© Siemens AG 2007

Communication

PROFIBUS PA

Routers: DP/PA link and DP/PA coupler

Design

High Speed solution with DP/PA link

 

PROFIBUS master

 

2

S7-400

 

up to 12 Mbit/s

4

5

3

 

 

Low-cost solution with direct addressing

2

45.45 kbit/s

PROFIBUS DP

DP/PA coupler

PROFIBUS PA

 

DP/PA link

2

PROFIBUS PA

31.25 kbit/s

1

 

3

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

4

5

6

7

8

DP/PA link

IM 153-2 interface module (single/redundant)

DP/PA couplers (max. 5 per IM 153-2)

Slave on DP side - master on PA side

Max. 64 PA devices (244 bytes I/O data)

Configuration examples with DP/PA link and DP/PA coupler

DP/PA coupler

transparent for communication

Ex version 13.5 V / 110 mA

Non-Ex version 31 V / 1000 mA

DP/PA link:

The DP/PA link is a modular combination consisting of the

IM 153-2 High Feature PROFIBUS DP interface module (with op- tional redundancy) and up to 5 DP/PA couplers (Ex [i] or

9FDC 157-0) packaged in an S7-300 design.

All components of the DP/PA link are interconnected through the S7 backplane bus. Use of active bus modules on the backplane allows hot swapping of individual modules and redundancy of the IM 153-2 High Feature PROFIBUS DP interface modules and the FDC 157-0 DP/PA coupler.

The PS 307 or PS 305 load power supply can be used for the 24 V DC. With a redundant IM 153-2 High Feature interface module for PROFIBUS DP, it is also recommendable to have a redundant 24 V DC supply, e.g. with two PS 307/PS 305 load power supplies.

The PROFIBUS PA lines/rings designed with the DP/PA couplers are physically separated as regards current input, but form one bus system in communication terms. A PROFIBUS PA ring or a PROFIBUS PA line with coupler redundancy can be operated on each DP/PA link. Further PROFIBUS PA lines can be operated on this DP/PA link using individual couplers. The FDC 157-0 DP/PA couplers provided for the ring coupling or coupler redun- dancy must always be located at the right-hand end of a se- quence of up to 5 couplers.

The following basic components are available to configure the DP/PA link:

IM 153-2 High Feature interface module for extended temper- ature range

DP/PA coupler (Ex [i] and FDC 157-0)

Components for redundant design and for hot swapping

-DIN rail for hot swapping (as an alternative to the standard DIN rail)

-BM PS/IM for 1 load power supply and 1 IM 153-2 High Fea- ture module

-IM/IM (IM 157) bus module for two IM 153-2 High Feature modules, for redundant and non-redundant design and for extended temperature range

-DP/PA bus module for one DP/PA coupler Ex [i] or FDC 157-0, for extended temperature range (up to 5 DP/PA couplers possible per DP/PA link)

-DP/PA but module for 2 DP/PA coupler FDC 157-0, for ex- tended temperature range

Additive option:

PS 307 load power supply for 120/230 V AC; 24 V DC, version in 2, 5 or 10 A, or

PS 305 load power supply for 24/48/60/110 V DC; 24 V DC, 2 A

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Siemens ST PCS 7 · November 2007

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Siemens ST PCS 7 manual Design High Speed solution with DP/PA link