Description
The Emerson 1X00781H01L is a DIN-rail mounted 24V DC power supply module purpose-built for the Emerson Ovation Distributed Control System (DCS) platform. This 240W power module delivers 10A of regulated 24V DC output, serving as the reliable energy backbone for Ovation controllers, I/O racks, communication interfaces, and field devices.
Engineered for continuous operation in demanding industrial environments, the Emerson 1X00781H01L features a universal input range supporting both AC and DC power sources, eliminating the need for site-specific transformers. With a fanless natural cooling design and MTBF exceeding 100,000 hours, this UL-certified module (File E347058) provides the foundation for high-availability process automation.
Application Scenarios
In a 500MW coal-fired power plant, the Emerson Ovation DCS monitors and controls boiler combustion, turbine speed, and generator excitation across thousands of I/O points. When a legacy power supply began exhibiting voltage fluctuations that threatened control system stability, the plant maintenance team replaced it with the Emerson 1X00781H01L. The new module restored stable 24V DC power to the controller cabinets within minutes, eliminating intermittent communication errors and ensuring uninterrupted generation dispatch. The Emerson 1X00781H01L enables the plant to maintain continuous operations while meeting strict grid code requirements for frequency and voltage regulation.
The Emerson 1X00781H01L addresses critical pain points in process automation, including unreliable power delivery in harsh electrical environments, limited input voltage compatibility across global sites, and cooling fan failure risks. By providing galvanically-isolated, low-ripple (<50mV pp) output, the module ensures sensitive control electronics receive clean power free from electromagnetic interference. For facilities deploying N+1 redundant power configurations, the Emerson 1X00781H01L supports seamless parallel operation and hot-swappable replacement, eliminating single points of failure that could trigger costly unplanned shutdowns.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1X00781H01L |
| Manufacturer | Emerson Automation Solutions (formerly Emerson Process Management) |
| Product Category | DIN-Rail Power Supply Module |
| Input Voltage | 85–264 VAC (43–67 Hz) or 90–375 VDC |
| Output Voltage | 24 VDC (regulated, isolated) |
| Output Current | 10 A (rated) |
| Output Power | 240 W |
| Conversion Efficiency | ≥87% – 90% (typical) |
| Output Ripple | <50 mV peak-to-peak |
| Protection Features | Overcurrent, short-circuit, overvoltage, overtemperature |
| Cooling Method | Fanless natural convection (no moving parts) |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5% – 95% (non-condensing) |
| Mounting | Standard 35mm DIN-rail (snap-on) |
| Protection Class | IP20 (cabinet installation) |
| Certifications | UL (E347058), CE, RoHS, IEC 61000 industrial standards |
| MTBF | ≥100,000 hours |
