Siemens SIMATIC NET PROFIBUS manual Properties of the DP/PA Coupler General

Topologies of SIMATIC NET PROFIBUS Networks

Properties of the DP/PA Coupler (General)

The DP/PA coupler has the following characteristics:

SElectrical isolation between PROFIBUS-DP and PROFIBUS-PA

SConversion of the physical transmission mechanism between RS-485 and IEC 61158-2

SDiagnostics using LEDs

STransmission rate on PROFIBUS-DP 45.45 Kbps

STransmission rate on PROFIBUS-PA 31.25 Kbps

SIntegrated power supply unit

Properties of the DP/PA Coupler Ex [i]

The DP/PA coupler Ex [i] (6ES7 157-0AD00-0XA0) has the following additional characteristics:

SType of Protection EEx [ia] II C

SIntrinsic safety

SIntegrated, intrinsically safe power supply unit and integrated barrier

The DP/PA coupler Ex [i] (6ES7 157-0AD80-0XA0) has the following characteristics that differ from the DP/PA coupler EX [i] (6ES7 157-0AD00-0XA0):

SType of protection EEx [ib] II C

SExtended environmental conditions (SIMATIC outdoor)

Configuring the DP/PA Coupler

SThe DP/PA coupler can be used in SIMATIC S5 and S7 and with all DP masters that support 45.45 Kbps.

SThe DP/PA coupler does not need to be configured. You must only set the transmission rate 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 vendor-specific software configuration tool.

2-24	PROFIBUS Networks SIMATIC NET
	6GK1970-5CA20-0AA1 Release 2 05/2000