Archived from groups: alt.comp,alt.comp.answers,alt.comp.cableboyz,alt.comp.misc,alt.comp.networking.connectivity (
More info?)
On Sat, 28 May 2005 10:36:26 GMT, Robert Baer
<robertbaer@earthlink.net> wrote:
>David Melville wrote:
>
>> On Fri, 27 May 2005 06:51:00 GMT, Robert Baer
>> <robertbaer@earthlink.net> wrote:
>>
>>
>>>David Melville wrote:
>>>
>>>
>>>>On Thu, 26 May 2005 23:33:24 GMT, Robert Baer
>>>><robertbaer@earthlink.net> wrote:
>>>>
>>>>
>>>>
>>>>>David Melville wrote:
>>>>>
>>>>>
>>>>>
>>>>>>On Thu, 26 May 2005 18:32:43 GMT, Robert Baer
>>>>>><robertbaer@earthlink.net> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>David Melville wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>G'day all, sorry about the massive crosspost.
>>>>>>>>
>>>>>>>>Have a Sola 305 UPS (Best Power/Powerware), sans interface cable
>>>>>>>>(DB9).
>>>>>>>>
>>>>>>>>Obviously, I'd rather make up a cable than pay someone else.
>>>>>>>>
>>>>>>>>Searched high and low, but can't locate much *useful* information (to
>>>>>>>>a cable newbie, anyway!) regarding the pinouts and config of such.
>>>>>>>>
>>>>>>>>The manual lists the pinouts (copied below), but, having never made up
>>>>>>>>a custom DB9 before, I can't really make head nor tail. It seems as
>>>>>>>>though I only have from the manual half the info needed.
>>>>>>>>
>>>>>>>>What I'm after is someone who can tell me the pairs simply, for
>>>>>>>>example:
>>>>>>>>
>>>>>>>>Male ----> Female
>>>>>>>>1 3
>>>>>>>>2 5
>>>>>>>>3 6
>>>>>>>>4 etc . . .
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>Here's the info from the manual.
>>>>>>>>=========================================
>>>>>>>>Pin 1 RS232 Level Shutdown
>>>>>>>> (+12VDC signal held for 5 seconds causes shutdown 120 seconds
>>>>>>>>later. UPS restarts 15 seconds after power returns.)
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 2 Unused
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 3* Normally Open On-Battery Contact
>>>>>>>> (Pulls to common 15 seconds after UPS switches to battery
>>>>>>>>power.)
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 4 Common
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 5* Normally Open Low-Battery-Alarm Contact
>>>>>>>> (Pulls to common during Low-Battery Alarm (duh!))
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 6 Normally Closed Low-Battery-Alarm Contact
>>>>>>>> (Releases from common during low battery alarm. Tells some
>>>>>>>>software when to initiate a system shutdown.)
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 7 Unused
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 8* Normally Closed On-Battery Contact
>>>>>>>> (Releases from common 15 seconds after UPS switched to battery
>>>>>>>>power.)
>>>>>>>>
>>>>>>>>
>>>>>>>>Pin 9 Unused
>>>>>>>>
>>>>>>>>
>>>>>>>>[* Contacts consist of open collector circuits capable of switching up
>>>>>>>>to +30VDC, 6mA resistive load.]
>>>>>>>>=========================================
>>>>>>>>Here's hoping.
>>>>>>>>
>>>>>>>>TIA.
>>>>>>>>
>>>>>>>>Cheers,
>>>>>>>> Dave
>>>>>>>>
>>>>>>>>------------------------------------------------
>>>>>>>>"I'd sell my soul for a Formula One racing car".
>>>>>>>>
>>>>>>>>"Bart! Stop pestering Satan!"
>>>>>>>>------------------------------------------------
>>>>>>>
>>>>>>>The pin specifications that you gave appear to be rather specific and
>>>>>>>informative.
>>>>>>>What you have *not* included is a description as to what thingus or
>>>>>>>whatchamaxallit that you might connect that port cable to.
>>>>>>
>>>>>>
>>>>>>from PC Serial Port (COM1) to UPS via DB9 serial cable.
>>>>>
>>>>>>The pinouts listed above are obviously (to me, anyway!!) the pin
>>>>>>assignments at the UPS end of things.
>>>>>>
>>>>>>Not sure what pins to connect them to at the PC's COM port, though.
>>>>>>
>>>>>>Hope that's what you're after.
>>>>>>
>>>>>>Cheers,
>>>>>> Dave
>>>>>>
>>>>>>------------------------------------------------
>>>>>>"I'd sell my soul for a Formula One racing car".
>>>>>>
>>>>>>"Bart! Stop pestering Satan!"
>>>>>>------------------------------------------------
>>>>>
>>>>> Pinouts are not standard for RS-232, and it seems that there are no
>>>>>input lines.
>>>>> Now the problem will be that *no* Baudout signaling is indicated by
>>>>>the specs you gave - no start bit, no data bits, no stop bits.
>>>>> The UART (or emulation of it in modern computers) is designed for
>>>>>7-level (data bits) coding; emulations now may not support the original
>>>>>5-level (data bits) coding.
>>>>> So, a "fudge" is indicated:
>>>>> UPS #4 (common) to COMx #7 (signal ground)
>>>>> UPS #6 (N.C contact) to -5V and COMx #8 (received line signal detector)
>>>>>
>>>>> One could alternately use COMx #5 (clear to send) or #6 (data set
>>>>>ready) instead of #8 (received line signal detector).
>>>>> Useage depends on programming (and maybe completeness of emulation).
>>>>>
>>>>> If i remember my TTY nomenclature correctly, note that +5V is
>>>>>considered a logic "1" ("mark") and -5V is considered a logic "0" ("space").
>>>>> Default is binary "1" ("mark") except when a signal is transmitted;
>>>>>an open circuit is also considered a logic "0" ("space") [at least for
>>>>>teletypes].
>>>>> I believe that signals of -3V and +3V are the "standard", with -5V
>>>>>and +5V used for "compatibility" with DTL and TTL circuitry; the
>>>>>threshold for timing purposes is defined at zero volts.
>>>>
>>>>
>>>>Remembering that I'm a little wobbly here, having never done it
>>>>before, does this mean the cable will be:
>>>>
>>>>
>>>>PC UPS
>>>>
>>>>1 -
>>>>2 -
>>>>3 -
>>>>
>>>>4 -
>>>>5 -
>>>>6 -
>>>>
>>>>7 4 ground
>>>>8 6 Recieved line sig. det.
>>>>9 -
>>>>
>>>>and that's all????????
>>>>
>>>>Pretty sure I've interpreted that incorrectly.......
>>>>
>>>>Please let me know what you mean via a table such as above.
>>>>
>>>>TIA. Sorry for the apparent idiocy. I'm not stupid - just
>>>>inexperienced ;-)
>>>>
>>>>Cheers,
>>>> Dave
>>>>
>>>>------------------------------------------------
>>>>"I'd sell my soul for a Formula One racing car".
>>>>
>>>>"Bart! Stop pestering Satan!"
>>>>------------------------------------------------
>>>
>>> Your interpretation is correct; just 2 wires for sensing low battery
>>>alarm state; do not forget the resistor.
>>> One could add sensing for pin 8 (Normally Closed On-Battery Contact)
>>>as a "immediate shutdown" indicator (again, do not forget the resistor).
>>
>>
>> Here I go again!! (Thank you for your patient help, by the way).
>>
>> What value (in ohms, I'd imagine - I know that much! ";~) )
>> resistor will I need. I'm assuming that it's needed to bring the +/-5V
>> signal to +/-3V . . . I'm prepared to be wrong!
>>
>> But if you can furnish me with that resistor value, then you have,
>> hopefully, completely solved my problem.
>>
>> Many TIA
>>
>> Cheers,
>> Dave
>>
>> ------------------------------------------------
>> "I'd sell my soul for a Formula One racing car".
>>
>> "Bart! Stop pestering Satan!"
>> ------------------------------------------------
> I am guessing that 2K would be a reasonable maximum value.
> Theroretically, the input resistance is 3K so if true, then 2K+3K=5K
>meaning 1mA current from the -5V line and thus -3V at the input and 2V
>drop on the 2K resistor.
> So during the time the relay is closed, the current would be 2.5mA
>which is reasonable.
> I personally would use no less than 1K.
Many, many, many thanks, Robert.
When I get around to making up the cable, I'll drop back and let you
know how it went.
Can't thank you enough.
Cheers,
Dave
------------------------------------------------
"I'd sell my soul for a Formula One racing car".
"Bart! Stop pestering Satan!"
------------------------------------------------
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