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Product Describe:
Siemens 6GK5308-2FM10-2AA3 is a SCALANCE X308-2LD managed Industrial Ethernet switch with seven 10/100 Mbit/s RJ45 ports, one 10/100/1000 Mbit/s RJ45 port and two 1000 Mbit/s single-mode SC fiber ports.
In a resilient plant network, Siemens 6GK5308-2FM10-2AA3 coordinates copper and long-distance single-mode fiber segments while retaining managed switching and ring-control functions.
Eight copper ports combine seven Fast Ethernet paths with one gigabit-capable RJ45 path.
Two 1000 Mbit/s single-mode SC ports support the documented long-distance optical uplinks.
RSTP, VLAN and IGMP functions provide managed traffic control for the installed topology.
The supplied C-PLUG retains the approved device configuration for controlled replacement.
Commissioning ties the stored C-PLUG configuration, PROFINET device assignment, signaling contact and redundancy role to the two optical paths and eight copper interfaces.
Important Notice: match the X308-2LD article number, SC fiber type, C-PLUG record and configured ring position before replacement.
The first document organizes exact technical resources and interface decisions; the second provides a separate field sequence for readiness, installation, verification and handover.
Fiber-linked control cells
Connects separated automation areas through two single-mode gigabit SC routes.
Managed plant backbones
Segments copper devices with VLAN and monitored switching functions.
Redundant Ethernet rings
Operates in the assigned ring role with the integrated redundancy manager.
PROFINET infrastructure
Presents the configured switch as a PROFINET IO device for diagnostic visibility.
Apply these checks to the exact Siemens 6GK5308-2FM10-2AA3 installation before isolation, replacement or release.
1
Confirm the complete 6GK5308-2FM10-2AA3 marking and X308-2LD identity before work.
2
Export the active configuration and record the installed C-PLUG before isolation.
3
Label all seven Fast Ethernet ports, the gigabit RJ45 port and both SC fiber routes.
4
Verify that each optical path uses the retained single-mode SC connection.
5
Prove both 18-32 V DC supply paths and the signaling-contact circuit safe.
6
Restore the ring-manager role, VLAN, RSTP, IGMP and PROFINET assignments.
7
Compare LED states and the error signaling contact after energization.
8
Test copper forwarding, both fiber uplinks and redundancy recovery before release.
Technical notes
Retain the C-PLUG configuration, single-mode SC assignments, signaling contact and network-management settings. After replacement, prove all eight copper interfaces, both fiber uplinks and redundancy recovery under the approved maintenance plan.