29
UMG 508
Connection of Bus Lines
The incoming bus line is connected to clamps
1A and 1B. The bus line for the next device in
the line is connected to clamps 2A and 2B. If
there is no further device in the line, the bus line
has to be terminated with resistors (switch to
ON).
In switch extradata ON, clamps 2A and 2B are
switched off for the continuing bus line.
Illu. Profibus plug with terminating resistors.
Profibus- (Modbus)-Stecker
(extern)
Profibus (Modbus) connector
(external)
Terminating resistors
Other
profibus
stations
Screw-type terminals
D-sub,
9 pin,
socket
D-sub,
9 pin,
connec-
tor
