IS2020RKPSG1AK - Rack Power Supply Module

SPECIFICATIONS

Part No.: IS2020RKPSG1AK
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Temperature: 0 to 60 °C
Product Type: Rack Power Supply Module
Availability: In Stock
Series: Mark VI

Functional Description

IS2020RKPSG1AK is a Rack Power Supply Module developed by GE. It is a part of Mark VI control system. The Mark VI VME rack power supply is a crucial component designed to seamlessly integrate with the VME control and interface racks. Strategically mounted on the side of these racks, its primary function is to provide essential power requirements for the system's optimal functioning.

Features

• This power supply unit offers a diverse range of voltage outputs to cater to various components connected to the VME backplane. Specifically, it delivers +5 V, ±12 V, ±15 V, and ±28 V direct current (dc) to the VME backplane, ensuring that the associated devices receive the appropriate power levels for their operation. Additionally, the Mark VI VME rack power supply extends its functionality by offering an optional 335 V dc output, specifically designed for powering flame detectors connected to the TRPG (Thermal Radiation Panel Group).
• The power supply unit provides flexibility in terms of supply input voltage, offering two distinct selections to accommodate different operational requirements. The first option is a 125 V dc input supply, which draws power from a dedicated Power Distribution Module (PDM). This configuration allows for a reliable and centralized power source, contributing to the overall efficiency and stability of the system. The second option is a low voltage version tailored for 24 V dc operation, providing an alternative power input for situations where lower voltage is preferred or required.
• It stands as a critical element in the infrastructure of VME control and interface racks, ensuring a consistent and reliable power distribution to the VME backplane and associated components. Its multiple voltage outputs and input options make it a versatile solution that can be adapted to various operational scenarios, enhancing the overall performance and functionality of the integrated system.

Installation

• Mounting Location: The power supply is securely mounted on the right-hand side of the VME rack using a sturdy sheet metal bracket. This location is chosen for accessibility and ease of connection to other components within the system.
• Connection Points: At the bottom of the power supply, various crucial connection points are located. These include the dc input, the +28 V dc output, and the optional 335 V dc output. Additionally, in newer designs, a status connector is present at the bottom, providing a convenient way to monitor the power supply's operational status.
• Top Connectors: Positioned at the top of the assembly are two connectors, namely PSA and PSB. These connectors interface with a cable harness responsible for carrying power to different sections of the VME rack. Each of these connectors corresponds to specific sections labeled A, B, C, D, E, and F, ensuring a well-organized and efficient power distribution throughout the system.
• 28 V DC Power Modules:The power supply comprises five 28 V dc power modules, each dedicated to supplying power to a specific section of the VME rack. These modules, distributed across sections A to F, contribute to a modular and scalable power distribution design.
• External Peripheral Device Power:For additional versatility, the P28C output or PS28 at the bottom of the power supply can be utilized to power an external peripheral device. To enable this feature, a jumper plug located on the bracket to the left of the rack must be repositioned from the Normal position to the Isolated position below.
• Fan Usage:The fan integrated into the system is activated only when the controller is mounted within the rack. Its power source is derived from the top connector on the same bracket, situated on the left side of the rack. This design ensures efficient cooling and ventilation when the controller is operational within the rack.

Fault Conditions

• Transient Shutdown Faults:The first class of faults encompasses those issues that result in a temporary shutdown of one or more output channels. These faults are often characterized by a brief interruption in the power supply to specific components connected to the VME backplane. Transient shutdown faults are typically triggered by momentary fluctuations in the input voltage, environmental conditions, or other external factors. While these faults cause a temporary disruption, they are designed to self-correct, and normal operation resumes once the transient condition is resolved.
• Resettable Faults:The second class of faults involves issues that necessitate a reset action to clear the fault and restore normal functionality. These faults may be more persistent than transient shutdown faults and could be triggered by various factors such as overcurrent, overvoltage, or temperature thresholds being exceeded. To address these faults, a reset procedure must be initiated, which could involve manual intervention or an automated process within the power supply system. Clearing the fault typically requires identifying and rectifying the underlying cause before normal operation can resume.
• Permanent Failures:The third class of faults represents permanent failures that cannot be resolved through simple reset actions. These faults result in a complete and irreversible breakdown of the power supply unit, rendering it inoperable. In such cases, the only viable solution is to replace the faulty power supply with a new, functional unit. Permanent failures could be attributed to severe internal component damage, extensive wear and tear, or other catastrophic events that compromise the overall integrity of the power supply system. Replacement ensures the continuity of power distribution and prevents prolonged system downtime.

Configuration

• Locate the Power Supply Bracket: Identify the sheet metal bracket located to the left of the VME rack, where the power supply is mounted. This bracket contains the jumper plug that needs adjustment for configuring the P28C output.
• Identify the Jumper Plug: On the bracket, locate the jumper plug. This plug is a small connector with two or more pins that can be inserted into different positions.
• Understand Normal and Isolated Positions: The jumper plug typically has two positions: Normal and Isolated. In the Normal position, the power supply functions as usual, delivering power to the VME backplane. In contrast, the Isolated position redirects power to the P28C output or PS28, allowing it to be used for an external peripheral device.
• Power Down the System: Before making any adjustments, ensure that the entire system is powered down to prevent any electrical hazards or disruptions.
• Move Jumper Plug to Isolated Position: Carefully move the jumper plug from its original position (Normal) to the Isolated position. This adjustment redirects the power flow to the P28C output, facilitating the connection of an external peripheral device.
• Power Up the System: Once the jumper plug is in the Isolated position, power up the system. This configuration change enables the P28C output to supply power for the external peripheral device.
• Connect the External Peripheral Device: With the power supply now configured, connect the external peripheral device to the designated P28C output or PS28 at the bottom of the power supply.
• Verify Operation: Conduct thorough testing to ensure that the external peripheral device is receiving the appropriate power supply from the P28C output. Monitor the system for any signs of irregularities or issues.

The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS2020RKPSG1AK?
It is a rack power supply module developed by GE under the Mark VI series.

Can I repair individual components if an issue is found in the power supply?
No, the power supply has no field-serviceable components. If defective, the entire power supply unit must be replaced.

Should I remove the power supply cover in the field?
No, the power supply cover should not be removed in the field. Any service or replacement should be conducted by qualified personnel.

How do I identify problems with the power supply?
Look for two indications- No LEDs ON indicates an input voltage problem or a defective supply. Red LED ON Could indicate various fault conditions or a defective supply.