1. Product Overview

2. Technical Specifications

• Model Number: 405A662G02

• Manufacturer: Westinghouse / Emerson

• Compatible Systems: Ovation™ DCS, WDPF DCS

• Module Type: Plug‑in DC power supply (upgrade of 405A662G01)

• Input Voltage: 100–240 VAC, 50/60 Hz (auto‑sensing)

• Input Current: 5.5 A (max, reduced from G01)

• Output Voltage: 24 VDC (main)

• Output Current: 10 A (continuous, same as G01)

• Efficiency: Up to 92% (improved from G01’s 89%)

• Hot‑Swap: Yes (online replacement)

• Redundancy: 1+1 (diode‑OR’d)

• Isolation: Input‑output isolated

• Dimensions (H × W × D): 13.3 cm × 44.5 cm × 22.9 cm

• Weight: ~1.5 kg (slightly lighter than G01)

• Operating Temperature: 0 °C to 55 °C (extended upper limit)

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

• Protection: Overvoltage, overcurrent, short‑circuit, overtemperature, fan fail (enhanced sensing)

• MTBF: > 500,000 hours (improved from G01)

3. Key Features

• Higher Efficiency (92%): Reduces heat generation and energy consumption vs. G01.

• Extended Temperature Range: Operates reliably up to 55 °C for harsher environments.

• Lower Input Current: 5.5 A max reduces upstream load.

• Hot‑Swap & Redundancy: Replace online; 1+1 redundancy eliminates single points of failure.

• Enhanced Protection: Improved fault sensing for faster overcurrent/overvoltage response.

• LED Status Indicators: Power OK, Fault, Fan status (same as G01).

• Conformal Coating: Withstands dust, moisture, and corrosive environments.

• Drop‑In Compatible: Direct replacement for 405A662G01; no wiring or chassis changes needed.

4. Applications

• Power Generation: Thermal, nuclear, combined‑cycle plants (Ovation/WDPF core power).

• Process Industries: Petrochemical, pulp & paper, cement, water treatment.

• Critical Chassis: Ovation controller chassis, high‑density I/O chassis.

• Legacy System Upgrades: Preferred replacement for aging 405A662G01 units.

5. Installation & Operation

1. Unpacking: Inspect for damage; verify model and accessories.

2. Rack Insertion: Align with dedicated power slot; insert firmly.

3. Securement: Tighten front‑panel screws.

4. AC Input: Connect 100–240 VAC to module terminals.

5. DC Output: Connect 24 VDC to chassis backplane.

6. Power‑On: Confirm POWER OK (green) LED is steady.

7. Redundancy: Install second unit in adjacent slot for 1+1 redundancy.

8. Hot‑Swap: Replace faulty module online if FAULT (red) LED illuminates.

6. LED Status

• Green (POWER OK): Normal operation; output within limits.

• Red (FAULT): Overvoltage, overcurrent, short circuit, overtemperature, or fan failure.

• Yellow (FAN): On = fan normal; Blinking = fan fault.

7. Maintenance & Troubleshooting

Routine Maintenance (Quarterly)

• Check LED status.

• Inspect connectors for tightness/corrosion.

• Clean vents with dry, low‑pressure air.

• Verify fan operation (listen for airflow; check yellow LED).

Safety Precautions

• Disconnect AC power before removal.

• Allow capacitors to discharge (≥ 5 minutes) before handling.

• No user‑serviceable parts inside; do not open housing.

Fault Diagnosis

• Red FAULT LED ON: Check for overload/short circuit; clear blocked vents; verify fan.

• No LEDs: Check AC input and chassis power distribution.

• Yellow FAN LED Blinking: Fan failure; replace module.

8. Compatibility & Status

• Compatibility: Fully compatible with Ovation/WDPF chassis; backward‑compatible with 405A662G01 (direct swap).

• Status: Obsolete legacy part; available as NOS (new old stock) or factory‑refurbished (preferred over G01 for new spares).

• Certifications: CE, UL, CSA.

9. Warranty & Support

• Warranty: 12 months (refurbished); 24 months (new NOS).

• Support: Emerson technical support for installation and troubleshooting.