Emerson NT5C06D user manual DC Circuit Breaker, AC Line Fail Alarm, Sense Fail, Fan Alarm

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Installation and start-up 25

Table 6 - Rectifier and Controller interface connections (26-pin connector) ( continued )

Pin #	Designation	Description	Signal
23	DC BRK ALM	DC Circuit Breaker	NC
24	AC FAIL ALM	AC Line Fail Alarm	NC
25	SENSE FAIL	Sense Fail	NC
	ALM
26	FAN ALM	Fan Alarm	NC
	Note:	The normally closeed (NC) annotation signifies that the
		alarm is sent when the contact between the alarm (NC)
		and alarm common is closed (short-circuited). The alarm

RFA (C) and alarm common pins 17 and 18 are floating. These two alarm commons must be connected to the bat RTN at the system level for applications requiring non- floating alarm signals. The rect (1) indicates the rectifier in position (1) located on the right side of the MPS75 shelf.

In applications where no controller is available or desired, the current sharing functions among rectifiers in SLOPE or FORCE mode are still available. The signal cable remote sense connections RC- and RG+ must be connected to the desired remote sensing location ( batteries). In forced share mode, the forced share signal line of each shelf must be connected together in a daisy chain fashion. See Figures 7A and 7B for suggested methods of connecting the signal wire.

Helios Rectifier 25/48 Installation and User Manual

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Contents P0831010 Standard 7.00 May Helios Rectifier 25/48 Single Phase -48V, 25 aPage Helios Rectifier 25/48 Single Phase -48V, 25A Page Publication history This page is left blank intentionally Contents Contents List of Figures List of ProceduresShelf List of TablesThis page is left blank intentionally Description IntroductionApplications MPS75 NT5C10CX  power shelf 23-inchEquipment Identification MPS75 Modular Power Shelf-NT5C10C with 8-pin signal cables NT5C06D Switch Mode Rectifier Electrical specifications SpecificationsElectrical specifications Output noise and ripple Efficiency and Power FactorReliability Heat DissipationTransportation Environmental specifications OperatingStorage Specifications Installing the power shelf Installation and start upTools and test equipment Procedure 1 Installing the power shelf Step Action Wiring the power shelfAC cable wire size Installing the AC powerAWG for each rectifier Max for each rectifierPower shelf individual AC connection DC Conductors InstallationConnecting the DC power shelf Control and Alarm ConnectionsRectifier 1 fail alarm Rectifier Failure AlarmRectifier 2 fail alarm Rectifier 3 fail alarmFan Alarm AC Line Fail AlarmDC Circuit Breaker Sense FailA0384387 SIG NAL Cables FRO M Shelves Factory setting Installing the rectifierVerification High Voltage Shutdown Hvsd Adjustment Procedure 4 Starting up the rectifier StepFloat Voltage Adjustment Rectifier meter accuracy= 52.2 + .15 V = 52.35 Current Limit Verification CL Ii Forced ShareLoad Sharing Procedure 5 Adjusting the load share Step Action Load Share Adjustment ProcedureSlope Load Share Forced Load ShareOperation Front panel controls FeaturesLocal float / equalize control High voltage shutdown Hvsd localIndicators Start-up delayRectifier failure alarm RFA Fan failure alarmLocal ON/OFF control AC breaker Sense fail alarm SEN FailRemote ON/OFF control Remote voltage sensingParallel operation Sequential startDischarge of output capacitors Power interface edge connector Local / remote high voltage shutdown resetInput AC voltage monitor Thermal shutdownPower interface connections Signal interface connectorControl signal connections Procedure 6 Adjusting the float / equalize Step MaintenanceFloat / equalize Cooling fan High voltage shutdown HvsdFan failure Fan replacement NT5C06D rear view Power shelf This page is left blank intentionally Alarm indication RFA fault TroubleshootingSystem fault diagnosis Fault symptom Possible causes Erratic load fault SEN Fail faultCurrent or voltage float fault Fault symptom Possible causesCPC Appendix a Replacement partsAppendix a Replacement parts Local toll-free prefixes Appendix B Technical service assistanceCountry Toll-free technical assistance numbers Appendix B Technical service assistanceUnited States Canada Europe Asia and the Pacific List of terms and acronyms Normally Open Rectifier Fail AlarmNorthern Telecom Sense FailPage Part of Emerson Network Power