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The GE IS420ESWBH3A, also cataloged as the IS420ESWB Ethernet IONet Switch, operates as a dedicated hardware component for real-time industrial network traffic routing and deterministic packet distribution within GE Mark VIe and Mark VIeS safety control system platforms. Equipped with 8 10/100BASE-TX copper ports and an unmanaged architecture, the unit handles high-speed communication between controllers, I/O packs, and system drop nodes.

Hardware Specifications

Parameter Specification
Model IS420ESWBH3A (IS420ESWB)
Brand GE (GE Fanuc)
Origin USA
Weight 2 lbs (0.91 kg)
Dimensions 138 x 86 x 56 mm
Operating Temp -30 to 65 deg C
Power Consumption 18 to 32 VDC input supply
System Platform GE Mark VIe / Mark VIeS Series
Operating System QNX Neutrino
Onboard Memory 256 MB DDR SDRAM
Software Compatibility ControlST V04.03.18C
Network Interface 8 Ports 10/100BASE-TX, 100 Mbps FX Uplink
Protocol Standards IEEE 802.3, IEEE 802.3u, IEEE 802.3x
MAC Address Table 4K entries with minimum 256 KB buffer
Relative Humidity 5% to 95% (non-condensing)

Deterministic Network Backplane Bus Velocity and Firmware Flash Compatibility

The IS420ESWBH3A utilizes high-speed packet switching and HP-MDIX auto-sensing across all ports to maintain deterministic backplane bus communication velocity across redundant IONet networks. Powered by the QNX Neutrino operating system and 256 MB DDR SDRAM, the switch supports dynamic network topologies without introducing packet delivery jitter. Integrated redundant dual power supply inputs ensure continuous network backplane operation, while strict firmware flash compatibility maintained through GE ControlST software enables seamless network diagnostics and node expansion without interrupting live control loops.

Frequently Asked Questions

Q: What power input redundancy features are integrated into the IS420ESWBH3A switch?

A: The module includes dual redundant power supply terminal connections operating within an 18 to 32 VDC range to maintain continuous network operation if one supply fails.

Q: Is the IS420ESWBH3A compliant with GE Mark VIeS safety system requirements?

A: Yes, the ESWB series switches are explicitly built and certified to meet the real-time deterministic Ethernet requirements of both Mark VIe standard and Mark VIeS safety control systems.

Q: How does the switch indicate individual port status and operating speeds?

A: Each network port features dual-color LEDs providing visual status for link presence, port activity, full/half duplex mode, and 10/100 Mbps transmission speed.

Field Installation Guidelines

  1. Disconnect main 24 VDC power feeds before mounting or wiring the IS420ESWBH3A assembly.
  2. Snap the module securely onto a standard 35 mm DIN rail inside the enclosure, ensuring the metallic ground clip firmly contacts the grounded rail.
  3. Wear an ESD grounding wrist strap throughout installation to protect internal memory components.
  4. Wire primary and secondary power lines to the dual DC input terminals using recommended wire gauges to establish power supply redundancy.
  5. Connect shielded RJ-45 Ethernet cables to the designated IONet ports and ensure all cable shields terminate to cabinet frame ground.

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