Technical Specifications

• Model: 405A528G01

• Manufacturer: Westinghouse (Emerson)

• System Compatibility: WDPF DCS, Ovation™ DCS (legacy)

• Type: 12‑slot MultiBus chassis (backplane + enclosure)

• Backplane: IEEE 796 Multibus (P1 bus), 12 slots

• Slots: 12 module positions (supports CPU, I/O, power supply modules)

• Input Power: 115/230 VAC, 50/60 Hz (via integrated power supply)

• Cooling: Dual integrated cooling fans, front‑to‑back airflow

• Mounting: 19” standard rack‑mount (EIA compliant)

• Dimensions (H×W×D): ~13.3 × 44.5 × 50.8 cm (5.25” × 17.5” × 20”)

• Weight: ~15.9 kg (35 lb) (empty)

• Key Features: Hot‑swappable module support, redundant power supply compatibility, EMI shielding, built‑in line filter

• Variants:

  • 405A528G01: 12‑slot, 115/230 VAC

  • 405A528G02: 12‑slot, 230 VAC

  • 405A528G61/G62: 12‑slot, 115/230 VAC (high‑temp)

Application Fields

• Power Generation: WDPF/Ovation DCS control room chassis for power plant DPU controllers, I/O modules, and redundant power supplies.

• Process Industries: Petrochemical, pulp & paper, cement — 19” rack‑mounted DCS chassis for distributed control nodes.

• Legacy System Upgrades: Replacement chassis for aging WDPF installations, fully interoperable with original modules.

Installation & Wiring

1. Rack Mounting: Secure chassis to 19” EIA rack using front panel mounting brackets; ensure adequate rear clearance for airflow.

2. Power Connection: Connect 115/230 VAC to chassis power inlet; verify voltage setting matches supply.

3. Module Insertion: Insert DPU, I/O, and power supply modules into slots (follow slot assignment rules: CPU in slot 0, power supplies in dedicated slots).

4. Backplane Cabling: Connect Multibus P1 connectors between chassis (if multi‑chassis system); ensure proper grounding.

5. Cooling Check: Verify fans operate; keep front/rear vents unobstructed for airflow.

Operation & Diagnostics

• PWR (Green): Chassis input power normal.

• FAN (Green): Cooling fans operational.

• FAULT (Red): Overheating, fan failure, or backplane voltage fault.

• Module Status: Individual module LEDs indicate power, communication, and fault status.

Maintenance & Safety

• Maintenance: Clean air filters quarterly; inspect backplane connectors for corrosion; verify fan operation monthly.

• Safety: Disconnect AC power before servicing; allow 5 minutes for capacitors to discharge.

• Operating Limits: Ambient temperature 0–50 °C; avoid blocking ventilation slots.

Product Status

• Current Status: Obsolete (legacy WDPF platform); new old stock (NOS) and refurbished units available.

• Compatibility: Fully compatible with all WDPF/Ovation modules (e.g., 405A431G01/G02 power supplies, 1C311xx I/O modules).