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6GK5205-3BF00-2AB2

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Siemens 6GK5205-3BF00-2AB2 is a SCALANCE XB205-3LD managed Layer 2 switch that links five copper devices with three long-distance single-mode fiber segments.
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Technical specifications for 6GK5205-3BF00-2AB2

  • Manufacturer:
    Siemens
  • Part Number:
    6GK5205-3BF00-2AB2
  • Product Family:
    Siemens SCALANCE
  • Product Type:
    SCALANCE XB205-3LD Managed Layer 2 Industrial Ethernet Switch
  • Stock:
    1
  • Electrical Ports:
    5 x RJ45
  • Electrical Data Rate:
    10/100 Mbit/s
  • Optical Ports:
    3 x SC
  • Optical Fiber Type:
    Single-mode glass fiber
  • Optical Data Rate:
    100 Mbit/s
  • Maximum Optical Distance:
    26 km
  • Console Interface:
    1 x RJ11
  • Management Interface:
    1 x RJ45
  • Rated Supply:
    24 V DC
  • Permitted Supply Range:
    19.2 to 28.8 V DC
  • Maximum Current Consumption:
    0.29 A
  • Power Consumption:
    7 W
  • Redundancy Protocols:
    HRP, MRP, MRP-I, STP and RSTP
  • VLAN Capacity:
    257 maximum
  • PROFINET Function:
    IO device, Conformance Class B
  • Protection Class:
    IP20
  • Operating Temperature:
    0 to 60 °C
  • Storage and Transport Temperature:
    -40 to 70 °C
  • Mounting:
    35 mm DIN rail
  • Industrial Security:
    IEC 62443-4-2 certified
  • Weight:
    0.966 lbs (0.438 kg)
  • Estimated shipping dimensions:
    8x10.9x11.7cm
  • Tariff Code:
    85176200
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Copper & Service Ports Long-Distance Fiber Layer 2 Control Power & Diagnostics

Features:

  • Five RJ45 links connect local 10/100 Mbit/s Industrial Ethernet devices.
  • Three single-mode SC ports extend 100 Mbit/s segments over distances up to 26 km.
  • Managed PROFINET, VLAN, diagnostics, and ring functions organize traffic and network recovery.
Copper frames entering Siemens 6GK5205-3BF00-2AB2 can be forwarded to the appropriate optical or electrical destination without changing the connected device protocol.

Dedicated service interfaces on 6GK5205-3BF00-2AB2 preserve all five RJ45 device ports for process-network connections.

The two DC input paths of 6GK5205-3BF00-2AB2 feed one switch while monitoring exposes the loss of either source.

The Siemens 6GK5205-3BF00-2AB2 SCALANCE XB205-3LD Managed Layer 2 Industrial Ethernet Switch may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK5205-3BF00-2AB2 SCALANCE XB205-3LD Managed Layer 2 Industrial Ethernet Switch Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Device Traffic and Local Access

  • Device links: Five RJ45 sockets negotiate 10 or 100 Mbit/s with copper network partners.
  • Management path: A separate RJ45 interface carries the documented management connection.
  • Console path: The RJ11 console connector supports local service access without using a device port.
  • Link adaptation: Autonegotiation and autocrossover align speed, duplex, and pair assignment with the connected peer.

Single-Mode Optical Paths

  • Optical group: Three SC interfaces carry switched Ethernet over single-mode glass fiber.
  • Link rate: Each optical connection operates at 100 Mbit/s.
  • Distance limit: A complete optical path may extend to 26 km when its attenuation budget remains within specification.
  • Commissioning check: Fiber type, connector condition, transmit/receive pairing, and remote optics must all match.

Segmentation and Redundant Paths

  • VLAN: Port membership separates selected traffic while the switch remains a Layer 2 device.
  • MRP family: MRP and MRP-I assign the documented roles in PROFINET media-redundancy structures.
  • Spanning tree: STP and RSTP prevent an unintended Ethernet loop by controlling alternate links.
  • Protocol boundary: The device forwards Ethernet frames but does not replace a Layer 3 router.

Supply Continuity and Fault Reporting

  • Redundant feeds: Two 24 V DC inputs can maintain the switch when one healthy source remains.
  • Signaling contact: The floating output reports configured supply, link, or device faults to external monitoring.
  • Front indicators: LED states identify power and port conditions before detailed management diagnostics are opened.
  • Cabinet installation: IP20 construction requires installation inside a suitable industrial enclosure.
Description
Siemens 6GK5205-3BF00-2AB2 is a SCALANCE XB205-3LD managed Layer 2 Industrial Ethernet switch. Five RJ45 ports collect 10/100 Mbit/s copper traffic, while three 100 Mbit/s SC interfaces carry the same switched network over single-mode fiber paths up to 26 km.

Management on 6GK5205-3BF00-2AB2 separates service access from normal device traffic through dedicated console and management connections. Web-based management, CLI, SNMP, and STEP 7 expose VLAN, port, topology, and diagnostic settings without consuming a device-facing RJ45 port.

Redundant 24 V DC feeds supply 6GK5205-3BF00-2AB2 through one terminal block, while the signaling contact and LEDs report configured power, link, or device faults. MRP, RSTP, and related Layer 2 redundancy functions control alternate paths rather than routing between IP networks.

Mounted on a DIN rail, 6GK5205-3BF00-2AB2 operates as a PROFINET Class B network component. Its optical interfaces require single-mode cable, matched SC connectors, correct transmit/receive pairing, and an end-to-end attenuation budget within the documented link limit.
Alternative Names
6GK52053BF002AB2 6GK5205 3BF00 2AB2 6GK 5205 3BF00 2AB2 Siemens 6GK5205-3BF00-2AB2 6GK5205-3BF00-2AB2 SCALANCE XB205-3LD SCALANCE XB205-3LD 6GK5205-3BF00-2AB2 6GK5205-3BFOO-2AB2 6GK52O5-3BF00-2AB2
Technical notes
The long-distance fiber variant Siemens 6GK5205-3BF00-2AB2 combines three single-mode SC paths with managed PROFINET, VLAN, and ring-redundancy functions.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why is single-mode fiber required for 6GK5205-3BF00-2AB2?
Siemens 6GK5205-3BF00-2AB2 uses long-distance SC optics designed for single-mode glass fiber, not the multimode medium used by other XB205-3 variants.
What must be checked before using the 26 km reach of 6GK5205-3BF00-2AB2?
The 6GK5205-3BF00-2AB2 optical budget must include fiber attenuation, connector losses, splices, and the matching remote transceiver.
Can 6GK5205-3BF00-2AB2 route between IP subnets?
No. Siemens 6GK5205-3BF00-2AB2 is a managed Layer 2 switch; its VLAN and redundancy functions do not provide Layer 3 routing.
Why can 6GK5205-3BF00-2AB2 report a fault while traffic still passes?
A lost redundant supply or monitored link can activate the 6GK5205-3BF00-2AB2 signaling contact while unaffected ports continue forwarding frames.
How should a ring be commissioned on 6GK5205-3BF00-2AB2?
Assign the intended ring ports and one supported redundancy method in 6GK5205-3BF00-2AB2, then verify topology and recovery diagnostics before service.
Which ports remain available during local service of 6GK5205-3BF00-2AB2?
The separate console and management interfaces of 6GK5205-3BF00-2AB2 leave all five device-facing RJ45 ports available for network traffic.