Siemens SIMATIC NET PROFIBUS manual 4 DP/PA Link, Definition

Topologies of SIMATIC NET PROFIBUS Networks

2.5.4DP/PA Link

Definition

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.

Uses

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.

Process control	Industrial Ethernet
level
S7-DP master
Gateway
S7-400

“Programming, Operating and Monitoring”

SIMATIC PCS 7 or other tool for parameter assign- ment

PDM or other tool for para- meter assignment

Cell level

PROFIBUS-DP

DP/PA Link
	DP/PA coupler
1	2	3	4	5
IM 157
ET200X

PROFIBUS-PA

Field level

Field devices of PROFIBUS-PA

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.

PROFIBUS Networks SIMATIC NET	2-25
6GK1970-5CA20-0AA1 Release 2 05/2000