Siemens SIMATIC NET PROFIBUS User Manual

2-25

PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000

The DP/PA link consists of the IM 157 and up to a maximum of five DP/PA
couplers. The DP/PA link is a DP slave at the PROFIBUS-DP side and a PA
master at the PROFIBUS-PA side.

With the DP/PA link, you have an isolated interconnection between PROFIBUS-PA
and PROFIBUS-DP with transmission rates of 9.6 Kbps to 
12 Mbps.

The DP/PA link can only be used in SIMATIC S7.

Figure 2-16 below shows where the DP/PA link fits in.

PROFIBUS-DP

ET200X

Field level

Industrial Ethernet

IM 157

DP/PA coupler

1

2

3

4

5

PROFIBUS-PA

Field devices of PROFIBUS-PA

“Programming, Operating
and Monitoring”

SIMATIC PCS 7 or other
tool for parameter assign-
ment

PDM or other tool for para-
meter assignment

S7-DP master

Cell level

Process control
level

Gateway
S7-400

Figure 2-16

Location of the DP/PA Link

The DP/PA link must be installed outside the hazardous area.

The DP/PA link is configured with STEP 7, Version 4.02 or higher.