Key Specifications

• Model: 405A675G21

• Manufacturer: Emerson / Westinghouse

• Compatible Systems: Ovation DCS, WDPF DCS

• Type: Rack‑mounted AC‑DC power supply

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

• Output Voltage: 24 VDC (fixed)

• Output Current: 10 A continuous

• Efficiency: Up to 89%

• Mounting: Standard 19” rack, dedicated Ovation slot

• Hot‑Swap: Yes (online replacement)

• Redundancy: 1+1 redundant parallel operation

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

• Weight: ~1.42 kg

• Environment: Conformal coating for dust/moisture resistance

• Origin: United States

Main Features

• Universal AC input: Works with global industrial grids.

• Hot‑swap design: Replace without shutting down the system.

• 1+1 redundancy: Eliminates single points of failure.

• Multi‑protection: Guards against electrical faults.

• LED indicators: Real‑time status (power, fault, fan).

• Conformal coating: Withstands harsh industrial environments.

Applications

• Power generation: Thermal, nuclear, combined‑cycle plants.

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

• Legacy DCS maintenance: Ovation/WDPF system upgrades & spares.

Comparison with Related Models

• 405A675G21: Rack‑mounted (plugs into dedicated Ovation chassis slots).

• 405A672H01: DIN‑rail mounted (independent enclosure for standard DIN rails).

• 405A662G01/G02: Ovation slot‑mounted (older 13 VDC output).

• All 405A series: 24 VDC / 10 A (except 405A662G01/G02).

Product Status & Warranty

• Status: Obsolete (EOL). Only new old stock (NOS) or refurbished units available.

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

• Compatibility: Fully compatible with all standard Ovation/WDPF DCS hardware.

LED Status

• Green (Power): On = normal output.

• Red (Fault): On = overvoltage/overcurrent/short/overtemp/fan fault.

• Yellow (Fan): On = fan operating normally.

Maintenance & Safety

• Routine check: Quarterly inspection of LEDs, connections, fans, and vents.

• Cleaning: Use dry, low‑pressure air to remove dust.

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