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please Help about a RS485 network

 
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mojsa2000



Joined: 18 May 2010
Posts: 78

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please Help about a RS485 network
PostPosted: Tue May 03, 2011 8:47 am     Reply with quote
Hi
I want to control a group of PIC's by a PC (half duplex). Because of long distance, I decided to make a network on RS485 protocol. In this way, I want to make a interface board that has a DB-9 connector and rs485 pins as inputs and outputs.
rs485 module can be a LTC485 or snSN65176B.
Please help me about this idea.
This is my idea:

http://www.4shared.com/photo/U7S3vRTS/RS485.html
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Tue May 03, 2011 12:33 pm     Reply with quote
Read the forum archives. There are many threads on this topic.
Search for this:
Quote:
RS485 network

Set it to "Search for all terms".
http://www.ccsinfo.com/forum/search.php
temtronic



Joined: 01 Jul 2010
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PostPosted: Tue May 03, 2011 1:20 pm     Reply with quote
Depending on the distance you need, consider using RJ-45 connectors and 'LAN' / 'Ethernet' premade cables. Cheap, twisted pairs, readily available up to 100' probably cost less than the price of 2 of DE-9 connectors. And no soldering required !
bkamen



Joined: 07 Jan 2004
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Location: Central Illinois, USA

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PostPosted: Tue May 03, 2011 8:00 pm     Reply with quote
temtronic wrote:
Depending on the distance you need, consider using RJ-45 connectors and 'LAN' / 'Ethernet' premade cables. Cheap, twisted pairs, readily available up to 100' probably cost less than the price of 2 of DE-9 connectors. And no soldering required !


And even though you'll find those connectors listed as RJ45's, they're really just 8p8c (8position 8conductor) modular connectors since RJ45 actually stands for "Registered Jack" and means a lot more than just the connector type. :D

Cheers,

-Ben
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arunb



Joined: 08 Sep 2003
Posts: 492
Location: India

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RE
PostPosted: Wed May 04, 2011 2:06 am     Reply with quote
you could also use terminal blocks, as in industrial systems.
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