Technical Specifications

• Model: 405A431G01

• Manufacturer: Emerson (Westinghouse)

• System Compatibility: Ovation™ DCS (all mainstream versions)

• Function: Isolated DC–DC power supply, 24 VDC output

• Input Voltage: 85–264 VAC (universal), 50/60 Hz; 120–370 VDC

• Output Voltage: 24 VDC ±1% (adjustable 22–26 VDC)

• Output Current: 10 A continuous

• Power Rating: 240 W

• Efficiency: ≥ 92% (full load)

• Isolation: 2,500 VAC input‑to‑output

• Protection: Overvoltage, overcurrent, short‑circuit, overtemperature, surge/EMI filtering

• Operating Temperature: 0 °C to +60 °C

• Storage Temperature: −40 °C to +85 °C

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

• Installation: Standard 35 mm DIN rail mount

• Dimensions: ~125 × 90 × 55 mm

• Weight: ~1.1 kg

• Certifications: CE, UL, RoHS compliant

• Key Features: Hot‑swappable, redundant parallel operation, active current sharing, LED diagnostics

Application Fields

• Power Generation: Ovation DCS system power, controller/I/O backplane supply, redundant power for power plant control rooms.

• Process Industries: Petrochemical, pulp & paper, cement — 24 VDC distribution for field transmitters, valves, and remote I/O.

• Water Treatment: SCADA system power, sensor/actuator supply, redundant power for wastewater treatment plants.

• Critical Infrastructure: Any application requiring high‑reliability, isolated 24 VDC in industrial environments.

Installation & Wiring

1. Pre‑Installation: Disconnect all AC/DC power; ensure DIN rail is properly grounded.

2. Mounting: Snap module onto a standard 35 mm DIN rail and lock in place.

3. AC Input: Connect 85–264 VAC to L/N/PE terminals; use 14–18 AWG wire.

4. DC Output: Connect 24 VDC to +24V/COM terminals; observe polarity.

5. Redundancy: For parallel redundancy, connect +24V terminals together and COM terminals together; enable active current sharing.

6. Grounding: Connect chassis ground to system earth for ESD/EMI protection.

Operation & Diagnostics

• Power LED: PWR (green) = output voltage normal.

• Fault LED: FAULT (red) = overvoltage, overcurrent, short circuit, or overtemperature.

• Input LED: AC OK (green) = AC input present and within range.

• Monitoring: Monitor output voltage/current via Ovation workstation tools or local test points.

Maintenance & Safety

• Maintenance: Inspect connections and terminals periodically; keep ventilation slots clear.

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

• Operating Limits: Do not exceed rated input/output voltage/current; keep within temperature/humidity ranges.

Product Status

• Current Status: Active production; new original and refurbished spares available.

• Compatibility: Fully interoperable with all modern Ovation DCS releases.