AS-i/PROFIBUS Gateway
Connections, Displays and Operating Keys
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group · Tel.: Germany (6 21) 7 76-0 · USA (3 30) 4 25 35 55 · Singapore 7 79 90 91 · Internet http://www.pepperl-fuchs.com
Issue date - 21.12.2005
11
5.2.1 Bus Termination
If the AS-i/PROFIBUS gateway is at the end of the PROFIBUS line, the termination
resistors in the PROFIBUS connector have to be switched on.
Terminating resistors with RS 485:
PIN Designation of the SUB-D connector
Pin 3 Data line B („RxD/TxD-P“)
Pin 5 DGND (0 V)
Pin 6 VP / +5 V
Pin 8 Data line A („RxD/TxD-N")
If the gateway will be installed in a two wire circuit (only A + B Line), means no
5
Volt supply, the gateway has to be placed at the end of the line.
Please install the bustermination as close as possible to the Sub-D connector
of the gateway.
AA A
B
B
B
390
220
390
Host
AS-i Master
AS-i Master
390
220
390
5V 5V
GND GND
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