IS200JPDFG1AED - Power Distribution Board

SPECIFICATIONS

Part No.: IS200JPDFG1AED
Manufacturer: General Electric
Product Type: Power Distribution Board
Size: 12 in. x 8.4 in. x 6.3 in.
Mounting: Four mounting holes, 10 screws
Temperature Operating: -30 to 65oC
Availability: In Stock
Country of Manufacture: United States (USA)
Series: Mark VIe

Functional Description

IS200JPDFG1AED is a Power Distribution Board developed by GE. It is a part of Mark VIe control system. The board manages and distributes 125 V DC power within the control system. It is designed to accept redundant 125 V DC power inputs and ensure reliable power distribution to various system boards. One of the key features of the board is its operation with a floating DC bus, which is centered on earth rather than grounded. This design enables the detection of system ground faults while maintaining a non-hazardous live 125 V DC rating. The floating DC bus approach enhances system safety and reliability by ensuring early fault detection and isolation.

Functionality and Power Distribution

The module plays a critical role in supplying reliable and stable power to the control system. It receives 125 V DC battery power, which enters the module through a dedicated terminal board. Before the power reaches the JPDF circuitry, it passes through a 125 V DC, 30 A circuit breaker and a line filter, ensuring protection from overcurrent conditions and electrical noise. The conditioned power is then delivered to the IS200JPDF board via the J1 connector. Once inside the board, the JPDF module distributes power efficiently through multiple protected outputs. The design includes:

• Three fused, non-switched outputs, which provide continuous power to essential components.
• Six fused, switched outputs, which can be controlled as needed for various system functions.

In addition to handling DC battery power, the module also manages AC input power. AC power is routed through the JPDF to the DACA modules, where it is converted into DC power. This converted DC power is then returned to the JPDF, where it merges with the incoming battery feed. Because the system is designed to accept any combination of one or more active power sources, the JPDF ensures uninterrupted 125 V DC supply even if one input source becomes unavailable. This redundancy significantly enhances system reliability and operational continuity.

To support monitoring and diagnostics, the module integrates a robust feedback system connected to a PPDA I/O pack. This system provides continuous visibility into critical power conditions, including:

• Bus voltage magnitude, ensuring the DC bus remains within acceptable operating limits.
• Ground fault detection, identifying insulation failures or unwanted connections to ground.
• Detection of excessive AC voltage appearing on the DC bus, enabling swift corrective action.
• Status of each fused branch circuit, confirming whether each output is supplying power as expected.

Installation Guidelines

The module is base-mounted vertically on a metal base inside a cabinet used by the Power Distribution Module (PDM). Proper installation requires:

• Connecting the sheet metal to the system protective earth (PE).
• Applying input battery power to terminals DCHI and DCLO.
• If DACA modules are used, AC power should be applied to JAF1, typically from an IS2020JPDB module.
• Connecting DACA modules to JPDF through JZ2 and JZ3 connectors.
• Ensure that output circuits are connected as per the system documentation.
• For systems using a PPDA power diagnostic I/O pack, a 50-pin ribbon cable must connect the JPDF P1 connector to the P2 connector on the board holding the PPDA. This connection may pass through other core PDM boards using the P2 connector.

Grounding Considerations

• The Mark VIe system divides grounding into two categories:
  • Protective Earth (PE): Must be connected to a suitable earth connection per local regulations. Should support a minimum of 60 A for 60 seconds with no more than a 10 V drop.
  • Functional Earth (FE): Must be bonded to the PE ground at a single point.
• The module is grounded through metal mounting supports, which are attached to the underlying sheet metal of the metal module. Grounding is further reinforced via metal switch bodies on JPDF, ensuring a stable local reference point for feedback signals appearing on P2.
• The module's sheet metal is insulated from the mounting surface, allowing an independent definition of JPDF ground. Typically, the JPDF board is mounted to a back base that is grounded to FE. It is positioned low within the cabinet, with a separate ground wire connecting the JPDF module to PE. The ground wire length should be minimized to maintain a low impedance at radio frequencies, allowing the input line filters to function effectively.

World of Controls has the most comprehensive collection of GE Mark VIe components. Please contact WOC as soon as possible if you require any extra information.

Frequently Asked Questions

What is IS200JPDFG1AED?
It is a Power Distribution Board developed by GE.

What are the voltage feedbacks used for in the diagnostic system?
The two 125 V DC voltage feedbacks are used for determining voltage magnitude, Ground fault detection, AC signal presence detection.

How do the fused DC supply indications work in the diagnostic system?
The fused DC supply indications monitor the supply voltage levels across different points. Specifically, there are six switched/fused DC supply indications for connections J1R, J1S, J1T, J7X, J7Y, and J7Z, and three fused DC supply indications for J8A, J8B, and J12. These indications help ensure proper operation and alert for any issues related to power supply.

What is the purpose of the hardware test rings labeled PDC Probe and NDC Probe?
The two hardware test rings, labeled PDC Probe (HW1) and NDC Probe (HW2), are used for attaching test equipment. These probes allow for easy connection to the diagnostic system for monitoring or troubleshooting purposes, with each probe having a series 100 kohm resistor for accurate measurements.