6
        7--\   \          7
        8--/    \         8
        9        \--------9 gnd

--------------------------------
BackUPS 940-0023A  (grey cable)
Use with "basic" signaling.

        DE9S            DE9P
          PC             UPS
        1------\          1
        2       \---------2
        3                 3
        4             /---4
        5-------------*   5
        6             |   6
        7             |   7
        8             |   8
        9             \---9 gnd

--------------------------------

Note that with the black "advanced" cable, and a Smart UPS, and the
overpriced SNMP management adapter, you can configure and upgrade the
adapter from a serial port and a terminal emulator.  The trick is to
start at 2400 baud N81.  You can change the baud rate from the menus,
but 2400 is the starting default.

# Jeff Liebermann   150 Felker St #D Santa Cruz CA 95060
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# 831.426.1240 fax     http://www.cruzio.com/~jeffl
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