GE IS420ESWBH3A | 16-Port Copper IONet Switch – Mark VIe Field Notes

  • Model:
  • Alt. P/N: ESWBH3A
  • Series: Speedtronic Mark VIe / Mark VIeS
  • Type: Unmanaged industrial IONet Ethernet switch
  • Key Feature: 16× 10/100Base-TX RJ45 (copper only) — NO FIBER PORTS
  • Primary Use: Local high-density I/O networking in control panels (short-range copper only)

 

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Description

Hard-Numbers: Technical Specifications

  • Standards: IEEE 802.3, 802.3u, 802.3x, HP-MDIX
  • Copper Ports: 16× RJ45, 10/100 Mbps, auto-negotiation, full/half duplex
  • Fiber Ports: 0
  • Buffer Memory: 256 KB
  • MAC Table: 4K addresses
  • Switching Capacity: 3.2 Gbps
  • Operating Temp: -40°C to +70°C
  • Power Input: 24–28 VDC (dual redundant, diode-OR’d)
  • Power Draw: 8 W typical, 10 W max
  • Isolation: 1500 Vrms port-to-backplane
  • Cooling: Convection (no fan)
  • Mounting: DIN-rail (BVP1/BVP4 clips) or panel-mount
  • Dimensions: 138 × 86 × 56 mm
  • Weight: 0.91 kg (2 lbs)
  • Environmental: G3 conformal coating, Class 1 Div 2 / Zone 2 hazardous location rated
  • Indicators: Link (green=100M, yellow=10M), Activity, Duplex, Power
IS420ESWBH3A

IS420ESWBH3A

The Real-World Problem It Solves

Local I/O panels need maximum copper ports for nearby modules with no long-distance fiber requirement. This unit provides 16 copper ports in a compact, rugged form factor—ideal for dense local I/O networks where fiber uplinks are unnecessary.

Typical Applications:

  • Local I/O racks in gas/steam turbine control rooms
  • Compact control panels with short Cat5e/Cat6 cable runs
  • Safety systems (Mark VIeS) requiring copper-only IONet segments

 

Hardware Architecture & Under-the-Hood Logic

Unmanaged Layer 2 switch with hardware-based forwarding (no CPU/firmware). Full isolation between ports. Designed for real-time control traffic.

  1. Frames ingested from 16 copper ports.
  2. Hardware MAC address lookup forwards packets with <1 ms latency.
  3. 802.3x flow control prevents buffer overflow.
  4. Auto-negotiates speed/duplex; auto-crossover (HP-MDIX).
  5. LEDs clearly indicate link speed, activity, and power status.

 

Field Service Pitfalls: What Rookies Get Wrong

Overheating in Enclosed CabinetsRookies mount switches in sealed cabinets with no ventilation. Convection cooling fails → overheating → link drops.

  • Field Rule: Ensure 50 mm clearance above/below for airflow.

Unused Port StormsLeaving unused RJ45 ports active creates broadcast storms that spike IONet latency.

  • Quick Fix: Disable unused ports via ToolboxST or DIP switches; enable storm filtering.

Redundant Power MiswiringConnecting both power inputs to the same supply eliminates redundancy.

  • Field Rule: Feed TB1 and TB2 from separate 24 VDC sources for true redundancy.
IS420ESWBH3A

IS420ESWBH3A

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.