DS3820PSSB - Power Supply Module

SPECIFICATIONS:

Part Number: DS3820PSSB
Manufacturer: General Electric
Series: Mark IV
Product Type: Power Supply Module
Input Voltage: 110�125 V DC
Power Consumption: 150�250 W
Output Voltage: +5 V DC
Output Voltage: +15 V DC
Isolation: 1500 V RMS
Power Requirements: +5 V dc, 8 A
Number of relay channels: 16
Power supply voltage: 24 V dc
Operating Temperature: 0�C to +60�C
Size: 15.9 cm high x 17.8 cm
Weight: 0.9kg
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS3820PSSB is a Power Supply Module manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Gas Turbine Control Systems. The Power Supply Module is a critical component that provides stable and regulated DC power to the control system�s processor, I/O, and communication boards. It converts incoming AC or DC input into multiple precise output voltages, such as +5 V for logic circuits and �15 V for analog and I/O circuits, while filtering out noise and protecting against surges, transients, and input fluctuations. The module incorporates feedback regulation to maintain voltage stability under varying load conditions and includes protection circuits for overvoltage, overcurrent, short-circuit, and thermal faults. Its design ensures reliable operation in industrial environments, supports redundancy configurations for uninterrupted performance, and delivers clean, isolated power to downstream boards through the system backplane.

OPERATION:

The Power Supply Module receives its DC input, typically 110�125 V, and performs an internal self-check before supplying regulated output voltages to the system. Internal feedback loops continuously monitor and adjust the outputs to maintain stable voltages for connected processors, I/O, and relay boards, compensating for any variations in load. Status indicators, such as LEDs or backplane signals, provide real-time information on the module�s condition. Additionally, built-in protection circuits respond to overcurrent, overvoltage, short-circuit, or overtemperature events by limiting or shutting down the outputs. In systems configured with redundancy, a secondary power supply automatically maintains uninterrupted operation if the primary module fails, ensuring reliable performance for critical control applications.

CONFIGURATION:

The Power Supply Module is designed as a compact plug-in unit for the control system backplane or rack, typically occupying one or two slots and interfacing via edge connectors that carry both power and status signals. In critical industrial systems, two identical modules are often installed in parallel to provide redundancy, allowing the system to automatically switch to the secondary supply in case of a primary failure, ensuring uninterrupted operation. The module distributes multiple regulated voltage rails, such as +5 V for logic circuits and �15 V for analog/I/O circuits, through the backplane to downstream processor, I/O, and relay boards, while maintaining isolation between rails to prevent interference and ensure reliable performance.

MAINTENANCE & INTEGRATION:

Routine maintenance of the Power Supply Module involves visually inspecting the status indicators, verifying output voltages at test points, and checking connectors, fuses, and cooling passages to prevent long-term degradation. If a module fault is detected, it can be replaced by removing it from the backplane, with care taken to follow hot-swap procedures if supported. For integration, the module is designed to interface seamlessly with the Mark IV / Speedtronic control rack architecture, using keyed and polarized connectors to prevent incorrect installation. Its outputs supply multiple voltage rails to the processor, I/O, and relay boards while maintaining isolation between circuits. The module�s thermal design ensures reliable operation in industrial environments with ambient temperatures up to 60 �C.

WOC offers the largest stock of replacement parts for GE Speedtronic Gas Turbine Control Systems, including unused, rebuilt, and refurbished modules, all backed by warranty. We also provide expert repair services for faulty boards, helping extend equipment life and minimize downtime. Our team of experienced engineers is available 24/7 to support your OEM and automation needs, providing technical guidance, pricing, and availability information. Contact WOC by phone or email for fast, reliable solutions that keep your turbine control systems running at peak performance.

FREQUENTLY ASKED QUESTIONS:

What is the primary function of a Power Supply Module?

The Power Supply Module converts raw AC or DC input into multiple regulated DC outputs required by control system components, including processors, I/O, and relay boards. It ensures voltage stability, low ripple, and isolation between output rails to prevent interference.

What output voltages are provided?

The module generally provides +5 V DC for logic circuits and �15 V DC for analog and I/O circuits, with tight regulation to maintain performance under varying loads. Ripple and noise are minimized to below 50 mV peak-to-peak to protect sensitive analog and digital circuitry. Additional auxiliary outputs may be present depending on the system configuration.

How does the module respond to input voltage transients?

The module includes transient suppression and filtering circuits to protect against spikes, surges, and sags. The regulation loops compensate minor variations, while larger disturbances trigger fault detection to protect the output rails and downstream boards.