IS210JPDDG1A is a DC Power Distribution Board Manufactured and designed by General Electric as part of the Mark VI series used in GE speedtronic Gas Turbine Control Systems. The JPDD board provides DC power distribution, isolation, and branch circuit protection for control or I/O functions requiring 125 V dc or 24 V dc power. Typical applications include dc relay solenoid control power and contact wetting. Each output consists of a fuse, a switch, and a lamp to indicate the presence of output voltage. JPDD is not intended to distribute power to the I/O packs.
OUTPUTS: Six identical output circuits are provided. Each output circuit includes two fuses, a switch with a pair of isolation contacts on each side of the output, and a green lamp to indicate the presence of voltage across the output terminals. The provision of a fuse and switch contact on each side of the DC path allows the use of this board with floating power sources.
CONFIGURATION: It is possible to use other fuse ratings with this board to provide specific branch circuit ratings. A typical series of fuses that work with this board is the Bussmann ABC series of fuses with ratings from 1⁄4 A through 15A. Fuses above 15A shall not be used with this board. If alternate fuse ratings are used, the configuration of the board requires the insertion of the proper fuse in each branch circuit.
Installation
JPDD is held in a plastic holder, which mounts on a vertical DIN rail. When installing the JPDD, it is important to provide a ground lead from TB1 to the system ground. This creates a ground path for the metal switch bodies. Power input can be either 24 V dc or 125 V dc, but not both together. For cable destinations, refer to the circuit diagram. TB1 should be connected to the system ground.
Operation
The following figure shows how the 125 V dc or 24 V dc power is distributed in JPDD, and how it reaches the TRLY and TBCI boards. Multiple JPDD boards can receive power from a single Main Power Distribution Module branch circuit. Power input can be either 125 V dc or 24 V dc nominal. Two 2-Pin Mate-N-Lok connectors are provided for 125 V dc power. One connector receives input power and the other can be used to distribute 125 V dc power to another JPDD board in a daisy chain fashion. Two 4-pin Mate-N-Lok connectors are provided for 24 V dc power. These perform functions similar to those of the 2-pin connectors above. The 4-pin connector permits parallel connection of two pin-pairs for increased current capacity. It is expected that neither side of the DC power input is grounded.
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