Siemens AS 488/TM manual CS-L2 bridge

This catalog is out of date, see note on page 3

■Overview

The CS-L2 bridge connects the CS 275 and PROFIBUS-TM bus systems, converts their protocols, and permits analog and bina- ry value coupling between automation systems on the two bus systems, e.g. send/receive AKS, BKS and MKS telegrams in both directions.

The CS-L2 bridge receives status and I & C messages from sta- tions on the CS 275 bus, and passes them on to PROFIBUS-TM stations. The same applies in the opposite direction. The bridge passes on time telegrams in both directions.

The CS-L2 bridge is also used to transmit telegrams for the "Read parameters" and "Write parameters" functions between stations on the CS 275 bus and the operation and monitoring systems on the PROFIBUS-TM bus.

Bus communication

CS-L2 bridge

CS-L2 bridge

The hardware of the CS-L2 bridge is largely identical to that of the AS 488/TM system (UR2 rack, power supply modules, CPU, interface modules and components for connection to CS 275 and PROFIBUS-TM). Connection to the CS 275 local bus is via the TPM 478 communications module, connection to the PROFI- BUS-TM via the EXM 478 extension module with IF 964 interface module.

Limits:

The CS-L2 bridge only connects the CS 275 bus system to the PROFIBUS-TM bus system; it does not support interfacing to other PROFIBUS networks such as e.g. PROFIBUS-DP or PROFIBUS-FMS. However, PROFIBUS-TM and PROFIBUS-DP can be operated in parallel on a common PROFIBUS medium in friendly coexistence.

The PROFIBUS-AG/AG coupling is an open solution based on PROFIBUS for data exchange between AS 488/TM and

S7 automation systems.

Design of CS-L2 bridge for installation in cabinet (left) and for wall mounting (right)

Siemens PLT 112 · 2002 9/7