Tripp Lite SU60KX manual Watchdog for System MCU

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2 Theory of Operation (continued)

2.9Bypass SCR Driver (continued)

(a)The bypass SCR driver signal “BYPSTS1” is controlled by MCU or “TOBYP_J” according to the signal “CENTRAL_OK.”

(b)“CENTRAL_OK” is the output of MCU watchdog. If MCU is operating normally, “CENTRAL_OK” will be high and the bypass SCR driver signal will be controlled by “BYPSTS” (1) (high active). If MCU is not operating normally, “CENTRAL_OK” will be low and the bypass SCR driver signal will be controlled by “TOBYP_J” (high active).

(c)UM9 is a 45 kHz self-oscillator that can provide pulse signal for driver bypass SCR.

(d)The “TOBYP_J” signal is limited by “#TOBYP_I.”

2.10Watchdog for System MCU

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

RM71

CM39

SYS RDY

(4) QM3

RM81

1	RM86
2	DM24

CNM2

2.5X2P G1

					5VS
			LEDM1
		5VS	LED(GRN)
	CM36	5VS
	CM36
G1		RM72
4	8	RM72	3	RM1
	R	Q			CENTRAL OK
					(70)

2 TRIG		VCC	DIS 7
5	CVolt	GND	THR	6
	CVolt		THR
			UM3
		1	UM3
CM45			TLC555C
CM45
			G1 CM46
QM5			RM89		RM88	5VS
						5VS

(a)SYS_RDY (4) will send out a pulse to reset CM46. CM46 will then be recharged by 5V through RM88. “CENTRAL_OK” will maintain a high level. If SYS_RDY (4) does not send out a pulse during a speciﬁc period (for example, during an MCU crash), then “CENTRAL_OK” will be low.

(b)Test JUMP (CNM2): If CNM2 is shorted, then “CENTRAL_OK” will be low. If CNM2 is opened, “CENTRAL_OK” will stay high during normal operation.

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Contents Th Street, Chicago, IL 60609 USA Table of Contents Technical Speciﬁcations Basic OperationKX Models KTV Models SU40K SU60K SU60KTV SU80KTVSU80K Model Model Capacity SU80K 80kVA/64kWAdvanced Features FeaturesControl Panel Features Front and Rear Panel Features 3a SU40KX front3b SU40KX rear 3c SU40K front 3d SU40K rear 3e SU80K front 3f SU80K rear Operating Principles Internal Battery LayoutSystem Layout 3a Power Module Block Diagram Power Module LayoutOpening and Closing the Unit Online Normal Mode Single UPS Battery Backup Mode Single UPSAuto Bypass Mode Single UPS Manual Bypass Mode Single UPSBattery Backup Mode Parallel UPS Online Mode Parallel UPSAuto Bypass Mode Parallel UPS Manual Bypass Mode Parallel UPS Hot Standby Mode Parallel UPSControl Panel and Breaker Diagrams Normal LED Battery LED Bypass LED Fault LEDPreliminary Checklist Single UPS Standard Start-Up Procedure Single UPSBattery Start-Up Procedure Single UPS Manual Bypass Procedure Single UPS Shutdown Procedure Single UPSPreliminary Checklist Parallel UPS Start-Up Procedure Parallel UPSShutdown Procedure Parallel UPS Manual Bypass Procedure Parallel UPS Switching from Manual Bypass to Normal Mode Parallel UPS Printed Circuit Boards PCB SU80KX SU60KX SU40KX SU80KTV SU20KXPCB Location System F3 FB M LA, LB, LC, LD Models LA, LB, LC LA, LB, LC, LD F1BYP F1MAIN F2BYP F2MAIN LCD PCB Location Power Module PCB Board Name DescriptionBlock and Wiring Diagrams 1a SU20KX Block Diagram1c SU40KX Block Diagram KX ModelsAuxiliary Power Failure Detection DC Auxiliary Power CircuitTheory of Operation Output Current Detection W18Input Voltage Detection Located at NH-SYS-M board System MCU and Control CircuitOutput Voltage Detection Located at NH-SYS-M board System MCU and Control CircuitBattery Voltage Detection UP10BBypass SCR Short-Circuit Detection Scrst RBypass SCR Driver TSA1Watchdog for System MCU LCD Panel Control Circuit To LCDFan Control Circuit Located on NH-SYS-M board System MCU and Control CircuitBypass SCR Temperature Detection Communication Circuit for RS232RS232 Port Communication Circuit for SlotsCommunication Circuit for Output Dry Contact Output DRY ContactCommunication Circuit for Input Dry Contact and Repo Input DRY ContactExternal Battery Cabinet Temperature Detection EXTBTEMP1Detection Circuit for Manual Bypass Switch Detection Circuit for Output BreakerControl Circuit for Power Module CentralokTo PM1 to PM2 CM93 CM106 CM109 Control Circuit for External ParallelTheory of Operation Emergency Power Off EPO Communication01 RS232 Port 02a Front Control Panel02b Remote Emergency Power Off Repo02c Setting Eeprom on the NH-M Board Polling and Updating EepromCalibrating 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 Battery Strings Internal BatteryFront View of SU20KX and SU40KX Installing and Removing Internal Batteries Terminals Battery compartment. Warning Observe proper polarity by Connecting negative to negative black to black and positiveDamage the UPS system and create a serious risk of personal Injury and property damageBattery Cabinet 2a BP480V26B 2b BP480V40CInternal Battery 2f Wiring between UPS and Battery Cabinet 2e Connection between UPS and Battery Cabinet2d W1 and W2 Cables Alarm Messages Troubleshooting1a Warning Message List 1b Power Module Warning Message List ConditionTroubleshooting Flow Charts Main VOLT/FREQ NOKMain Sequence NOK Bypass VOLT/FREQ NOK Bypass Static Switch Over Temperature Bypass Sequence NOKBypass Static Switch Fault Bypass Static Switch OverloadSame fault message? Replace the power module UPS Internal Comm AbnormalBattery Over Charge Battery Test Fail10a Battery BAD 11a 11bBypass FAN Failure 12a 12b 12cTransformer Overheat 13a 13bPS Output Volt NOK 14a 14bPS EXT Parallel Comm Abnormal 15a 15bParallel Failure 16a 16bRedundancy Loss 17aPower Module Failure Power Module Identify115 116 Power Module Replacement AC Input DC Input Output 119 120 Preventive Maintenance Safety OverviewUPS Procedure Suggested tools and suppliesInternal Battery Procedure Appendix a Service Equipment and Tools Recommended Equipment and ToolsSoftware Tools Multi-Meter OscilloscopeAppendix B Torque Table KX ModelsTable B.1 Fig B.aTable B.2 ModelsTable B.3 Fig B.b Fig B.c Table B.4 KTV ModelsFig B.d NH-SYS-P Board Appendix C PCB and Test PointNH-SYS-R Board