EMERSON 1X00781H01L Ovation DIN‑Rail Power Supply Module

Description

Hardware & Electrical Specifications

‑ Manufacturer: Emerson (Westinghouse legacy) ‑ Compatible System: Ovation DCS distributed control system ‑ Input: 85‑264 VAC wide‑range, active PFC > 0.95 ‑ Output: 24 VDC, 10 A continuous (240 W), peak 360 W ‑ Protection: OVP, fold‑back over‑current, hiccup‑mode short‑circuit, OTP thermal shutdown ‑ Isolation: Input‑to‑output 3000 VAC isolation ‑ Indicators: DC‑OK green LED for power‑good status ‑ Connectors: Removable screw terminal blocks for AC input and DC output ‑ Mounting: Standard 35 mm DIN‑rail snap‑on installation ‑ PCB Finish: Conformal coated for harsh plant environments (ISA‑S71.04 G3) ‑ Cooling: Fan‑less natural convection

Environmental Specifications

‑ Operating Temperature: ‑40 °C ~ +70 °C, power derating above 60 °C ‑ Storage Temperature: ‑40 °C ~ +85 °C ‑ Relative Humidity: 5%‑95 % non‑condensing ‑ Enclosure Rating: IP20 ‑ Vibration & Shock: Designed for power‑plant cabinet EMI and transient conditions

Mechanical Data

‑ Weight: approx 0.35 kg ‑ Form‑factor: Compact DIN‑rail housing

Core Functions

1. Ovation rack power feed: Supplies stable 24 VDC power to Ovation I/O drop racks, baseplates and I/O modules.
2. Field instrument power: Provides regulated 24 VDC for transmitters, solenoids and field auxiliary devices.
3. Built‑in fault protection: Automatic shutdown under over‑voltage, short‑circuit or over‑temperature events to protect downstream DCS hardware.
4. Redundancy capability: Can be paralleled for redundant power architecture for critical DCS cabinets.
5. Health status indication: Front‑panel DC‑OK LED gives visual operational diagnostic.

Installation, Replacement & Critical Warnings

1. Isolate AC input power before module removal or replacement. Unit is DIN‑rail hot‑swap capable under proper redundant design conditions.
2. Verify input AC voltage matches site supply; improper input voltage causes module failure.
3. Torque screw terminals properly; loose terminals lead to overheating and intermittent power dropout.
4. After installation, confirm DC‑OK LED illuminates and measure 24 VDC output voltage before connecting DCS load.

5. Common failure mode: AC‑line surges, aging internal electrolytic capacitors. Check cabinet temperature when random DCS I/O resets occur.