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isolating RS485

J

jibberjabber

Jan 1, 1970
0
Considering...

1) Use an isolated driver such as the ADM2486 with an isolated 100mW 5V-5V
DC-DC converter.

2) Use my standard 485 driver (LT1785) and power it with an isolated 100mw
5V-5V DC-DC converter and use 3 opto-couplers for the data and enable lines.

Are there advantages to one approach or the other?
Which opto-couple should I use for #2?

thx
 
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