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3 dp/pa coupler – Siemens SIMATIC NET PROFIBUS User Manual

Page 49

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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.