Osram OTi50W Guide

READ AND FOLLOW ALL SAFETY INSTRUCTIONS
1. This product is for use with an LED lighting load and supplies up to 10W of power at factory
programmed current with a voltage between 10.0 VDC and 55.0 VDC in emergency mode for
a minimum of 90 minutes.
2. Make sure all connections are in accordance with the National Electrical Code, Canadian
Electrical Code and any local regulations.
3. To reduce the risk of electric shock, disconnect AC power of the emergency driver and fuse
from fuse holder of the battery pack before servicing.
4. This emergency driver is suitable for factory and field installation. For field installation, please
see the instructions on page 3.
5. This product is suitable for damp locations where the driver case temperature is 75°C maximum
and battery pack case temperature is 55°C maximum.
6. Do not use for outdoor applications.
7. Product is not suitable for heated air outlets and wet or hazardous locations.
8. Do not install near gas or electric heaters.
9. The use of accessory equipment not recommended by the manufacturer may cause an unsafe
condition.
10. Do not use this product for other than intended use.
11. Equipment should be mounted in locations and at heights where it will not readily be subjected
to tampering by unauthorized personnel.
12. Servicing should be performed by qualified service personnel.
13. Use caution when servicing batteries.
SAVE THESE INSTRUCTION
THIS PRODUCT CONTAINS A RECHARGEABLE NICKEL-CADMIUM
BATTERY. THE BATTERY MUST BE RECYCLED OR DISPOSED
PROPERLY.
IMPORTANT SAFEGUARDS
WHEN USING ELECTRICAL EQUIPMENT, BASIC SAFETY PRECAUTIONS SHOULD
ALWAYS BE FOLLOWED, INCLUDING THE FOLLOWING:
OTi50W Slim Emergency Driver
Installation and Troubleshooting Guide – P/N 57413

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Normal Mode Operation
When AC power is applied, the driver is in normal mode where the output current is at the
programmed setpoint. The Illuminated Test Switch light is ON (not flashing) indicating the batteries
are being charged.
Emergency Mode Operation
When power fails, the emergency driver automatically switches to emergency power, operating the
emergency LED load at required illumination. When the AC power is restored, the emergency driver
returns to the Normal Mode of Operation. This emergency driver will operate an LED lighting load with
a voltage between 10.0 VDC and 55.0 VDC and up to 10W of output power. The LED driver ensures
that there is light output for a minimum of 90 minutes.
Test Switch
The below illustration shows the test switch that is provided as an accessory with the Emergency
driver.
Figure 1: 3-Wire Illuminated Test Switch

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Figure 2: Test Switch mounting hole dimension
Installation Instructions
CAUTION:
DO NOT CONNECT BATTERY PACK TO DRIVER
UNTILL ALL INSTALLATION & WIRING IS COMPLETE. AFTER
INSTALLATION & WIRING COMPLETE, CONNECT BATTERY PACK TO
DRIVER BEFORE APPLYING AC POWER.
NOTE: Make sure the necessary branch circuit wiring is available. An unswitched source of power is
required and must be from the same branch circuit.
This product is suitable for field installation with suitable LED loads including LED luminaires, DC
voltage driven LED replacements for fluorescent lamps and others. There are a set of checks that
need to be carried out to determine if your luminaire is eligible for field installation.
1. Ensure the LED load’s rated power/current is greater than or equal to the Emergency Mode
and Normal Mode power/current output of this LED driver.
2. This is to ensure that this product will not produce more power/current in either modes than
the LED load can handle, thus ensuring that the LED load will not be damaged when the
system is operating.
3. The Normal and Emergency Mode output current can be programmed in a given range that is
dependent on the model type. Please refer to the product specification for the exact range. For
more information on programming instructions, please refer to www.osram.us
4. The emergency mode power should be less than or equal to rating of the driver and the
battery pack that is being used for the application.
5. Verify that the forward voltage of the luminaire’s LED array is within the limits of the
emergency LED driver and its programmed settings. The forward voltage of the LED array is

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commonly designated as Vfand should be found on the luminaire markings, in the luminaire
specifications, or imprinted directly on the LED arrays. If multiple LED arrays are to be driven,
verify that the total forward voltage is within the limits of this product. Using a voltage meter, it
may be possible to directly measure the voltage across the LED arrays when operating from
the emergency driver.
6. Ensure there will be sufficient light output in the end application. Estimate the egress lighting
illumination levels by doing the following:
a. Find the efficacy of the LED load. This can be given by the luminaire manufacture. This
number will be given in lumens per watt (lm/w). It is the installer’s responsibility to
validate the luminaire manufacturer’s efficacy data. This can be accomplished by direct
measurement, by review of independent 3rd party test data (UL, ETL, etc.), accessing
a public database of 3rd party data (such as Design Lights Consortium,
www.designlights.org), or other comparable means.
b. Lumens can be calculated by multiplying the emergency mode power of the LED driver
by the efficacy of the LED load. In many cases the actual lumen output in emergency
mode will be greater than this calculation gives, however it will provide a good estimate
for beginning the lighting design of the system.
c. Using the results of this calculation and industry standard lighting design tools,
calculate the anticipated illumination levels in the path of egress.
Lumens in
Emergency Mode
= Fixture Efficacy * Emergency Mode power of the product
Lumens in
Emergency Mode
= Fixture Efficacy *
Emergency Mode
Output current
* LED Load Vf
(Lumens) = __________ (lm/W) * __________ (A) * __________ (V)
NOTE: This product has been designed to reliably interface with a wide selection of LED modules and
is electrically compatible with every simple LED array that meets criteria 1 and 5 above. However,
compatibility cannot be guaranteed with all current and future LED systems. Compatibility testing of
the end-use system is suggested. Please contact the factory with any questions.
NOTE: After installation, it will be necessary to measure the egress lighting illumination levels to
ensure it complies with national, state, and local code requirements.
Installation of this emergency LED driver will vary based on the luminaire type, however, generally
follow these steps:
STEP 1: INSTALLING EMERGENCY DRIVER
Disconnect AC power from the LED luminaire.
Mount the emergency LED driver along with the battery pack(s) by the mounting tabs. The
luminaire’s installation instructions may provide guidance on the recommended mounting
location.
Emergency driver & battery pack assembly (battery, wires & fuse) must be completely installed
inside of a UL 1598 / CSA C22.2 no. 250 (Listed Luminaire) enclosure, or a UL 924 / CSA
C22.2 no. 141 (Listed Emergency Lighting) enclosure. No open holes should be left within an
enclosure of wiring or electrical components.

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The emergency driver and the battery pack(s), including fuses, as a system may be remote
mounted from the luminaire, when installed within a UL 1598 / CSA C22.2 no. 250 (Listed
Luminaire) enclosure, or a UL 924 / CSA C22.2 no. 141 (Listed Emergency Lighting)
enclosure Please refer to the specification sheet for the maximum recommended remote
mounting distance. Remote mount wiring must be in accordance with the National Electrical
Code/Canadian Electrical Code and with local installation requirements.
STEP 2: INSTALLING THE TEST SWITCH ON FIXTURE SURFACE
Mount the supplied 3-wire illuminated test switch in a location that is visible and accessible by
maintenance personnel.
The switch mounts through a mounting hole which may need to be made in the luminaire or
could come pre-punched by the luminaire supplier. Please refer figure 2 for mounting hole
dimensions.
Wire the test switch per wiring diagrams provided on these instructions.
After installing, mark with the "PUSH TO TEST" and "CHARGING INDICATOR LIGHT" labels.
STEP 3: WIRING THE EMERGENCY DRIVER
Select the appropriate wiring diagram to connect the emergency driver to the LED load. The
battery packs have a pre-installed push-in connector that fit on the matching terminal on the
driver.
Ensure separation of circuits that operate at different potentials.
Make sure all connections are in accordance with the National Electrical Code/Canadian
Electrical Code and any local regulations.
After installation is complete, connect the battery pack to the driver, place fuse in fuse holder
and then apply AC input power to driver (battery assemblies are provided with a max. 3A rated
blade type fuse).The charging indicator light should illuminate indicating the battery is
charging.
Allow 24 hrs charge time before operating in emergency mode.
A short-term discharge test may be conducted after the emergency driver has been charged
for one hour. Charge for 24 hours before conducting a long-term discharge test.
In a readily visible location, attach the label "CAUTION - This unit has more than one power
connection point. To reduce the risk of electric shock, disconnect both the branch circuit-
breakers or fuses and emergency power supplies before servicing."
NOTE: The Switched and Un-switched hot should be fed from the same branch circuit.

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Figure 3: Wiring diagram for non-switched line
Figure 4: Wiring diagram for switched line

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Maintenance
Although no routine maintenance is required to keep the driver functional, it should be checked
periodically to ensure that it is working. The following schedule is recommended:
1. Visually inspect the charging indicator light monthly. It should be illuminated. If the charging
indicator is flashing, please refer to the troubleshooting guide section.
2. Test the emergency operation of the fixture at 30-day intervals for a minimum of 30 seconds.
The LED load should operate at reduced illumination.
3. Conduct a 90-minute discharge test once a year. The LED load should operate at reduced
illumination for at least 90 minutes.
CAUTION:To replace fuse, disconnect AC power for both switched &
unswitched lines from the fixture. Replace fuse in the fuse holder. Output light
should turn on in Emergency Mode. Supply AC power to fixture. Output light will
change to Normal Mode. Illuminated Test Switch indicator light should be
illuminated. Contact manufacturer for fuse replacement.
Troubleshooting Guide
The below table provides the different indicators and their corresponding translation in terms of status
of the Emergency driver.
STATUS INDICATOR PROBLEM CORRECTIVE ACTION
Light ON, not flashing None None, unit is operating correctly.
Flashing 1 time in 20
seconds Battery not
connected
Ensure the battery connector is
engaged properly to the emergency
driver. Check battery wiring and battery
pack fuse.
Flashing 2 times in 20
seconds Battery Low
Charge the battery for one hour. If fault
persist, check battery wiring and
connections.
Flashing 3 times in 20
seconds Charging Error
Ensure AC input wiring and battery wiring is correct.
OSRAM SYLVANIA Inc.
200 Ballardvale Street
Wilmington, MA 01887 USA
1-877-636-5267
www.osram.us/ds
ECS-351
OSRAM and OPTOTRONIC are registered trademarks of OSRAM GmbH.
Specifications subject to change without notice.
© 2018 OSRAM SYLVANIA Inc.