The Tridonic EM 21/28/49-5 T5 Basic is an emergency lighting supply unit for T5 fluorescent lamps. The Tridonic EM 21/28/49-5 T5 Basic can be used for 21, 28 or 49 Watt T5 fluorescent lamps. - 1 or 3 hour rated duration - Low profile casing - Selectable operating time - 5 pole technology 4 pole lamp changeover and delyaed power switching to the ballast - High frequency AC operation of the lamp - Hot restart in emergency mode - Gentle on the lamp - Green charge status LED - Electronically control battery charging - Polarity reversal protection for battery - Rest mode function - Short circuit proof battery connection
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