Technical Specifications

• Model: 405A528G21

• Manufacturer: Westinghouse / Emerson

• Compatible Systems: Legacy WDPF, Ovation DCS

• Configuration: 12 slots with IEEE 796 P1 Multibus backplane

• 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: Approximately 15.9 kg (empty chassis)

• Operating Temperature: 0 °C ~ 50 °C

• Relative Humidity: 5% ~ 95%, non-condensing

• Main Features: Hot-swappable module support, redundant power supply compatibility, built-in EMI shielding and line filter, upgraded structure for improved reliability

Series Model Comparison

• 405A528G01: 12 slots, 115/230 VAC auto-sensing, standard version

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

• 405A528G21: 12 slots, 115/230 VAC auto-sensing, enhanced high-reliability version

Application Fields

• Power generation: Used as the main cabinet for WDPF and Ovation DCS in thermal and nuclear power plants to install DPU controllers, I/O modules and redundant power supplies.

• Process industries: Applied to petrochemical, pulp & paper, cement and other industries for rack-mounted DCS control nodes.

• Legacy system upgrade and replacement for existing WDPF and Ovation control systems.

Installation & Operation

1. Fix the chassis on a standard 19-inch EIA rack and reserve sufficient space for ventilation.

2. Connect 115/230 VAC power to the chassis power port.

3. Install controllers, I/O modules and power supplies into designated slots following system specifications.

4. Complete Multibus connection and reliable grounding for multi-chassis networking.

5. Regularly check fan operation and keep ventilation openings unobstructed.

Diagnosis & Maintenance

• Green Power LED: AC input is normal.

• Green Fan LED: Cooling fans operate properly.

• Red Fault LED: Indicates overheating, fan failure or abnormal backplane voltage.

• Inspect internal connectors and air filters quarterly. Disconnect all power before maintenance, and wait for capacitors to fully discharge.

Product Status