Siemens SIMATIC NET System Manual page 347

Functions
The individual devices have the following functions:
CSM 1277 unmanaged
● Display LEDs for diagnostics and for the status of the respective Industrial Ethernet ports
● Autosensing and autocrossover functions for automatic data detection
● Replication of the Ethernet interfaces of the SIMATIC S7-1200 systems
● The module can be exchanged without a programming device
● Operation without a fan and low maintenance design
Various network topologies can be implemented with the compact switch module CSM 1277.
● Setup of a small local Industrial Ethernet network with three further nodes.
● Connection of the SIMATIC S7-1200 in a linear bus structure
At least one RJ45 connection of the SIMATIC S7-1200 remains free, for example, for
connecting a programming device.
● Connection of the SIMATIC S7-1200 to a higher-level network with a tree or star structure
At least two RJ45 connections of the SIMATIC S7-1200 remain free, for example, for
connecting a PG/OP.
SIPLUS NET CSM 1277
The technical concept of the compact switch module SIPLUS NET CSM corresponds to the
functions and characteristics of the CSM 1277 unmanaged. The SIPLUS NET 1277 module
is intended for unusual environmental loads at ambient temperatures of 0 °C to +55 °C.
Note
SIPLUS
The SIPLUS extreme products are based on the Siemens Industry standard products.
Detailed information and the technical documentation on SIPLUS is available in the portal of
Siemens AG under SIPLUS
extreme/Pages/Default.aspx).
Article numbers
Device
CSM 1277
SIPLUS NET CSM 1277 Unmanaged switch for connecting a SIPLUS S7-
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
(https://w3.siemens.com/mcms/siplus/en/siplus-
Description
Unmanaged switch for connecting a SIMATIC
S7-1200 and up to three further nodes to Indus-
trial Ethernet, 4x 10/100 Mbps RJ45 ports
1200 and up to three further nodes to Industrial
Ethernet, 4x 10/100 Mbps RJ45 ports
Ambient temperature from 0 °C to +55 °C (for
exceptional environmental load)
Compact switch module
9.2 CSM 1277
Article number
6GK7277-1AA10-0AA0
6AG1277-1AA00-4AA0
347