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mojsa2000
Joined: 18 May 2010 Posts: 78
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please Help about a RS485 network |
Posted: Tue May 03, 2011 8:47 am |
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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 |
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PCM programmer
Joined: 06 Sep 2003 Posts: 21708
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temtronic
Joined: 01 Jul 2010 Posts: 9170 Location: Greensville,Ontario
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Posted: Tue May 03, 2011 1:20 pm |
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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 ! |
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bkamen
Joined: 07 Jan 2004 Posts: 1611 Location: Central Illinois, USA
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Posted: Tue May 03, 2011 8:00 pm |
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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 _________________ Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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arunb
Joined: 08 Sep 2003 Posts: 492 Location: India
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RE |
Posted: Wed May 04, 2011 2:06 am |
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you could also use terminal blocks, as in industrial systems. |
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