Hi Everyone,
NOTE: This is my second attempt to send this. The first email had a diagram
attached that the Maxim-ic.com engineer had sent me. This email list doesn't
let them go forward due to the 1.3mb file size.
I asked the Engineer at Maxim if there was a different package type that was
available rather than a SMD.
I also asked him some other questions that I thought might be useful and am
attaching a .bmp diagram that he sent me on how to wire these correctly.
The QUESTION/ANSWER is BELOW:
I hope this helps some people.
Steve
|================================================================
| Staff Comment 2009-12-23 09:21:02 PST
| By: Stewart M
|
| Hi Steve,
|
| See answers to your questions below:
|
| Questions:
| 1. Do I wire these lightning protection devices to the
| beginning the end or both sides of the cat5 wire that I will
| be using? (I don't know much about indirect lightning
| strikes, ESD, etc. and how/where they enter a network.)
|
| SM: It would be best to use a DS9503 and a PTC at the 1-Wire
| Master that is connected to your PC. This will provide
| protection from a surge of a near by lightning strike. You
| should also protect the 1-Wire Slave with just a DS9503. Placing
| a grounding block at the entry/exit area of the building would be
| a good idea as well. Realize, there is no complete protection
| for a direct lightning strike. Direct lightning will jump right
| across the DS9503 and the PTC. For more info on lightning look
| here:
|
| http://www.lightningsafety.com/nlsi_lhm/IEEE_Guide.pdf
|
| 2. If I'm using 3 wires (5V, Ground, Data) for my 1-wire
| network....What wires are connected to the DS9503? What wires
| are connected to the Little Fuse part # 0603L010YR ?
|
| SM: See attachment drawing. [[[Mailing list doesn't let me send this
attachment. - Steve]]]
|
| 3. If I'm NOT using the (5V)and using parasitic power what
| wires are connected to these devices?
|
| SM: Just remove the Little Fuse from the diagram.
|
| 4. Are there any other devices besides DS9503 surface mount
| device that can be used as I have a hard time soldering these
| devices to a 1-wire network. (I'm using TO92packages for temp
| sensors on my networks.)
|
| SM: Not that I am aware of.
|
| 5. Are there any other devices besides Little Fuse part #
| 0603L010YR Surface mount devices that can be used as I have a
| hard time soldering these devices to a 1-wire network.
|
| SM: You can use the following:
|
| http://www.littelfuse.com/part/250R080.html
|
| Best Regards,
|
| Stewart
|
|================================================================
| Customer Comment 2009-12-22 15:12:29 PST
| By: Steve
|
| Hi Stewart,
|
| Thank you for the excellent response to my question on
| Lightning Protection for a 1-wire network.
|
| Questions:
| 1. Do I wire these lightning protection devices to the
| beginning the end or both sides of the cat5 wire that I will
| be using? (I don't know much about indirect lightning
| strikes, ESD, etc. and how/where they enter a network.)
|
| 2. If I'm using 3 wires (5V, Ground, Data) for my 1-wire
| network....What wires are connected to the DS9503? What wires
| are connected to the Little Fuse part # 0603L010YR ?
|
| 3. If I'm NOT using the (5V)and using parasitic power what
| wires are connected to these devices?
|
| 4. Are there any other devices besides DS9503 surface mount
| device that can be used as I have a hard time soldering these
| devices to a 1-wire network. (I'm using TO92packages for temp
| sensors on my networks.)
|
| 5. Are there any other devices besides Little Fuse part #
| 0603L010YR Surface mount devices that can be used as I have a
| hard time soldering these devices to a 1-wire network.
|
| Thank you.
| Steve
________________________________
From: Rob Conway <rjcon...@bigpond.com>
To: owfs-developers@lists.sourceforge.net
Sent: Wed, December 23, 2009 3:25:36 AM
Subject: Re: [Owfs-developers] Lightning Protection - From Maxim-ic.com
I hope to resurrect my network soon and this information is useful. Being
surface mount components it a shame there is no supplier willing to create
small inline suppressors for 1wire based upon these DS9503 devices.
rob.
-----Original Message-----
>From: rosaic1...@yahoo.com [mailto:rosaic1...@yahoo.com]
>Sent: Wednesday, December 23, 2009 9:37 AM
>To: Owfs-developers@lists.sourceforge.net
>Subject: [Owfs-developers] Lightning Protection - From Maxim-ic.com
>
>
>Hi everyone,
>
>I've been concerned about my 1-wire network getting toasted also.
>
>I emailed Maxim, and here's was the engineer's response BELOW. This should
>protect your network from anything, except a direct lightning strike, which
>the engineer stated would be difficult to prevent.
>
>I hope this helps.
>
>Comments?
>
>Steve
>|
>|================================================================
>| Staff Comment 2009-12-22 11:09:26 PST
>| By: Stewart M
>|
>| Hi XXXXXXXX,
>|
>| I will be the application engineer assisting you. There are a
>| few things you can do to protect your 1-Wire devices from a
>| surge, indirect lightning or ESD event. I recommend using a
>| DS9503 part and a PTC resettable fuse. Here is the data sheet
>| for the DS9503:
>|
>| http://datasheets.maxim-ic.com/en/ds/DS9503.pdf
>|
>| The PTC I most recommend is from Little Fuse part # 0603L010YR
>| found here:
>|
>| http://www.littelfuse.com/part/0603L010.html
>|
>| You would place the DS9503 first, followed by the PTC, and then
>| the 1-Wire Device. This will protect you against most surges,
>| ESD events, and indirect lightning strikes. Protecting against
>| direct lightning events would be much more difficult.
>|
>| Best Regards,
>|
>| Stewart Merkel
>|
>| Bes
>|
>|================================================================
>| Submit Request 2009-12-21 13:12:23 PST
>| By: XXXXXXXXXX
>|
>| How do you protect a 1-wire network from a lightning strike.
>|
>| I don't want my temperature devices toasted, my hub, or anything
>| else on the network.
>|
>| Thanks.
>|
>|================================================================
>| REFERENCES
>|
>| Referring Url:
>| http://www.maxim-ic.com/
>|
>| Maxim Support Center:
>| https://support.maxim-ic.com/
>|
>| Maxim Home Page:
>| http://www.maxim-ic.com/
>|
>|================================================================
>|
>| Would you like to be automatically notified when new application
>| notes are published in your areas of interest? Sign Up for Maxim
>| RSS feeds. http://www.maxim-ic.com/rss/feed.mvp
>|
>|================================================================
>
>No virus found in this incoming message.
>Checked by AVG - www.avg.com
>Version: 8.5.430 / Virus Database: 270.14.117/2582 - Release Date: 12/22/09
>18:22:00
>
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