AUT Seite 37 20 SchnittStellenCenter Fürth PROFIBUS Schnittstelle 75ALS176D 1 1 2 U+ EN1 GND EN2 100K 2P5 2M 68n 2P5 2M 680R 1K2 IN U- HCPL7101 U+ U- U+ 68n EN 2M P5 680R 1K2 OUT EN 680R300R 680R HCPL0601 2P5 & 2 3 74HC132 300R U+ IN U- 300R 68n 680R OUT EN U- U+ 20K M M HCPL7101 2P5 2M 300R M CTS RTS TXD RXD Important: electrical isolation to bus P5 and 2P5 Shield 1 4 2 Driver select : Differential voltage > 2V Layout :lines must be kept as short as possible.
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