11/7/2022 0 Comments Fuse panelOperational mode and is red when in the maintenance mode of operation. The OP/MAINTLED is green when the Jumper board is in normal Plug connects both A and B power feeds to the fuse panels so one or both diode boardsĬan be safely removed. In the maintenance position, the connector For maintenance operation, the jumper board has to be removed and theĬonnector plug moved to the second connector. During normal operation, the connector plug is seated on the firstĬonnector. The Jumper board has two connectors and aĬonnector plug. Of the FAP.The Maintenance (Jumper) board allows the removal of one or bothĭiode boards without taking down the system. The LED is green when input power isĪpplied to that bus of the FAP and is red when there is no input power to that bus Indicates the input power state to the FAP. The entire load when there is a loss of input power on the other bus. There are two diode boards in the FAP, one for bus A and one for bus B.Įach diode board contains power diodes and circuitry which allow one bus to pick up The alarm board contains a FUSELED to indicate a failed fuse (forĮither bus A or B) and LEDs to indicate Critical, Major, and Minor alarms generatedīy the system that are applicable to that frame which the FAP is installed. The fuse holders are to the left and right of these boards as These boards are located at the frontĬenter of the FAP. The FAP P/N 870-2320-xx can be installed in heavy dutyīoard, two diode boards, and a jumper board. Refer to Maintenance for additional information to place the FAP into Maintenance Mode of operation.įigure 5-2 and Table 5-2 describes the front panel configuration of the fuse and alarm panel (P/N 870-2804-01). With the Shorting board in the bypass mode, the OR’ing function is not available. The Shorting board has an LED which is off when the board is in normal operational mode and is green when in the bypass mode of operation. In the bypass position, both A and B power is connected to the fuse blocks so the diode board can be safely removed. For maintenance operation, the Shorting board has to be removed, flipped over, and reinstalled. This permits periodic maintenance of the diodes without having to power down or remove the unit from the shelf. The Shorting board allows the removal of the diode board without taking down the system. The diode board in the FAP contains power diodes and circuitry which allow one bus to pick up the entire load when there is a loss of input power on the other bus. The Fuse Alarm LED indicates the failure of a fuse. The FAP also contains two fuse blocks, one to the left (A-side) and one to the right (B-side) of diode and shorting boards, consisting of 20 fuse positions each. These boards are located at the front center of the FAP. The FAP contains a Diode board and a Shorting board. The LEDs indicate alarms generated by the system that are applicable to that frame which the FAP is installed. An unlit Power Alarm LED indicates a failed LED or no input power to either bus of the FAP.Īlarm LEDs to indicate Critical, Major, and Minor alarms are located to the left of the diode board. The LED is green when input power is applied to that bus of the FAP and is red when there is no input power to that bus of the FAP. The Power Alarm LED indicates the input power state to the FAP. The FAP (P/N 870-2804-01) is a low-profile (1U) unit that can be installed in the Control Frame (CF) and the Extension Frame (EF).
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