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IIS_550-HE_normally-on.EPS

INVERTER - ALWAYS ON FIXTURE

WHITE

ORG/BLK (120 / 277V)

COMMON

120 / 277V

WHITE/BLU (NEU)

GREEN

GROUND

GRAY

VIO/YEL

NEUTRAL

120 / 277V

(CIRCUIT MUST BE ISOLATED 
FROM NORMAL CIRCUITS)

EMERGENCY LOAD

LINE

BLK (120 / 277V)

1

NORMAL AC INPUT -

“FLYING LEADS”

(UNSWITCHED)

OUTPUT

INVERTER AC INPUT -

“INPUT LEADS”

 

(UNSWITCHED)

IIS INVERTER

2

3

INVERTER AC INPUT (1) AND NORMAL 
AC INPUT (2) LEADS MUST BE FED 
FROM THE SAME BRANCH CIRCUIT.

Wiring

INSTALLATION INSTRUCTIONS

CAUTION:   Before installing, make certain the A.C. power is off.

NOTE:

 The battery is shipped in separate packaging for ease of handling. Store the battery in a cool, dry and safe  

location until ready for installation. The battery may be kept in storage for up to 3 months without recharging.

CAUTION: 

This is a universal input and output voltage unit. It can be connected to a 120 - 277 volt supply. 

 

The input and output voltages must match

.

Mounting the IIS-550-HE

1) Remove the front cover of the 

IIS-550-HE 

by removing the two (2) screws located at the top of cover.

2) Knock out the keyhole slots in the rear of the unit and use for mounting the

 IIS-550-HE

 securely to the wall. After removing the 

keyholes, hang the unit on two 1/4”-20 screws (Grade 2 or better) attached to the wall studs.  An additional pair of 1/4”-20 screw holes 
are provided underneath the electronics shelf. Code requires that additional screws be used through these holes to prevent the unit 
from being inadvertently lifted up off the keyhole slots. 

Do not drill any holes in this unit

.

 

3)

 

Extend an unswitched AC supply, switched AC supply (if used), and the load wires to the unit. 1/2

 conduit knockouts are provided in 

the top, back and sides of the unit for wires to pass through. NOTE: Input and output wires must be run in separate conduits. 

CAUTION

Do not drill holes into the cabinet; drill filings may damage the unit and keep it from operating.

CAUTION: The IIS-550-HE must be mounted securely. Do not rely on the junction box for supporting the weight of the unit. 
Mount the IIS-550-HE securely to the wall using the keyhole slots provided, or mount it on a secure platform.

ALWAYS CONSULT LOCAL CODES FOR STRUCTURAL REQUIREMENTS WHEN MOUNTING THE UNIT.

FIGURE 1 - 

IIS-550-HE  WIRING CONNECTIONS

IIS_550-HE_switched.EPS

INVERTER - SWITCHED FIXTURE

WHITE

ORG/BLK (120 / 277V)

COMMON

120 / 277V

WHITE/BLU (NEU)

GREEN

GROUND

GRAY

VIO/YEL

NEUTRAL

120 / 277V

(CIRCUIT MUST BE ISOLATED 
FROM NORMAL CIRCUITS)

EMERGENCY LOAD

LINE

BLK (120 / 277V)

1

NORMAL AC INPUT -

“FLYING LEADS”

(SWITCHED)

OUTPUT

INVERTER AC INPUT -

“INPUT LEADS”

 

(UNSWITCHED)

2

3

WALL SWITCH

IIS INVERTER

INVERTER AC INPUT (1) AND NORMAL 
AC INPUT (2) LEADS MUST BE FED 
FROM THE SAME BRANCH CIRCUIT.

IIS_550-HE_em-only.EPS

INVERTER - EMERGENCY OPERATION ONLY

WHITE

ORG/BLK (120 / 277V)

COMMON

120 / 277V

WHITE/BLU (NEU)

GREEN

GROUND

GRAY

VIO/YEL

NEUTRAL

120 / 277V

(CIRCUIT MUST BE ISOLATED 
FROM NORMAL CIRCUITS)

EMERGENCY LOAD

LINE

BLK (120 / 277V)

1

NORMAL AC INPUT -

“FLYING LEADS”

(UNSWITCHED)

OUTPUT

INVERTER AC INPUT -

“INPUT LEADS”

 

(UNSWITCHED)

2

3

CAP UNUSED

LEADS

IIS INVERTER

INVERTER AC INPUT (1) AND NORMAL 
AC INPUT (2) LEADS MUST BE FED 
FROM THE SAME BRANCH CIRCUIT.

- ALWAYS ON FIXTURES

Fixtures are used for both normal and 
emergency power conditions.  During 
a loss of normal AC power, the IIS 
automatically senses the drop in line 
voltage, and powers the fixtures with its 
internal battery.  

- SWITCHED FIXTURES

Fixtures are used for both normal and 
emergency power conditions, and are 
controlled by a local switching device.  
During a loss of normal AC power, the 
IIS automatically senses the drop in line 
voltage, and powers the fixtures with 
its internal battery, regardless of the 
position of the switching device.  

- NORMALLY OFF FIXTURES

Fixtures on the emergency circuit are 
used in emergency mode only, and 
are not energized during normal power 
conditions (Note: Normal AC Input leads 
are not connected). 

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