Description
Product Introduction
The Siemens 6GK5202-2BB00-2BA3 (SCALANCE XC202-2G) is a compact, managed Layer 2 industrial Ethernet switch engineered for demanding automation networks. Plant engineers specify this unit when combining local high-speed copper field connections with long-distance optical fiber uplinks in S7-1500 or PCS 7 DCS environments.
Equipped with two Gigabit RJ45 ports and two Gigabit ST optical ports, the XC202-2G delivers low-latency data throughput while offering robust network redundancy via MRP (Media Redundancy Protocol). In our field experience, deploying this exact unit allows seamless integration into TIA Portal, giving you full PROFINET diagnostics down to the port level without adding third-party network management overhead.
Key Technical Specifications
| Parameter | Value |
| Part Number | 6GK5202-2BB00-2BA3 |
| Model Name | SCALANCE XC202-2G |
| Manufacturer | Siemens |
| RJ45 Ports | 2x 10/100/1000 Mbps (Auto-Negotiation / Auto-MDI-X) |
| Fiber Ports | 2x 1000 Mbps ST (BFOC) Multimode Fiber Transceivers |
| Operating Voltage | Dual Redundant 24V DC (9.6V to 31.2V DC) |
| Network Protocols | PROFINET IO Device, EtherNet/IP, SNMP v1/v2c/v3, Web-Based Management |
| Redundancy Protocols | MRP (Media Redundancy Protocol), RSTP, STP |
| Enclosure Rating | IP20 Rugged Die-Cast Housing |
| Operating Temperature | -40°C to +70°C (-40°F to 158°F) |
Application Scenarios & The “Trench” Experience
A high-speed bottling facility experienced recurring network dropped packets whenever large variable frequency drives cycled on. The plant’s legacy unmanaged switch lacked noise isolation and port diagnostics, resulting in sporadic PROFINET bus faults that halted the filling line for 20 minutes at a time.
- Automotive Manufacturing – Robotic Cell Uplinks – Connects local robot controllers over copper while linking back to the main control room over noise-immune fiber optic lines.
- Oil & Gas Pipeline Skid – Remote Monitoring Nodes – Operates reliably in harsh temperature swings from -40°C to +70°C inside outdoor control cabinets.
- Water & Wastewater Facilities – Ring Topology Infrastructure – Provides fast ring redundancy (MRP) so a single cut fiber cable does not bring down lift station monitoring.
The system integrator replaced the unmanaged desktop switch with a 6GK5202-2BB00-2BA3. By running the fiber uplinks straight into the ST ports and configuring MRP ring redundancy in TIA Portal, the facility completely eliminated EMI-induced downtime and gained live port traffic visibility.
Transparency SOP: Quality Assurance & Testing
We do not just ship boxes; we test them on actual Siemens S7-1500 and PROFINET test racks. Every 6GK5202-2BB00-2BA3 undergoes the following verification process:
- Inbound Visual Inspection: Inspection of the sealed enclosure, DIN rail clip, terminal blocks, and optical dust caps to verify true factory-sealed or mint surplus condition.
- Redundant Power Supply Verification: Dual 24VDC power-up test to confirm primary and secondary power terminals transition properly without tripping internal protection.
- Port & Traffic Stress Testing: Full Gigabit line-rate throughput test on all RJ45 ports and optical power attenuation checks on the ST fiber interfaces using an optical power meter.
- Firmware & Web-GUI Audit: Accessing the onboard web server via management IP to clear legacy settings, update to the latest firmware revision, and check diagnostic logs.
- ESD & Protective Packaging: Sealed in anti-static shielding bags with custom-cut foam insert boxes to prevent shipping impacts.
6GK5202-2BB00-2BA3
6GK5202-2BB00-2BA3
The Veteran’s Tech Trap Guide (Crucial Value-Add)
- ⚠️ Mind the Fiber Connector Type: This module utilizes physical ST (BFOC) bayonet-style optical connectors, not SC or LC duplex snap-in connectors. If your existing plant fiber patch panel uses LC terminations, order your ST-to-LC fiber patch cables before install day. Trust me, finding an ST patch cord at 2 AM is impossible.
- ❗ C-PLUG Selection & Backup: Don’t forget to transfer your existing Siemens C-PLUG (removable storage medium) to the new switch slot before powering up. If configured properly, the C-PLUG automatically transfers the IP address and network topology configuration to the new switch without needing TIA Portal!
- ⚠️ Set the Select/Set Button Correctly: The front panel has a manual pushbutton for setting local fault contacts. Pushing this button incorrectly during installation can accidentally trigger a fault-relay latch, sending false alarm signals back to your PLC digital input card.
Frequently Asked Questions (FAQ for Conversion)
Q: Is the Siemens 6GK5202-2BB00-2BA3 a managed or unmanaged switch?
A: It is a fully managed Layer 2 industrial switch. It supports SNMP, Web-Based Management (WBM), PROFINET IO diagnostics, and ring redundancy protocols like MRP.
Q: Does this unit support standard 100Mbps optical links?
A: No, the two ST optical interfaces on the 6GK5202-2BB00-2BA3 are dedicated Gigabit (1000 Mbps) multimode ports. Ensure the device at the opposite end of the optical cable is also running at Gigabit speed.
Q: Can I integrate this switch directly into TIA Portal?
A: Yes. Siemens provides GSDML files for the SCALANCE XC-200 series. You can drag and drop the module into your TIA Portal hardware configuration to read real-time port states and diagnostic alarms directly inside S7 PLC logic.
Q: Does it require an external 24V supply on both power terminals to run?
A: No. It operates fine on a single 24VDC feed. However, wiring both redundant terminal sets to separate power supplies guarantees the switch stays live if one power supply fails.
Q: What warranty is included with this surplus/new unit?
A: We back all our new surplus and rig-tested 6GK5202-2BB00-2BA3 SCALANCE switches with a full 12-month replacement warranty.
Start Chat
