Siemens 6GK7177-1MA20-0AA0 is a LOGO! CSM 12/24 unmanaged compact switch that creates a four-port Industrial Ethernet segment for a LOGO! installation. Its responsibility is to forward 10/100 Mbit/s frames between the controller, engineering station and other Ethernet nodes without adding switch configuration to the LOGO! program.
Panel power enters Siemens 6GK7177-1MA20-0AA0 from the protected 12/24 V DC branch, while each RJ45 port establishes its own physical link. The switching fabric learns source addresses and directs each frame to the appropriate port; controller logic and application protocols remain in the connected devices rather than inside the switch.
Mounted near the LOGO! base module, Siemens 6GK7177-1MA20-0AA0 keeps the local star connections within the cabinet and exposes power, link and traffic states through its LEDs. Troubleshooting therefore begins with switch supply and port link, then proceeds to device addressing and application communication only after the physical path is present.
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