Model Interpretation

IS420: GE Mark VIeS safety system series

ESWB: Ethernet Switch Board (IONet switch function)

H: Hardware revision

3A: Firmware/mechanical configuration variant

Technical Parameters

Ports & Performance

Ports: 16 × 10/100Base‑TX RJ45 (copper only, no fiber)

Standards: IEEE 802.3, 802.3u, 802.3x; auto‑negotiation

Buffer: 256 KB; 4K MAC address table

Forwarding: Wire‑speed; supports multicast/broadcast for IONet

Electrical

Input Voltage: 24/28 VDC (18–32 VDC)

Power Consumption: ~10 W typical

Mechanical & Environmental

Dimensions (H×W×D): 86 × 188 × 133 mm (3.4 × 7.4 × 5.2 in)

Weight: ~1.4 kg (3.1 lb)

Operating Temperature: −40°C to +70°C

Humidity: 5–95% non‑condensing

Protection: IP40; conformal coated; fanless convection cooling

Certifications: CE, UL, RoHS; Class I Div 2 hazardous area rated

Mounting & Indicators

Mounting: DIN‑rail (parallel/perpendicular) or panel‑mount

LEDs: Power, Run, Fault, and per‑port Link/Activity

Core Functions

IONet Network Hub: Connects Mark VIe controllers (e.g., IS420UCSB), I/O packs (IS220/IS230), and HMI nodes on the redundant IONet.

Real‑Time Data Switching: Prioritizes control and safety traffic; supports IONet’s deterministic, low‑latency communication.

Network Redundancy: Works with dual‑controller TMR/DMR architectures; enables seamless failover without data loss.

Industrial Hardening: Withstands shock, vibration, and EMI in turbine halls and SIS environments.

Plug‑and‑Play: Unmanaged design requires no configuration; hot‑swappable in Mark VIe racks.

Applications

Power Generation: Gas/steam turbine control (Mark VIe Speedtronic); combined‑cycle plants.

Safety Systems (SIS): Emergency Shutdown (ESD) and safety interlock networks in Mark VIeS.

Oil & Gas: Compressor stations, offshore platforms, and hazardous‑area controls.

Heavy Industry: Petrochemical, pulp & paper, and metallurgical plant critical controls.

Usage & Maintenance Instructions

Installation: Mount on DIN‑rail or panel; allow 50 mm clearance for airflow.

Wiring: Use Cat 5e/6 UTP cables; separate IONet from high‑voltage wiring.

Configuration: No IP setup needed (unmanaged); assign IONet addresses to connected devices.

Maintenance: Inspect LEDs monthly; clean vents annually; update firmware via Mark VIe ControlST.

Compatibility: Fully compatible with Mark VIe/VIeS; pairs with IS420UCSB, IS220PDOA, IS230TBOA, etc.