GE IS420ESWAH3A | 8-Port IONet Switch for Mark VIe – Field Service Notes
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GE IS420ESWAH3A | 8-Port IONet Switch for Mark VIe – Field Service Notes

  • Model: IS420ESWAH3A
  • Alt. P/N: ESWAH3A
  • Product Series: Speedtronic Mark VIe / Mark VIeS
  • Hardware Type: Industrial IONet Ethernet switch
  • Key Feature: 8× 10/100Base-TX copper ports (no fiber)
  • Primary Field Use: Local copper-only control network for Mark VIe turbine I/O
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Description

Component Snapshot At-a-Glance

  • Model: IS420ESWAH3A
  • Alt. P/N: ESWAH3A
  • Product Series: Speedtronic Mark VIe / Mark VIeS
  • Hardware Type: Industrial IONet Ethernet switch
  • Key Feature: 8× 10/100Base-TX copper ports (no fiber)
  • Primary Field Use: Local copper-only control network for Mark VIe turbine I/O

Hard-Numbers: Technical Specifications

  • Standards: IEEE 802.3, 802.3u, 802.3x, IEEE 1588 PTP
  • Copper Ports: 8× RJ45, 10/100 Mbps, auto-negotiation, HP-MDIX
  • Fiber Ports: 0 (copper-only variant)
  • Buffer Memory: 256 KB
  • MAC Table: 4K addresses
  • Operating Temp: -40°C to +70°C
  • Power Input: 24–28 VDC (dual redundant, diode-OR’d)
  • Power Draw: 5 W typical, 8 W max
  • Isolation: 1500 Vrms port-to-bus
  • Mounting: DIN-rail or panel-mount
  • Dimensions: 138 × 86 × 56 mm
  • Weight: 0.5 kg
  • Environmental: G3 conformal coating, salt-fog tested

 

The Real-World Problem It Solves

Fiber ports go unused in local cabinet I/O loops, wasting space and creating failure points. This copper-only switch eliminates unnecessary optics and cuts EMI risks in tight control panels.

Where you’ll typically find it:

  • Local I/O racks in Mark VIe turbine control cabinets
  • Class 2, Zone 2 hazardous locations (refineries, offshore)
  • Small-scale turbine packages with short copper runs

Bottom line: It delivers reliable, low-power switching for local copper I/O networks.

 

Hardware Architecture & Under-the-Hood Logic

Layer 2 managed switch with autonomous switching logic and no CPU dependency. Runs QNX Neutrino RTOS for deterministic IONet performance. Convection-cooled, no moving parts.

  1. Ingests Ethernet frames from controllers and I/O modules.
  2. Forwards packets via MAC lookup with <5 ms IONet cycle time.
  3. Applies IEEE 802.3x flow control to prevent buffer overflow.
  4. Syncs to system time via IEEE 1588 PTP (1 µs precision).
  5. Triggers LED fault codes on port loss or voltage faults.

Field Service Pitfalls: What Rookies Get Wrong

Redundant Power Wiring ErrorRookies tie both power inputs to the same supply. Loses all ports on supply failure.

  • Field Rule: Use two separate 24 VDC sources; diode-OR design ensures true redundancy.

DIN-Rail Orientation & VibrationPerpendicular mounting without BVP2 clips causes chassis resonance. Vibration cracks port solder joints.

  • Quick Fix: Use BVP1 for parallel; BVP2 only for perpendicular DIN-rail mounting.

Unused Port Storm FilteringLeaving unused ports active creates broadcast storms. Latency spikes lock up I/O loops.

  • Field Rule: Disable all unused ports via Toolbox or DIP switch.

 

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

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