51308373-175  CC-TD0B11 | Honeywell | Circuit Card

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Power disconnects at the AUX terminal. Input 1 and Input 2 supervision circuits open. The yellow "AUX" LED lights. The trouble relay is de-energized. The trouble restores when the overcurrent condition no longer exists. When a circuit goes into a power limited state, it will reverse the polarity of the voltage at the terminals and verify the load. 

If it is more than 1k ohms, the power limit will self-restore. This does not automatically occur for some devices typically connected to auxiliary power. Power limit conditions do not restore in reverse polarity monitoring if the devices are not polarized (for example, some door holder devices). To allow automatic restores for power-limited auxiliary circuits, it is recommended that all non-polarized devices be polarized using a diode in series with each device.

The eight LEDs indicate a fault in one of the circuits (either NACs 1 through 4, auxiliary power, earth fault, low AC, or battery). A fault in the LED's corresponding circuit will light the LED (labeled on the board).

621-1100

XP502

51304427-100 MU-TDOR22

621-1160R

621-1160R

621-0007R

51304425-100 MU-TDPR02

51304441-125 MU-TDID12

51303997-100

T775E1056

51303982-400 

51304685-200+51401598-200

51304483-100 

51304518-200 

XDL505

XD50-FCL

XD50-FC

51303979-400

51304518-150

51304685-150+51401598-150

51304685-100+51401598-100

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