Product Overview

The Emerson VE5128 serves as a core DC/DC system power supply module engineered specifically for DeltaV™ and Ovation™ Distributed Control Systems (DCS). This module accepts a wide range of DC inputs (12V or 24V) and converts them into the precise voltage rails—including +5 VDC, +3.3 VDC, and +12 VDC—required to energize controllers and I/O interfaces. Its modular architecture supports active load-sharing, ensuring that mission-critical control loops remain powered even during individual supply faults. We offer this module as 100% Brand New original equipment, featuring factory-standard conformal coating for deployment in the most demanding industrial environments.

Technical Specifications

Engineering Advantages

• Tri-Rail Output Management: The VE5128 eliminates the need for multiple discrete power units by providing three essential voltage rails from a single module. It powers high-speed logic (+3.3V/5V) and field-side I/O components (+12V) simultaneously, simplifying the overall power distribution architecture within the DCS cabinet.

• Redundant Load-Sharing Architecture: The modular design allows multiple VE5128 units to communicate and balance the current load across a shared backplane. This active redundancy prevents any single power module from overheating and ensures seamless failover if one unit loses input power.

• G3-Rated Environmental Resilience: Emerson applies a robust conformal coating to the VE5128 circuitry. This protective layer wards off corrosion from sulfurous gases, moisture, and conductive dust, meeting the strict environmental requirements for refineries, offshore platforms, and chemical processing facilities.

• Stable High-Efficiency Conversion: With an efficiency rating of ≥90%, the module converts input power with minimal heat generation. This high thermal efficiency preserves the lifespan of sensitive internal components and reduces the cooling load required for tightly packed control racks.

• Self-Diagnostic Fault Monitoring: Integrated circuitry continuously tracks the health of each output rail. The module reports fault conditions—such as under-voltage or thermal overload—directly to the DCS software and front-panel LEDs, enabling rapid troubleshooting before a process interruption occurs.

FAQs

• Can the VE5128 be used as a standalone power supply?

  The VE5128 is designed specifically for integration into DeltaV or Ovation power carriers. It relies on the system backplane for proper signal routing and load-sharing communication. Always install the module into a compatible Emerson carrier slot.

• Does the VE5128 support hot-swapping under load?

  Yes. In a redundant configuration, the VE5128 supports hot-swapping. You can remove and replace a faulty module without shutting down the controller or interrupting the I/O signals, provided the remaining module(s) can carry the total system load.

• How does the module handle 12V vs 24V inputs?

  The VE5128 features an auto-sensing wide input range. It automatically adjusts its internal conversion stages to provide stable output rails regardless of whether the bulk DC supply provides 12V or 24V, offering maximum flexibility for different plant battery or bulk supply standards.