Siemens 6GK5116-0BA00-2AA3 Industrial Ethernet Switch – SCALANCE X-100

Siemens 6GK5116-0BA00-2AA3 — 16-Port Unmanaged Fast Ethernet Switch for Field-Level Industrial Networks

The 6GK5116-0BA00-2AA3 occupies a well-defined position in the SCALANCE X-100 product family: a 16-port, 10/100 Mbps unmanaged Layer 2 switch engineered for direct integration into PROFINET IO topologies, machine-level LAN segments, and distributed control architectures where zero-configuration deployment is a hard requirement. Unlike managed counterparts that introduce SNMP polling overhead and firmware dependency cycles, this unit operates as a transparent MAC-learning bridge — frames arrive, the internal 4K-entry CAM table resolves the destination port, and the packet is forwarded at wire speed with a measured port-to-port store-and-forward latency below 10 µs. That figure is not incidental; it is the threshold that keeps the switch within PROFINET RT Class 1 cycle-time budgets without requiring IRT-capable hardware.

The physical architecture centers on a single-chip switching ASIC with an integrated 24 V DC power management block. The front-terminal power connector accepts 18–32 V DC, covering the full tolerance band of standard 24 V DC industrial rail supplies without requiring an intermediate regulator. A floating-contact fault relay output — rated for 24 V DC / 100 mA — closes on power loss or internal fault, feeding directly into a PLC digital input or SCADA alarm concentrator. This eliminates the need for an external power monitor relay in most panel designs, reducing BOM count and wiring complexity.

Thermal management is passive: no fan, no moving parts. The operating envelope of −40 °C to +70 °C is validated against IEC 60068-2-1 (cold) and IEC 60068-2-2 (dry heat) test procedures, making the unit suitable for outdoor junction boxes in northern European climates and unventilated enclosures in foundry environments alike. The IP30 enclosure rating addresses finger-safe terminal access in open-rack panel installations; for wash-down or outdoor exposure, the SCALANCE XB-200 series with IP65/67 ratings is the appropriate alternative.

EMC performance is governed by EN 61000-6-2 (industrial immunity) and EN 61000-6-4 (industrial emissions). The PCB layout employs ground-plane segmentation between the switching fabric and the power supply section, with common-mode chokes on each RJ45 port to suppress conducted interference from variable-frequency drives and servo amplifiers — the dominant EMC aggressors in machine-building environments. ATEX Zone 2 and FM Class I Division 2 certifications extend deployment eligibility to petrochemical processing areas where explosive atmospheres may be present intermittently.

DIN-rail mounting uses the standard 35 mm omega rail clip integrated into the base of the housing. The 60 mm width allows 16 units to occupy a single 1-meter DIN rail segment with standard 5 mm spacing — a relevant figure when designing high-density patch panels for large PROFINET IO subnets. The unit is also compatible with the Siemens S7-300 mounting rail, enabling co-location with CPU and I/O modules in the same rack without additional adapters.

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Technical Parameters

Hardware Logical Analysis

The switching ASIC in the 6GK5116-0BA00-2AA3 implements a shared-memory crossbar fabric. Each of the 16 ports has a dedicated ingress FIFO buffer; frames are written to shared SRAM and the crossbar scheduler resolves output port contention using a round-robin arbitration scheme with head-of-line blocking prevention. This architecture guarantees that a burst on one port cannot starve traffic on adjacent ports — a property that matters when mixing PROFINET IO cyclic data (small, periodic frames) with HMI or SCADA traffic (larger, aperiodic frames) on the same switch.

Each RJ45 port integrates a dedicated PHY with auto-negotiation per IEEE 802.3u and auto-MDI/MDIX per IEEE 802.3-2005 Clause 40. The PHY includes a baseline wander compensation circuit that maintains signal integrity on Cat5e cable runs approaching the 100 m limit — relevant in large factory floor installations where cable routing through cable trays introduces additional capacitive loading.

EMC hardening at the port level uses a combination of common-mode chokes (CMC) on the differential pairs and transient voltage suppression (TVS) diodes on the shield ground path. The CMC suppresses high-frequency common-mode noise injected by VFD motor cables running parallel to Ethernet infrastructure — a scenario that routinely causes packet errors in switches without this protection. The TVS diodes clamp ESD events to safe levels per IEC 61000-4-2 Level 4 (±8 kV contact, ±15 kV air discharge), protecting the PHY silicon from electrostatic discharge during cable insertion in live panels.

The power supply section uses a synchronous buck converter operating at a fixed switching frequency above 200 kHz, placing the fundamental harmonic well above the industrial EMC immunity test band (up to 80 MHz per EN 61000-4-6). The converter output is filtered with a multi-stage LC network, achieving a ripple voltage below 50 mV peak-to-peak on the 3.3 V ASIC supply rail — within the tolerance margin of the switching ASIC’s internal voltage regulator.

System Integration Benefits

• Zero-overhead commissioning: No IP address assignment, no SNMP community string, no firmware update cycle. The switch is operational within 30 seconds of power application — a measurable reduction in machine commissioning time on production lines with tight installation schedules.
• PROFINET RT Class 1 compliance: The sub-10 µs store-and-forward latency keeps the switch within the timing budget for PROFINET RT cycle times down to 1 ms, supporting standard IO device update rates without requiring IRT-capable infrastructure.
• Deterministic MAC forwarding: The 4K CAM table with 300-second aging prevents MAC table overflow flooding in subnets with up to 4,096 unique endpoints — sufficient for any field-level PROFINET IO subnet in practice.
• Fault relay integration: The floating-contact relay output maps directly to a PLC digital input (DI) channel, enabling automated alarm generation in the PLC program without additional monitoring hardware or software polling.
• Dual power terminal redundancy: Two independent 24 V DC input terminals allow connection to separate power supply units. Loss of one supply does not interrupt switching operation; the fault relay signals the event to the control system for maintenance scheduling.
• TIA Portal topology recognition: The switch is recognized as a network node in Siemens TIA Portal V13 and later, enabling accurate network topology documentation and neighbor detection via LLDP-MED passive listening (the switch does not originate LLDP frames but does not strip them).
• Wide thermal envelope for cabinet-free deployment: The −40 °C to +70 °C rating allows installation in unheated outdoor junction boxes, eliminating the cost and maintenance burden of thermostatically controlled enclosure heaters in cold-climate installations.
• ATEX Zone 2 / FM Div 2 deployment: Certified for use in areas where explosive gas atmospheres may be present under abnormal conditions, expanding the switch’s applicability to upstream oil and gas, chemical processing, and pharmaceutical manufacturing without zone segregation of the network infrastructure.
• Compact 60 mm DIN-rail footprint: Allows high-density panel layouts; 16 units fit within 1 meter of DIN rail with standard spacing, supporting large PROFINET IO subnets within a single control cabinet.
• No software license dependency: Unlike managed switches that may require Siemens SINEMA or third-party NMS licenses for full functionality, the 6GK5116-0BA00-2AA3 delivers its complete feature set without any software entitlement — reducing total cost of ownership over the product lifecycle.

Quality Assurance & Global Logistics

Every 6GK5116-0BA00-2AA3 unit dispatched from our Xiamen facility is a genuine Siemens-manufactured component. Pre-shipment verification includes authentication of the Siemens holographic security label, cross-referencing the unit serial number against the Siemens Industry Online Support (SIOS) traceability database, and physical inspection of all 16 RJ45 ports for contact integrity and locking tab function. Units sourced from authorized distribution channels are accompanied by original Siemens packaging and, where available, the original Certificate of Conformity (CoC).

Storage conditions at our Xiamen warehouse comply with IEC 61340-5-1 ESD protection requirements: humidity-controlled environment (40–60 % RH), ESD-safe shelving, and anti-static packaging for all units. This preserves the electrical integrity of the PHY and ASIC silicon during extended storage periods.

Logistics from Xiamen, China to global destinations are handled via DHL Express, FedEx International Priority, and SF Express International, with typical transit times of 3–7 business days to Europe, North America, Southeast Asia, and the Middle East. All shipments include a commercial invoice, packing list, and tracking number issued within 24 hours of dispatch. Export classification is managed under HS Code 8517.62 (network switching apparatus); customers in regulated markets receive full export documentation for customs clearance. The 12-month warranty covers manufacturing defects; RMA processing is initiated within 48 hours of a documented fault report.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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