Technical Specifications

• Model: 405A528G33

• Manufacturer: Westinghouse / Emerson

• Compatible Systems: Legacy WDPF, Ovation DCS

• Configuration: 12‑slot chassis with 2MBB2 Multibus backplane (7381A61G01) and 1FILM2 EMI/line filter (7381A26G01)

• Input Power: 115/230 VAC auto‑sensing, 50/60 Hz

• Cooling: Dual hot‑swappable fans, front‑to‑back airflow

• Mounting: Standard 19‑inch EIA rack mount

• Dimensions (H×W×D): ~13.3 cm × 44.5 cm × 50.8 cm

• Weight: ~16.3 kg (empty, with backplane/filter)

• Operating Temperature: 0 °C to 50 °C

• Relative Humidity: 5% to 95%, non‑condensing

• Key Features: Integrated 2MBB2 backplane + 1FILM2 filter; hot‑swappable modules; redundant power supply support; enhanced EMI shielding; optimized for legacy WDPF/Ovation reliability

Series Model Comparison

• 405A528G01: 12 slots, 115/230 VAC, standard backplane, basic version

• 405A528G02: 12 slots, fixed 230 VAC, standard backplane, basic version

• 405A528G21: 12 slots, 115/230 VAC, enhanced backplane, high‑reliability version

• 405A528G33: 12 slots, 115/230 VAC, 2MBB2 backplane + 1FILM2 filter, high‑reliability MOD chassis

Application Fields

• Power Generation: Thermal/nuclear power plants, WDPF/Ovation DCS main chassis for DPUs, I/O, and redundant power

• Process Industries: Petrochemical, pulp & paper, cement—rack‑mounted DCS control nodes

• Legacy System Upgrades: Replacement/enhancement for aging WDPF/Ovation chassis requiring integrated backplane/filter

Installation & Operation

1. Mount to standard 19‑inch EIA rack; reserve 1U top/bottom for ventilation

2. Connect 115/230 VAC to chassis inlet; verify power LED

3. Install DPUs, I/O, power supplies per system slot layout

4. Complete Multibus wiring and chassis grounding for multi‑chassis coordination

5. Check fan LEDs quarterly; keep front/back vents unobstructed

Diagnosis & Maintenance

• Green Power LED: Normal AC input

• Green Fan LED: Dual fans operational

• Red Fault LED: Overheat, fan failure, backplane voltage fault, or filter anomaly

• Quarterly: Inspect connectors, backplane, filter, and air filters

• Safety: Disconnect all power before maintenance; wait for capacitor discharge

Product Status