Technical data

Active components

4.4 Active components for interfacing to PROFIBUS PA

PROFIBUS Network Manual

System Manual, Edition 04/2009, C79000-G8976-C124-03

Properties of the DP/PA coupler Ex [ia]

The DP/PA coupler Ex Ex [ia] (6ES7 157-0AD82-0XA0) has the following additional

characteristics:

● Type of protection EEx [ia] IIC T4

● Intrinsic safety

● Integrated, intrinsically safe power supply unit and integrated barrier

Configuring the DP/PA coupler

● The DP/PA coupler can be used in SIMATIC S5 and S7 and with all DP masters that

support 45.45 kbps.

● For the DP/PA coupler, you only need to set the transmission speed of 45.45 kbps for the

relevant DP network during configuration.

You then configure the PA field devices just as normal DP slaves using the DP

configuration tool and the appropriate GSD file. You can configure the PA field devices

with SIMATIC PDM or with any other vendorspecific software configuration tool.

● Configuration of the DP/PA coupler FDC 157-0 as a DP slave is necessary in the

following situations:

– If the diagnostic functions will be effective.

– If you want to operate the DP/PA couplers with ring redundancy or coupler

redundancy.

Further information

Operating instructions

DP/PA Coupler, DP/PA Link and Y Link Bus Couplers

(Bus links

(

http://support.automation.siemens.com/WW/view/en/1142696))

4.4.3 DP/PA link

Area of application

The DP/PA link is used for large quantity frameworks and high timing requirements.

The DP/PA link is a slave on the PROFIBUS DP and a master on the PROFIBUS PA. The

PLC/automation system addresses the field devices over the DP/PA link like a modular slave

whose modules are the PA devices.

Configuration of the DP/PA link is integrated extremely conveniently in the STEP 7

configuration software (V4.02 and higher). The DP/PA link can be operated on PROFIBUS

DP standard masters.

The GSD file required for operation on PROFIBUS DP standard masters can be downloaded

from the Internet (you will find more detailed information on the Internet

(

http://support.automation.siemens.com/WW/view/en/26562190)).