Siemens SIMATIC NET PROFIBUS - Manual (Page 49)

Topologies of SIMATIC NET PROFIBUS Networks
2-23
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
2.5.3 DP/PA Coupler
Figure 2-15 below illustrates how the DP/PA coupler is included in the system.
DP master
Process control
level
PROFIBUS-DP
PROFIBUS-PA
ET200X
Field level
Explosion-protected
area
DP/PA coupler Ex [i] DP/PA coupler
“Programming, Operating
and Monitoring”
SIMATIC PCS 7 or other
tool for parameter assign-
ment
Industrial Ethernet
PDM or other tool for parame-
ter assignment
Cell level
Figure 2-15 Linking the DP/PA Coupler into the System
Uses of the DP/PA Coupler
The DP/PA coupler is available in two versions:
S
DP/PA coupler Ex [i]: You can attach all field devices certified for
PROFIBUS-PA and that are located within the hazardous area.
S DP/PA coupler: You can attach all field devices that are certified for
PROFIBUS-PA and that are outside the hazardous area.
The DP/PA coupler is an accompanying component according to EN 50014 or
EN 50020 and must be installed outside the hazardous area.