Emerson 250 Switch Auxiliary Inputs Dry Contacts, Control Status Output Dry Contacts

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UPS Electrical Installation

Switch Auxiliary Inputs Dry Contacts

	Table 3	Circuit breaker or switch auxiliary contact Inputs

			Terminal		Connects to	Description
		Item	Block	Pin	(description of external item)	of interface
				1	CB or Switch aux. contact,	Input, protected
				1	closed = CB or switch is closed	Input, protected
					closed = CB or switch is closed
	Rectifier Input Breaker		TB0810	2	CB or Switch aux. contact, common	+24V, 10mA,
	(RIB), Form C		TB0810	2	CB or Switch aux. contact, common	current limited
	(RIB), Form C					current limited
				3	CB or Switch aux. contact,	Input, protected
				3	closed = CB or switch is open	Input, protected
					closed = CB or switch is open
				1	CB or Switch aux. contact,	Input, protected
				1	closed = CB or switch is closed	Input, protected
					closed = CB or switch is closed
	Maintenance Isolation		TB0811	2	CB or Switch aux. contact, common	+24V, 10mA,
	Breaker (MIB), Form C		TB0811	2	CB or Switch aux. contact, common	current limited
	Breaker (MIB), Form C					current limited
				3	CB or Switch aux. contact,	Input, protected
				3	closed = CB or switch is open	Input, protected
					closed = CB or switch is open
				1	CB or Switch aux. contact,	Input, protected
				1	closed = CB or switch is closed	Input, protected
					closed = CB or switch is closed
	Bypass Input Breaker		TB0812	2	CB or Switch aux. contact, common	+24V, 10mA,
	(BIB), Form C		TB0812	2	CB or Switch aux. contact, common	current limited
	(BIB), Form C					current limited
				3	CB or Switch aux. contact,	Input, protected
				3	closed = CB or switch is open	Input, protected
					closed = CB or switch is open
				1	CB or Switch aux. contact,	Input, protected
				1	closed = CB or switch is closed	Input, protected
					closed = CB or switch is closed
	Maintenance Bypass		TB0813	2	CB or Switch aux. contact, common	+24V, 10mA,
	Breaker (MBB), Form C		TB0813	2	CB or Switch aux. contact, common	current limited
	Breaker (MBB), Form C					current limited
				3	CB or Switch aux. contact,	Input, protected
				3	closed = CB or switch is open	Input, protected
					closed = CB or switch is open

Control Status Output Dry Contacts

Status signals are outputs through volt-free, normally open and normally closed contacts.

Table 4	Control status output contact

		Terminal		Connects to	Description
Item		Block	Pin	(description of external item)	of interface
			1	Other equipment input,	Relay contact, 12A, 250VAC, normally
			1	closed = EPO not active	closed, rest position = closed
EPO Status				closed = EPO not active	closed, rest position = closed
EPO Status		TB0823	2	Other equipment input, common	Relay contact, common
Form C		TB0823	2	Other equipment input, common	Relay contact, common
Form C
			3	Other equipment input,	Relay contact, 12A, 250Vac, normally
			3	closed = EPO active	open, rest position = open
				closed = EPO active	open, rest position = open
			1	Maintenance Bypass Cabinet,	Relay contact, 12A, 250Vac, normally
			1	closed = load not on inverter	closed, rest position = closed
Maintenance				closed = load not on inverter	closed, rest position = closed
Maintenance				Maintenance Bypass Cabinet,
Bypass		TB0821	2	Maintenance Bypass Cabinet,	Relay contact, common
Bypass		TB0821	2	common	Relay contact, common
Enable Form C				common
Enable Form C
			3	Maintenance Bypass Cabinet,	Relay contact, 12A, 250VAC, normally
			3	closed = load on inverter	open, rest position = open
				closed = load on inverter	open, rest position = open

2.3.2Load Bus Synch Connection

Table 5 Load Bus Synch connection

		Terminal		Connects to
	Item	Block	Pin	(description of external item)	Description

	Analog Load		1	Phase A from LBS	Input to voltage dropping resistors

		TB0826	3	Phase B from LBS	Input to voltage dropping resistors
	Bus Sync. (LBS)	TB0826	3	Phase B from LBS	Input to voltage dropping resistors
	Bus Sync. (LBS)
			5	Phase C from LBS	Input to voltage dropping resistors

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Contents

Liebert NXL Product Warranty Registration Contacting Liebert for SupportTable of Contents Figures Important Safety Instructions Page Preliminary Checks SINGLE-MODULE Mechanical InstallationIntroduction Environmental ConsiderationsPositioning System CompositionMaintenance Bypass Cabinet Cable Entry External Protective Devices Power Cables UPS Electrical Installation Dual InputPower Cable Connection Procedure Top Cable EntryControl Cable and Communications External Interface Board connections layoutControl Status Inputs Dry Contact Dry ContactsEPO Input Dry Contact Remote EPO inputLoad Bus Synch Connection Switch Auxiliary Inputs Dry ContactsControl Status Output Dry Contacts Optional Equipment Single-Module System OptionsCommunication and Monitoring Installation Drawings Main components location, 250kVA Liebert NXL UPSTop View Doors Open Doors and Inner Skins Removed Outline drawing, 300kVA Liebert NXL UPS Front Front View Side View Front View Right Side View Front Doors Removed Front Detail a Battery & DC Parameters SpecificationsLiebert NXL UPS specifications 250 300 400 Input Parameters250 300 400 Physical Parameters and Standards, in mm Environmental ParametersCurrent ratings-rectifier input Current ratings-batteryLiebert NXL system and inverter efficiencies Current ratings-bypass inputRectifier Input BatteryRecommended conduit and cable sizes Bypass InputRecommended lug sizes Series Cable Size One Hole Two HoleTi n Ne tIti That

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