Re: [NTLK] connecting a newton, powered or no?

From: Philip Bennett (pbnt_at_earthlink.net)
Date: Mon Mar 25 2002 - 16:16:03 EST


See, I knew we'd get an informted opinion eventually. Thanks Johannes

> From: "Johannes Wolf" <jwolf_at_xe.estec.esa.nl>
> Reply-To: newtontalk_at_newtontalk.net
> Date: Mon, 25 Mar 2002 15:38:50 +0100
> To: <newtontalk_at_newtontalk.net>
> Subject: Re: [NTLK] connecting a newton, powered or no?
>
>
> Sorry, you cannot compare the Newt serial connection (RS-485) with USB.
> USB is designed for hot plugging while RS-485 is NOT.
> Thus, under unlucky circimstances the RS-485 interface may latch up while
> the USB interface is expected NOT to do so.
> Ok, this is THEORY: practice shows that USB can be damaged due to hot
> plugging and RS-485 will normally survive hot plugging in most cases...
> Nevertheless you should be aware, that RS-485 is not designed to be hot
> plugged and may be damaged, especially if it comes to the discharge of
> electrostatic energy.
> But as long as you try to touch the isolated parts only it should be ok.
>
> Johannes
>
>> -----Original Message-----
>> From: newtontalk-bounce_at_newtontalk.net
>> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Philip Bennett
>> Sent: Monday, March 25, 2002 3:24 PM
>> To: newtontalk_at_newtontalk.net
>> Subject: Re: [NTLK] connecting a newton, powered or no?
>>
>>
>>
>> I don't think it makes any difference. If you're using an adapter you're
>> basically making a USB connection with (theoretically!) is
>> hot-plugable and
>> un-plugable. Anyway I just connect mine whenever I'm ready. I never power
>> down my computer. 'Course it could blow up tomorrow but I don't think so.
>> Maybe one of our engineer-types can shed some more light. Anyone? Bueller?
>> Anyone?
>>
>> Phil
>>
>>> From: "Dan" <dan_at_dbdigitalweb.com>
>>> Reply-To: newtontalk_at_newtontalk.net
>>> Date: Sun, 24 Mar 2002 16:47:59 -0500
>>> To: <newtontalk_at_newtontalk.net>
>>> Subject: [NTLK] connecting a newton, powered or no?
>>>
>>>
>>> Hello all,
>>> I have been hearing many different views on this so I thought I
>> would ask
>>> again and get the "latest" conclusions. Should the computer be
>> powered down
>>> before connecting the newton for backup etc? I always have the
>> newton in
>>> sleep mode, but does it really make a difference either way? I
>> have heard
>>> both sides.
>>>
>>> -Dan
>>>
>>>
>>> --
>>> Read the List FAQ/Etiquette: http://www.newtontalk.net/faq.html
>>> Read the Newton FAQ: http://www.guns-media.com/mirrors/newton/faq/
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>>>
>>
>>
>> --
>> Read the List FAQ/Etiquette: http://www.newtontalk.net/faq.html
>> Read the Newton FAQ: http://www.guns-media.com/mirrors/newton/faq/
>> This is the NewtonTalk mailing list - http://www.newtontalk.net
>>
>>
>
>
> --
> Read the List FAQ/Etiquette: http://www.newtontalk.net/faq.html
> Read the Newton FAQ: http://www.guns-media.com/mirrors/newton/faq/
> This is the NewtonTalk mailing list - http://www.newtontalk.net
>

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