Siemens SIMATIC NET PROFIBUS Owner's Manual page 47

Design
The DP/DP coupler is installed in a compact, 40 mm wide casing.
The module can be installed (vertically when possible) on a standard rail with no
gaps being necessary.
The coupler is attached to each PROFIBUS-DP network via an integrated 9-pin
sub-D connector.
Master OP 25
À
2
Master
S7-400
2
2
Master
PG/PC/OP
À
À
2 LAN cable for PROFIBUS
Figure 2-14 Configuration Example of the DP/DP Coupler
How the DP/DP Coupler Works
The DP/DP coupler permanently copies output data of one network to the input
data of the other network (and vice-versa).
Parameter Assignment
The PROFIBUS-DP addresses are set using two DIP switches on the top of the
device. The configuration is set using the GSD file and the configuration tool of the
attached PROFIBUS-DP master. The data length is set with the relevant
configuration tool.
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Topologies of SIMATIC NET PROFIBUS Networks
SIEMENS
DP/DP COUPLER
Master
S7-300
À Slave
ET 200M
2
2
Slave
ET 200M
2
À
2-21