IS2020LVPSG3A - 28V Low Voltage Power Supply Module w/o 335V

SPECIFICATIONS:

Part Number: IS2020LVPSG3A
Manufacturer: General Electric
Series: Mark VIe
Function: 28V Low Voltage Power Supply Module w/o 335V
Input voltage: 230V AC
Output voltage: 2.5-7.5V, current up to 4A
Output voltage noise: < 5 mV RMS
Dimension: 261mm x 295mm x 50.8mm
Weight: 2.95 kg
Repair: 3-5 Days
Availability: In Stock
Country of Manufacture: United States (USA)
Manual: GEH-6421M

FUNCTIONAL DESCRIPTION:

IS2020LVPSG3A is a 28V Low Voltage Power Supply Module w/o 335V manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The 28V Low Voltage Power Supply Module is designed to deliver a stable and regulated 28V DC output for use in Distributed Control System (DCS) environments. It supports the reliable operation of control processors, I/O modules, communication interfaces, and other critical low-voltage components within the DCS architecture. This module is configured without a 335V input stage, making it suitable for systems where high-voltage input is either not utilized or provided through an external conversion stage. The design incorporates essential protection features, including overvoltage, short-circuit, and thermal protection, ensuring system safety and minimizing the risk of control disruptions. Its low output ripple and high efficiency contribute to maintaining signal integrity and operational stability in sensitive DCS electronics.

INSTALLATION:

The module is typically mounted within the DCS cabinet on a DIN rail or control backplane, ensuring proximity to the components it supplies. Input terminals are connected to a designated low-voltage DC or AC source, while output terminals are routed to downstream DCS subsystems such as I/O cards and controller interfaces. Proper grounding of the module chassis is critical to avoid electrical noise and to maintain system reliability. All electrical connections must be secured according to the system's wiring standards and verified for correctness before commissioning.

OPERATIONS:

It supports continuous operation, delivering consistent voltage levels required for control logic, signal processing, and data communication. In systems with redundancy requirements, multiple power supply modules may be configured for parallel operation or used in load-sharing arrangements to enhance system availability. Operational status may be monitored through onboard indicators or diagnostic feedback to the DCS. During shutdown, the module ceases output upon input power removal, with built-in protections ensuring a controlled and safe power-off sequence.

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FREQUENTLY ASKED QUESTIONS:

What is the primary use of this 28V power supply module in a DCS?

This module provides a regulated 28V DC output to power control processors, I/O modules, and communication interfaces within a Distributed Control System (DCS). It ensures the stable operation of critical low-voltage components.

Why is the 335V input excluded from this model?

This version is intended for applications where high-voltage input (335V) is not required or is supplied through a separate power conversion stage. This simplifies integration in systems with dedicated low-voltage input sources.

How is the output voltage regulated?

The module uses internal voltage regulation circuitry to maintain a consistent 28V DC output under varying load conditions, ensuring stable performance across all connected devices.