Tripp Lite SU60KX manual Theory of Operation, DC Auxiliary Power Circuit

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2 Theory of Operation (continued)

2.2 DC Auxiliary Power Circuit (continued)

Located at NH-SYS-M board (System MCU and Control Circuit)

RM42	RM43
5VS	RM43
K-ON		KEY_ON
	CM24	(21)
	G1

(a)The input of DC auxiliary power circuit is from positive battery.

(b)MCU detects the “on” key (on LCD board) status through KEY-ON(21)

AUXON	RM22
AUXON	AUX-ON
(64)	RM26
AUXOFF	AUX-OFF
(44)

(c)When AC auxiliary power circuit is activated and battery is present, AUXON (64) is high and DC auxiliary power circuit will be on.

(d)If AUXOFF (44) is high during backup mode, DC auxiliary power will be off.

2.3Auxiliary Power Failure Detection

Located at NH-SYS-P board (Auxiliary Power for System, Detect Circuit for Voltage and Current)

	RP20	DP11
	+12VS
	RP18
	+12VB	QP8
	ZDP5	QP8
	ZDP5
	RP19
	G1	DP12
	RP23
	+12VS
	RP21
	+12VP	QP9
	ZDP6	QP9
	ZDP6
	RP22

AUX-FAIL

QP10

RP24

G1G1

Located at NH-SYS-M board (System MCU and Control Circuit)

5VS

RM34

RM35

AUX-FAIL

	AUXFAIL
CM23	(71)

G1

+12VP is from AC auxiliary power and +12VB is from DC auxiliary power. During AC mode, +12VP and +12VB should both be live. If one or both of them fails, MCU can detect auxiliary power failure through AUXFAIL (71) (low active).

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Contents Th Street, Chicago, IL 60609 USA Table of Contents Basic Operation Technical SpeciﬁcationsKX Models SU40K SU60K SU60KTV SU80KTV KTV ModelsModel Capacity SU80K 80kVA/64kW SU80K ModelFeatures Advanced FeaturesControl Panel Features 3a SU40KX front Front and Rear Panel Features3b SU40KX rear 3c SU40K front 3d SU40K rear 3e SU80K front 3f SU80K rear Internal Battery Layout Operating PrinciplesSystem Layout Power Module Layout 3a Power Module Block DiagramOpening and Closing the Unit Battery Backup Mode Single UPS Online Normal Mode Single UPSAuto Bypass Mode Single UPS Manual Bypass Mode Single UPSOnline Mode Parallel UPS Battery Backup Mode Parallel UPSAuto Bypass Mode Parallel UPS Hot Standby Mode Parallel UPS Manual Bypass Mode Parallel UPSNormal LED Battery LED Bypass LED Fault LED Control Panel and Breaker DiagramsPreliminary Checklist Single UPS Standard Start-Up Procedure Single UPSBattery Start-Up Procedure Single UPS Shutdown Procedure Single UPS Manual Bypass Procedure Single UPSStart-Up Procedure Parallel UPS Preliminary Checklist Parallel UPSShutdown Procedure Parallel UPS Manual Bypass Procedure Parallel UPS Switching from Manual Bypass to Normal Mode Parallel UPS SU80KX SU60KX SU40KX SU80KTV SU20KX Printed Circuit Boards PCBPCB Location System F3 FB M LA, LB, LC, LD Models LA, LB, LC LA, LB, LC, LD F1BYP F1MAIN F2BYP F2MAIN LCD PCB Board Name Description PCB Location Power Module1a SU20KX Block Diagram Block and Wiring Diagrams1c SU40KX Block Diagram KX ModelsDC Auxiliary Power Circuit Auxiliary Power Failure DetectionTheory of Operation W18 Output Current DetectionLocated at NH-SYS-M board System MCU and Control Circuit Input Voltage DetectionLocated at NH-SYS-M board System MCU and Control Circuit Output Voltage DetectionUP10B Battery Voltage DetectionScrst R Bypass SCR Short-Circuit DetectionTSA1 Bypass SCR DriverWatchdog for System MCU To LCD LCD Panel Control CircuitLocated on NH-SYS-M board System MCU and Control Circuit Fan Control CircuitCommunication Circuit for RS232 Bypass SCR Temperature DetectionCommunication Circuit for Slots RS232 PortOutput DRY Contact Communication Circuit for Output Dry ContactInput DRY Contact Communication Circuit for Input Dry Contact and RepoEXTBTEMP1 External Battery Cabinet Temperature DetectionDetection Circuit for Output Breaker Detection Circuit for Manual Bypass SwitchCentralok Control Circuit for Power ModuleTo PM1 to PM2 CM93 Control Circuit for External Parallel CM106 CM109Theory of Operation Communication Emergency Power Off EPO01 RS232 Port 02a Front Control PanelRemote Emergency Power Off Repo 02b02c Polling and Updating Eeprom Setting Eeprom on the NH-M BoardCalibrating Eeprom Gain Setting Output Dry Contact Status Upgrading Firmware for the System Board Output Manual Bypass Main Input N C S T G R G I N G R a D E Communication Upgrading Firmware for the Power Module PM1 U P S T G R G I N Link the UPS to a PC via the RS232 port Communication Communication Communication T I N G L O W E D Downloading the Event Log Internal Battery Battery StringsFront View of SU20KX and SU40KX Installing and Removing Internal Batteries Terminals Connecting negative to negative black to black and positive Battery compartment. Warning Observe proper polarity byDamage the UPS system and create a serious risk of personal Injury and property damage2a BP480V26B 2b BP480V40C Battery CabinetInternal Battery 2e Connection between UPS and Battery Cabinet 2f Wiring between UPS and Battery Cabinet2d W1 and W2 Cables Troubleshooting Alarm Messages1a Warning Message List Condition 1b Power Module Warning Message ListMain VOLT/FREQ NOK Troubleshooting Flow ChartsMain Sequence NOK Bypass VOLT/FREQ NOK Bypass Sequence NOK Bypass Static Switch Over TemperatureBypass Static Switch Overload Bypass Static Switch FaultUPS Internal Comm Abnormal Same fault message? Replace the power moduleBattery Test Fail Battery Over Charge10a 11a 11b Battery BAD12a 12b 12c Bypass FAN Failure13a 13b Transformer Overheat14a 14b PS Output Volt NOK15a 15b PS EXT Parallel Comm Abnormal16a 16b Parallel Failure17a Redundancy LossFailure Power Module Identify Power Module115 116 Power Module Replacement AC Input DC Input Output 119 120 Safety Overview Preventive MaintenanceUPS Procedure Suggested tools and suppliesInternal Battery Procedure Recommended Equipment and Tools Appendix a Service Equipment and ToolsSoftware Tools Multi-Meter OscilloscopeKX Models Appendix B Torque TableTable B.1 Fig B.aModels Table B.2Table B.3 Fig B.b Fig B.c KTV Models Table B.4Fig B.d Appendix C PCB and Test Point NH-SYS-P BoardNH-SYS-R Board