Emerson VE5128 DeltaV Ovation System Power Supply

The Emerson VE5128, also cataloged as the VE5128 System Power Supply, operates as a dedicated hardware component for stable DC/DC power distribution within DeltaV and Ovation distributed control system platforms.

Hardware Specifications

Process Control & Power Interfacing

The VE5128 module processes raw DC input power to distribute precise voltages to active logic carriers and field interfaces.

• 4-20 mA HART Loop Protocol System Support: By providing steady 12 VDC auxiliary output, the module stabilizes the diagnostic communication channels necessary for uninterrupted HART field device transmissions.
• Galvanic Channel Isolation: Circuit pathways within the power supply prevent ground-loop cross-talk and block high-voltage transients on the bulk supply side from feeding through to the sensitive 3.3 VDC controller logic circuits.
• Active Diode Auctioning: Features integrated Schottky diode paths for seamless redundancy matching, facilitating dynamic load-sharing when paired in parallel configurations.

Frequently Asked Questions

Q: Can the VE5128 module be hot-swapped under active load?

A: Yes. In a redundant dual-power configuration, the VE5128 can be inserted or removed from the carrier backplane without disrupting primary system logic or causing voltage dips.

Q: What is the benefit of the conformal coating on this power supply?

A: The conformal layer shields internal SMD components from corrosive gases, moisture, and conductive dust, maintaining the insulation parameters required in severe industrial environments.

Field Installation Guidelines

• Power Wire Termination: Tighten bulk supply input terminals to a verified torque of 0.56 N-m (5 in-lb) to prevent high-resistance termination points.
• Chassis Grounding: Verify a solid low-impedance connection between the DIN rail carrier and the primary cabinet protective earth ground using a copper strap of at least 4.0 mm square (11 AWG).
• Thermals and Clearance: Ensure at least 80 mm of vertical clearance above and below the power module vents to facilitate unrestricted natural convection cooling.