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Author Topic: RS-485 driver IC change  (Read 5921 times)

CMS

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RS-485 driver IC change
« on: August 08, 2006, 12:31:53 AM »
I remember reading somewhere the coms driver IC could be changed to provide better protection from network faults.  Could you tell me where I caould find this information?

Thanks again
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FQ-ONG

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Re:RS-485 driver IC change
« Reply #1 on: August 08, 2006, 12:50:45 AM »
T100MD+ User's Manual (Green Cover):
Chapter 3:
Page 3-5:
3.2.2 Protection of RS485 Interface


Good Luck!
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CMS

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Re:RS-485 driver IC change
« Reply #2 on: August 08, 2006, 12:56:16 AM »
Thanks for that

I am sure I read that a substitute ic driver is available to do the protection internally.   Perhaps I am thinking of another manufacturers PLC.
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support

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Re:RS-485 driver IC change
« Reply #3 on: August 08, 2006, 09:57:47 AM »
It is LT1785AIN8 made by Linear Technology. It can withstand fault voltage up to +/-60V, whereas standard RS485 driver cannot withstand more than +12V or -7V. You can remove the existing RS485 driver and replace it with LT1785.

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CMS

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Re:RS-485 driver IC change
« Reply #4 on: August 09, 2006, 01:34:50 AM »
Thats what I was after

Many Thanks
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