Siemens SIPART DR22 Manual page 167

Manual
D Connecting the interface PROFIBUS-DP, 6DR2803-8P
Connection
Can be inserted in slot 4
PROFIBUS-
module
Instrument 1
(Slave)
to
PROFIBUS-
module
Instrument n
(Slave)
Master
max. number of instruments, without repeater: 32
max. number of bus users (Slave + Master): 126
Figure 2-41 Principle diagram SIPART DR22 via PROFIBUS-DP and bus plug to Master
Note line termination:
The RS 485 bus must be terminated with a characteristic impedance. To do this, the switch in
the bus connector must be switched "ON" in the "first" and "last" bus users. The switch may not
be "ON" in any of the other bus users. A detailed description and notes on cable laying and bus
cable laying can be found in the user's guide Decentral Peripheral System ET200.
Order number 6ES5 998-3ES12.
SIPART DR22 6DR2210
C79000-G7476-C154-03
3
RxD/TxD-P
390R
6
VP
390R
5
DGND
8
RxD/TxD-N
3
RxD/TxD-P
390R
6
VP
5 390R
DGND
8
RxD/TxD-N
RxD/TxD-A
RxD/TxD-B
2.2.4 Connection of the interface
PROFIBUS plug
B
ON
A
220R
A
B
B
OFF
220R
A
B
A
2 Installation
2.2 Electrical Connection
6ES7972-
165