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General => Technical support => Topic started by: CMS on August 08, 2006, 12:31:53 AM

Title: RS-485 driver IC change
Post by: CMS 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

Title: Re:RS-485 driver IC change
Post by: FQ-ONG 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!

Title: Re:RS-485 driver IC change
Post by: CMS 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.

Title: Re:RS-485 driver IC change
Post by: support 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.

Title: Re:RS-485 driver IC change
Post by: CMS on August 09, 2006, 01:34:50 AM

Thats what I was after

Many Thanks