IS400JPDDG1A GE Mark VIe

The GE IS400JPDDG1A is a dedicated DC power distribution module (JPDD, Jumper Power Distribution DC) in the GE Mark VIe series. This module is a new rack-specific accessory for the Mark VIe system and differs from the IS200JPDBG1A used in the older Mark VI system in terms of dimensions and backplane pins; the two are not interchangeable.

Serving as the “energy dispatcher and safety officer” within the Mark VIe rack, this board’s core responsibility is to safely and reliably distribute the dual-redundant 24V DC power input from external sources to the rack backplane, providing a stable operating power supply to controllers, I/O cards, communication modules, and other components installed in the slots. 

It is important to note that this module does not perform voltage conversion or rectification; it is solely responsible for distributing the existing DC power. The actual AC/DC conversion is performed by power conversion modules such as the IS200EPSMG1A.

• Supports dual 24V DC redundant inputs with an input voltage range of 18-36V DC
• Equipped with three independent 15A fused output circuits (JFA/JFB/JFC), with a maximum total continuous load of 30A
• Built-in EMI LC input filter, reverse polarity protection diodes, solid-state overcurrent shutdown protection
• Thermal shutdown protection at an internal temperature of +75°C
• 50-pin diagnostic connector for telemetry of the I/O package
• Front-panel PWR/FAULT LEDs provide visual indication of input/output status
• Operating temperature range: 0°C to +65°C

• Power Generation: Power distribution for Mark VIe turbine control systems in gas/steam power plants
• Oil and Gas: Critical power supply for turbine and compressor control cabinets in refineries and offshore platforms
• Process Industries: Isolated DC power supply for PLCs, HMIs, and safety systems in chemical and petrochemical plants
• Heavy Machinery: Control power distribution for high-speed, heavy-duty industrial equipment

At a combined-cycle power plant, the IS400JPDDG1A is deployed within the Mark VIe main control cabinet to provide a clean, fused 24V DC power supply to the ERIO, SPID, and analog I/O VME modules.

Dual-redundant filtered power inputs eliminate the risk of downtime caused by the loss of a single power supply, while three isolated, fused circuits confine short-circuit faults to a single I/O group. The integrated diagnostic connector enables technicians to quickly locate power supply anomalies.

• Is the IS400JPDDG1A hot-swappable?
  No. The IS400JPDDG1A is a passive power distribution card and does not support hot-swapping. Before replacing it, you must turn off the power to the PDM rack or isolate the relevant power supply section.
• What input voltages does this module support?
  The standard configuration supports dual 24V DC inputs (18-32V DC). Some versions also support dual-voltage inputs of 125V DC + 28V DC.
• Is the IS400JPDDG1A a power supply module or an I/O module?
  It is a power distribution/interface module (JPDD), not a power conversion module (such as the IS200EPSMG1A, which converts AC to DC), nor is it a general-purpose I/O module.
• What is the warranty period for this module?
  Typically, the warranty period for original products is 12 months.