Csm 377 - Siemens SIMATIC NET System Manual

Compact switch module

9.1 CSM 377

Example of a topology
Figure 9-1
9.1 CSM 377
Description
Figure 9-2
The Compact Switch Module CSM 377 is an unmanaged switch for connecting a SIMATIC
S7-300 module with an integrated PROFINET interface or with an Industrial Ethernet CP or
ET 200M to an Industrial Ethernet network. The CSM 377 is suitable for the design of line,
tree and star structures. The CSM 377 is intended for integration of small machines into
existing automation networks or for standalone operation of the machines. It offers a cost-
effective solution for the implementation of small, local Ethernet networks.
The module has a rugged plastic housing with IP20 degree of protection and is intended for
installation on a SIMATIC S7-300 standard rail. It has no connection to the backplane bus of
the S7-300 or ET 200M and must therefore be plugged in at the start (first module to the left
of the CPU) or at the end (last module far right) of the S7-300 station. The connection to the
CPU of the S7-300 takes place either via an Industrial Ethernet cable or an Industrial
Ethernet twisted pair cord.
344
Linear bus structure with CSM 377
CSM 377 unmanaged
System Manual, 09/2019, C79000-G8976-C242-10
Industrial Ethernet