1. Product Overview

2. Technical Specifications

• Model Number: 405A616H02

• Manufacturer: Westinghouse / Emerson

• Compatible Systems: Ovation™ DCS, WDPF DCS

• Module Type: Rack‑mounted, plug‑in DC power supply

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

• Input Current: 8 A (max)

• Output Voltage: 24 VDC (main), 24 VDC (auxiliary)

• Output Current: 12 A (main), 8 A (auxiliary)

• Hot‑Swap Capability: Yes (online replacement)

• Redundancy: 1+1 redundant operation (diode‑or’d)

• Isolation: Input‑output, channel‑to‑channel isolation

• Dimensions (H × W × D): ~13.3 cm × 44.5 cm × 25.4 cm

• Weight: ~1.8 kg

• Operating Temperature: 0 °C to 50 °C

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

• Protection: Overvoltage, overcurrent, short‑circuit, overtemperature, fan failure

• Environmental: Conformal coating, EMI filtering, LED status indicators

• MTBF: > 500,000 hours (typical)

3. Key Differences from 405A616H01

• Efficiency: Higher efficiency (up to 92% vs. 88% in H01), reducing heat and energy consumption.

• Thermal Management: Improved heatsink and fan design for better cooling and longer service life.

• Component Upgrades: Higher‑grade capacitors and semiconductors for enhanced reliability.

• Backward Compatibility: Pin‑to‑pin compatible with H01; direct replacement without chassis modifications.

4. Features

• Global AC Input: 100–240 VAC for worldwide deployment.

• Dual 24 VDC Outputs: Main (12 A) for controllers; auxiliary (8 A) for I/O modules.

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

• High Efficiency: Reduces heat generation and extends lifespan.

• Comprehensive Protection: Guards against overload, short circuit, overvoltage, and overtemperature.

• LED Status Indicators: Clear visual feedback for power OK, fault, and fan status.

• Conformal Coating: Protects against dust, moisture, and corrosive environments.

5. Applications

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

• Process Industries: Petrochemical, pulp & paper, cement, water treatment (high‑availability systems).

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

• Legacy Upgrades: Direct replacement for 405A616H01 in existing Ovation/WDPF installations.

6. 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 main/auxiliary 24 VDC to chassis.

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

7. Redundancy: Install second H02 in adjacent slot for 1+1 redundancy.

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

7. LED Status

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

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

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

8. 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.

9. Compatibility & Status

• Compatibility: Fully compatible with Ovation/WDPF chassis; backward‑compatible with H01.

• Status: Obsolete legacy part; available as NOS or factory‑refurbished.

• Certifications: CE, UL, CSA.