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LEMD Series
Installation Instructions
Checklist Before Installation
This product is suitable for field installation with suitable LED loads including LED luminaires, DC voltage driven LED
replacements for fluorescent lamps and others. To determine if your luminaire is eligible for field installation, please
check the 4 items in the following checklist.
1. Verify the LED load's rated power is greater than or equal to the power output of this emergency LED driver. This
is to ensure that this emergency product will not produce more power than the LED load can handle, thus ensuring
that the LED load will not be damaged when the system is in the emergency mode.
2. Ensure that the forward voltage of the luminaire's LED array is within the limits of this emergency LED driver. The
forward voltage of the LED array is commonly designated as Vf and 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 AC driver.
3. Ensure the output current of the LED driver does not exceed 5.0 Amps. This is the current into the red wire.
4.
Calculate the end use application's emergency illumination levels. You can estimate the egress lighting illumination
by doing the following:
A. Find the efficacy of the LED load, which will be found in the Design Lights Consortium database. 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 output power of the emergency 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.
(Fig. 1)
C. Using the results of this calculation and industry standard lighting design tools, calculate the anticipated
illumination levels in the path of egress.
NOTE:
This product has been designed to reliably interface with a wide selection of LED loads and is electrically
compatible with every simple LED array that meets criteria 1 and 2 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.
After installation, it is necessary to measure the egress lighting illumination levels to ensure it complies with
national, state, and local code requirements. Typically 1 fc on the ground along the full means of egress.
10070337 P1 - 11/23
Fig. 1
2
800-533-3948 www.barronltg.com
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