10.5.6
Diagnostics
Diagnostic signals routed into PPDA through connector P1 include:
•
An electron|ic ID identifying the board type, revision number, and serial number
•
Two analog battery voltage feedbacks. One is for positive bus and one is for negative bus. Voltage feedback accuracy is
±1%.
•
Three switched/fused dc branch circuit status signals
•
Two dc power converter output status dry contact status signals
•
Three fused branch circuit status signals
•
Two test points with series 2.15 kΩ resistors are provided on the 24/48 V dc bus for external test equipment. HW1 is
connected to the positive bus and HW2 is connected to the negative bus.
Note
Fuse and dry contacts failure diagnostics will not be generated if
InputDiagEnab
on the dc input is set to Disable or the
dc input is below 42 V.
10.5.7
Configuration
When jumper JP1 is in place, the JPDE provides 6 kΩ voltage-centering resistors from positive and negative dc to the local
earth connection. When JP1 is removed, the connection to earth is opened. Insert JP1 when a floating dc bus needs to be
centered on earth.
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Страница 153: ...TRLYS1D Circuits TMR YDOA Discrete Output Modules GEH 6855_Vol_II System Guide 153 Public Information ...
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