DS3820PSSC - Power Supply Assembly Module (80-140VDC)

SPECIFICATIONS:

Part Number: DS3820PSSC
Manufacturer: General Electric
Series: Mark IV
Product Type: Power Supply Assembly Module (80- 140VDC)
Form Factor: Rack-mountable plug-in module
Number of channels: 12
Input Voltage Range: 80�140 VDC
Nominal Input Voltage: 125 VDC
Output Voltages: +5 VDC
I/O Connections: Ribbon-style connectors
Operating temperature: -40 to +70�C
Size: 8.25 cm high x 4.18 cm
Repair: 3-7 days
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS3820PSSC is a Power Supply Assembly Module (80- 140VDC) manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Control Systems. The power supply module�s main function is to convert the incoming DC voltage into various regulated voltages required by the turbine control electronics. It supplies power to processor boards, I/O modules, communication interfaces, and relay drivers. This stable power is critical for running the logic circuits, real-time processing, sensor inputs, actuator outputs, and fault detection systems. In triple modular redundant (TMR) systems like the Mark VI, the module supports the R, S, and T cores, ensuring that each core receives independent, reliable power for continuous and synchronized operation.

This module converts the incoming 125VDC (nominal) from battery-backed plant sources into various regulated DC voltages needed by other circuit boards in the control cabinet. These include +5VDC, +15VDC, and 15VDC outputs that are vital for powering CPU logic, analog signal processing boards, and relay drivers. The power supply module ensures high reliability in harsh turbine environments by offering noise filtering and surge protection, minimizing the risk of logic faults due to electrical disturbances.

INSTALLATION:

The power supply receives its input from a 125VDC station battery system, ensuring the control system remains operational even during plant-wide AC outages. The module is connected through terminal blocks or plug-type connectors, with proper polarity and grounding being critical. Installers must verify correct voltage levels before powering the module, and grounding practices must comply with GE�s recommended configurations to avoid electrical noise and ensure signal integrity across the logic system. Cooling and ventilation within the cabinet should be maintained to avoid overheating, as the module may dissipate a significant amount of heat depending on the load. In many installations, two or more power supply modules are used in parallel to provide redundancy, increasing the fault tolerance of the control system.

WOC maintains the largest inventory of Replacement parts for GE Speedtronic Turbine Control Systems. Additionally, we offer warranty-backed unused and rebuilt boards as well as board repairs for your damaged ones. For your OEM needs, our team of professionals is available around the clock. We at WOC are happy to help you with any needs you may have in terms of automation. Please contact our team by phone or email for pricing and availability on any components and repairs.

FREQUENTLY ASKED QUESTIONS:

What is the typical power consumption of the module?

Power consumption depends on the load, but the module is designed to efficiently supply multiple control cards without overheating. It draws current from a 125VDC battery-backed system.

What happens during an input voltage drop below 80VDC?

The module may stop functioning or output unstable voltages, potentially leading to system errors or shutdowns.

What is the typical ripple voltage on the output lines?

The output ripple is tightly regulated and kept within �50mV for +5V and �100mV for �15V outputs to ensure noise-free operation of sensitive control circuits.