GE 336A4940DNP517FX Ruggedized Managed Ethernet Switch

Product Overview

GE 336A4940DNP517FX Ruggedized Managed Ethernet Switch for Harsh Industrial Environments

The GE 336A4940DNP517FX is a ruggedized, DIN-rail-mounted, 5-port managed industrial Ethernet switch engineered for continuous, fault-tolerant operation in the most demanding automation and process control environments. Designed as a core network infrastructure component within GE’s Mark VI turbine control and industrial automation ecosystem, this switch delivers deterministic, low-latency Ethernet communication across PLC networks, DCS backbones, and distributed I/O architectures where network interruption is simply not an option.

In heavy industrial facilities — including oil and gas platforms, coal-fired and combined-cycle power plants, water treatment stations, metallurgical smelters, and mining operations — network switches are exposed to extreme temperature swings, high-humidity condensation cycles, pervasive airborne particulates, continuous mechanical vibration, and severe electromagnetic interference (EMI) generated by variable frequency drives (VFDs), large motor starters, and high-voltage bus systems. The 336A4940DNP517FX is purpose-built to withstand these conditions without performance degradation, making it a trusted backbone component for mission-critical control loops.

Rugged Specifications Table

Comprehensive Protection Solutions

The 336A4940DNP517FX does not operate in isolation — it is the communications backbone that ties together an entire suite of protection, control, and safety devices within a control cabinet or distributed control architecture. In a typical GE Mark VI turbine control panel, this switch interconnects the GE IS200TTURH1CBB turbine protection module and the GE IS200DSPXH1D digital signal processor board, ensuring that real-time trip signals and diagnostic data traverse the network with sub-millisecond latency. Alongside these, the GE IS200EXHSG2A excitation controller relies on stable Ethernet connectivity to synchronize generator excitation commands with the broader DCS.

In process industries where safety integrity is paramount, the switch supports communication between GE Mark VIe safety I/O modules and the plant’s safety instrumented system (SIS), maintaining IEC 61511-compliant data paths even under high EMI loads from nearby ABB ACS880 variable frequency drives or Siemens SINAMICS G120 inverters. The fiber uplink port (100BASE-FX) provides galvanic isolation between control cabinet segments, eliminating ground loop interference — a critical feature when the switch is co-located with Phoenix Contact QUINT-PS/24DC/24DC/10 industrial power supplies and Weidmüller terminal block assemblies in high-density panels.

For facilities running Rockwell Automation ControlLogix 1756-EN2T EtherNet/IP communication modules, the 336A4940DNP517FX’s IGMP snooping and VLAN segmentation capabilities prevent multicast flooding that would otherwise degrade I/O scan rates across distributed Allen-Bradley 1734 POINT I/O nodes. Similarly, in Siemens PROFINET environments, the switch’s RSTP (Rapid Spanning Tree Protocol) support ensures ring redundancy recovery in under 50 milliseconds, protecting Siemens ET 200SP distributed I/O stations from communication timeouts during cable fault events.

Application in Critical Infrastructure

In oil and gas upstream and midstream facilities, the 336A4940DNP517FX is deployed within explosion-proof control enclosures (Ex e / Ex d rated cabinets) to network GE Mark VI turbine controllers managing gas compression trains. The switch’s wide operating temperature range and vibration tolerance make it suitable for offshore platform environments where salt-laden air and constant mechanical motion would rapidly degrade commercial-grade networking equipment.

In coal-fired and combined-cycle power plants, the switch forms the Ethernet backbone of the turbine control system, linking protection relays, excitation controllers, and HMI workstations. Plant operators depend on its managed capabilities — VLAN isolation, SNMP monitoring, and port mirroring — to segment turbine control traffic from plant-wide SCADA networks, reducing cybersecurity exposure while maintaining real-time control responsiveness.

In mining and mineral processing operations, where conveyor drives, crushers, and ball mills generate intense electrical noise, the 336A4940DNP517FX’s IEC 61000-4 EMC compliance ensures that PLC-to-PLC communications remain error-free. Its DIN-rail form factor allows direct integration into motor control centers (MCCs) and remote I/O panels without requiring additional mounting hardware.

In water and wastewater treatment plants, the switch enables reliable communication between SCADA servers and distributed pump station controllers, supporting continuous 24/7 operations where any network outage translates directly into regulatory non-compliance and potential environmental incidents.

In metallurgical and steel production facilities, the switch withstands the radiated heat, electromagnetic interference from arc furnaces, and airborne metallic particulates that characterize these environments, maintaining stable Ethernet links between rolling mill PLCs, quality inspection systems, and plant historians.

Security & Quality FAQ

Q1: Does the GE 336A4940DNP517FX come with a warranty?
Yes. Every unit shipped by TOPNLMS carries a 12-month quality warranty from the date of delivery. If the module exhibits any functional defect within this period under normal operating conditions, we provide replacement or full technical support at no additional cost. Our warranty commitment reflects our confidence in the quality of every unit we stock and test.

Q2: How is each unit tested before shipment?
All 336A4940DNP517FX units undergo a pre-shipment functional inspection that includes power-on verification, port link-up testing across all five ports, management interface accessibility checks, and visual inspection for physical integrity. Units that do not pass our inspection protocol are quarantined and not offered for sale. This ensures that every module you receive is operationally verified and ready for installation.

Q3: Is this switch compatible with my existing GE Mark VI or Mark VIe control system?
Yes. The 336A4940DNP517FX is a native component of the GE Mark VI industrial control platform and is fully compatible with Mark VI and Mark VIe system architectures. It is also interoperable with third-party Ethernet/IP, PROFINET, and Modbus TCP networks when configured appropriately. If you have specific compatibility questions regarding your plant’s network topology, our technical team is available to advise prior to purchase.

Q4: Can TOPNLMS support long-term or repeat procurement of this module?
Absolutely. TOPNLMS maintains dedicated inventory of GE Mark VI series components, including the 336A4940DNP517FX, to support both emergency spare-part replacement and planned maintenance procurement programs. We offer stable pricing, consistent lead times, and the ability to fulfill repeat orders for MRO (Maintenance, Repair & Operations) programs. Contact our team to discuss blanket order arrangements or priority stock reservations for your facility.