REPLACEMENT CIRCUIT BOARD & BATTERY KIT
ELPS-K50 KIT CONSISTS OF:
(1) Circuit Board & Charger Assembly with Mounting Bracket
(1) IF- 1510-A Instructions
(1) Sealed Ni-CAD Battery
(1) 2 Volt LED for Pilot Light
(1) CID101 Corrosion Inhibitor Device
This kit includes a new, LED indicating lamp that gives a visual status of the unit. Details
indicating LED logic is given below:
No Light AC power is removed from circuit
• Steady Light (No blinks) Fully Charged
• Light Blinks Once Charging
• - • Light Blinks Twice Battery Failure
• - • - • Light Blinks Three Times Circuit Failure
Immediately after supply power is initiated the indicating lamp will blink/pulse to indicate
that the unit is charging. Once installed with supply power, the ELPS requires 72 hours to
charge the battery. Once the unit has completed charging, the indicating light will stop
blinking and go to steady. Every six months, the unit will automatically perform a 90-
minute battery discharge test.
At the completion of the test, if it is determined not to have met the 90 minute requirement,
the indicating lamp will display circuit failure (3 blinks). At any time, if the battery
connection is not adequate the indicating lamp will display a battery failure (2 blinks).
MAINTENANCE
1. Conduct periodic testing in accordance with local authority and Periodic Testing
section of these instructions.
2. Clean fixture lens and exterior surfaces periodically. We recommend every three
months or more frequently if appropriate.
3. Frequent interior inspection should be made. A schedule for maintenance check
should be determined by the environment and frequency of use. It is recommended
that it should be at least once a year.
4. Perform visual, electrical, and mechanical checks on all components on a regular
basis.
• Visually check for undue heating evidenced by discoloration of wires
or other components, damage or worn parts, or leakage evidence by
water or corrosion in the interior.
• Electrically check to make sure that all connections are clean and tight.
• Mechanically check that all parts are properly assembled.
5. Do not attempt field replacement or repair of ELPS50 Power Supply cover gasket.
Instead, remove damaged gasket and continue to use cover without gasket. This will
assure safety for use in Class I and Class II hazardous (classified) locations. However,
the enclosure will not be rain tight.
BREATHER AND DRAIN
ELPS50 power supply enclose is provided with breather and drain. Refer to Installation
and Maintenance Information IF-843 for inspection and maintenance instructions.
REMOVAL OF EXISTING CIRCUIT ASSEMBLY(For units made BEFOREOctober, 2005).
1. Disconnect branch AC power at circuit
breaker and lockout.
2. Turn "Designated disconnect" switch to
"OFF".
3. After removing all AC and DC power to the
fixture, remove all cover fasteners to gain
access to the interior.
4. Disconnect wire leads at the pilot light and switch.
5. Disconnect all incoming connections from terminals GRD (#1) through L- (#7).
6. Remove the mounting stud and pillar located in the uppermost left corner of the
interior. Remove the three other hold down nuts and lock washers on the aluminum
backplate. Remove the old interior assembly and set aside.
7. Install the new interior assembly using the three remaining hold down nuts and lock
washers removed from terminals L+ (#6) and L- (#7).
CAUTION
To avoid explosion, clean both flat joint surfaces of body and cover before closing.
Dirt or foreign material must not accumulate on flat joint surfaces. Surfaces must
seat fully against each other to provide a proper explosion proof seal.
WARNING
To avoid explosion always disconnect primary power source using designated
disconnect switch before opening enclosure for inspection or service.

IF 1510 • 05/06 Copyright © 2006, Cooper Industries, Inc. Page 6

NOTE
ELPS series emergency light fixtures were re-designed in October, 2005. Previous
models had circuit boards wired to normally closed contacts. This ELPS-K50 kit has a
new circuit board that must be wired to normally open contacts. Older units used
different style light fixture heads (see Figure 8 below).
WARNING
WARNING
To prevent injury from electric shock, all power must be removed from the fixture
during maintenance.
WARNING
To avoid explosion, do not damage the flat joint surfaces. Do not use hammers or
prying tools to handle covers. Do not handle covers roughly, or place them on
surfaces that might damage or scratch the flat joint surfaces.
Even after disconnect, batteries will still be live. To prevent electrical shock and
explosion, take extra care not to touch leads together or to ground.
IMPORTANT
A DESIGNATED DISCONNECT SWITCH IS REQUIRED FOR SAFETY, TO
POWER THE ELPS502 EMERGENCY LIGHT SYSTEM AND CHARGE THE
BATTERIES.
To avoid explosion, a Designated Disconnect switch with lock-in/lock-out
capability is required for safe servicing of the completely wired unit. The lock-
in/lock-out capability will prevent unauthorized opening of the circuit when the
system should be functioning and to help prevent energizing of the system while
it is being serviced, minimizing the possibility of arcing in the battery circuit while
the enclosure is open in a hazardous (classified) area.
Units supplied with option S794 or Option S854 already have a disconnect switch
installed on the enclosure. Standard units require a remote disconnect switch. If
the switch is also located in a hazardous area, you must install a Class 1, Div. 1,
rated switch. Use Crouse-Hinds EDS2129 or EDS2129-GB (for Group B
applications).
Figure 7. Wiring Diagram

12345 6789

ORANGE - NARANJA
BROWN - CAFE
BLACK - NEGRO
WHITE - BLANCO
MAIN CHARGER
TRANSFORMER
TRANSFORMADOR
PRINCIPAL DE
CARGA
BATTERY
BATERIA
21G03
RED - ROJO
GRD COM 120 220 277
TERMINAL BLOCK
BLOCK DE TERMINALES
PILOT LIGHT
LAMPARA PILOTO
TEST SWITCH
BUTON DE PRUEBA BATTERY DISCONNECT
SWITCH
INTERRUPTOR
DESCONECTADOR
DE BATERIA
EVLA12'S
127 240
RED - ROJO
YELLOW - AMARILLO
RED - ROJO
L+
L-
YELLOW - AMARILLO
YELLOW - AMARILLO
BLUE - AZUL
BLUE - AZUL
BLACK - NEGRO
RED - ROJO
BLACK - NEGRO
Figure 8
1 = GRD 4 = 220/240 7 = L -
2 = COM 5 = 277 8 = BATT +
3 = 120 6 = L + 9 = BATT -