Siemens AS 488/TM Connection of distributed I/Os, EXM 478 expansion module 6ES7 478-2AC00-0AC0

This catalog is out of date, see note on page 3

AS 488 in SIMATIC design

Connection of distributed I/Os

■Overview

All versions of the AS 488/TM automation system can be operat- ed with distributed process I/Os on the PROFIBUS-DP. The PROFIBUS-DP fieldbus is standardized according to EN 50 170, Part 3. It permits communication between the automation sys- tems and distributed I/O devices from the ET 200 range, simple DP-oriented operation and monitoring devices, as well as PROFIBUS field devices conforming to the standard.

In addition to the ET 200 M I/O devices specially tailored for pro- cess engineering with a wide selection of signal and function modules from the SIMATIC S7-300 range, it is also possible to use SIMATIC ET 200B, ET 200S, ET 200iS (available soon),

ET 200X or ET 200U (no longer actively marketed) systems as process I/Os on PROFIBUS-DP. When using the DP interfaces integrated in the CPU modules of the SIMATIC S7-300, it is also possible to implement a simple slave connection to the AS 488/TM. Gateway modules on the PROFIBUS-DP (DP/PA link, DP/AS-i link, DP/DP coupler) additionally permit access to the PROFIBUS-PA and AS-I fieldbuses and to the I/O buses of SIMATIC PCS 7, S7-300, S7-400 or systems from other vendors.

Up to 122 stations can be connected via each of the two physi- cally isolated lines of the PROFIBUS-DP to an AS 488/TM auto- mation system. The AS 488/TM functions in this case as the mas- ter. Data transmission is possible via a two-wire cable or fiber- optic cable.

Each of the two PROFIBUS-DP lines is connected to the

AS 488/TM via an IF 964-DP interface module inserted in the EXM 478 extension module.

The second PROFIBUS-DP line is optional. To activate the AS in- terface for the second PROFIBUS-DP line, DP2-INI initialization must be loaded onto the memory card with the system software using the commissioning terminal. The DP2-INI initialization must be ordered separately on a 3.5-inch diskette.

■Ordering Data

	Order No.
EXM 478 expansion module	6ES7 478-2AC00-0AC0

to accommodate 3 interface mod- ules

Required 1 x for each of the max. 2 DP lines with electrical version of PROFIBUS-DP:

IF 964-DP interface module	6ES7 964-2AA01-0AB0
Required 1 x for each of the max.
2 DP lines with fiber-optic cable
version of PROFIBUS-DP:
IF 964-DP interface module	6ES7 964-2AA01-0AB0
OLM/G12 optical link module	6GK1 502-3CB10
Connecting cable 830-1 for	6XV1 830-1CH30
PROFIBUS, 3 m
Additionally required for 2nd
DP line (can be repeatedly used):
DP2-INI initialization	C79451-A3496-D900

3.5-inch diskette with initialization files and documentation in Ger- man and English

5/6 Siemens PLT 112 · 2002