Jpdg Core Power Distribution; Auxiliary Board Supported - GE Mark VIeS System Manual

10.6 JPDG Core Power Distribution

The IS410JPDHG Power Distribution board provides distribution of 28 V dc (control power) and 48 V / 24 V dc (wetting
power) to other boards within the control system. It also provides sensing circuitry for two channels of ac distribution. The
JDPG 28 V dc distribution section is designed to accept two separate power supply inputs through external diodes. With the
PPDA I/O pack, the JPDG integrates into the PDM system feedback. JPDG can support sensing and diagnostic for two ac
signals, which are distributed outside this board.
For control power distribution, the JPDG board receives 28 V dc input power from external ac/dc or dc/dc converters and
distributes power to the control system. The JPDG provides fuse protection for all 28 V dc outputs. For wetting power
distribution, the JPDG is able to operate at either 24 V dc or 48 V dc. The board receives dc power from two power supplies
through external diodes and distributes it to terminal boards and other system loads.
The JPDG does not supply power to bulk 500 W - 24 V input / 28 V output power supplies that provide I/O pack control
power. The JPDG supports a floating dc wetting power bus that is centered on earth by using resistors. It provides voltage
feedback through the PPDA to detect system ground faults.
10.6.1 Compatibility
The JPDG can host a Power Distribution System Feedback (PPDA) I/O pack. It can also receive diagnostic feedback signals
from up to three other distribution boards and route these signals to the PPDA I/O pack. Since the PPDA I/O pack is mounted
on the JPDG module, there is no need to transmit diagnostic signals from JPDG to other power distribution boards.
The following table lists all valid combinations of the JPDG with other power distribution boards.
Main Board
JPDG
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Two JPDGs cannot be used in the diagnostic daisy chain for the power distribution system, and JPDS cannot be used along
with JPDG. Only one JPDE can be used along with JPDG. Two JPDEs are not allowed with JPDG in the power distribution
scheme. Two JPDFs can be used along with JPDG.
PDM Power Distribution Modules
JPDE1 24 V JPDF1 125 V
N
N
N
N
N
N
Y
Y
Y
Y
Y
Public Information

Auxiliary Board Supported

JPDF2 125 V
N
N
Y
Y
Y
Y
N
N
Y
Y
Y
JPDB1 ac
N N
N Y
N N
N Y
Y N
Y Y
N N
N Y
N N
N Y
Y N
GEH-6855_Vol_II System Guide 373