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August 24, 2016
HE1U-2548
High Efficiency 1U AC to DC Power Supply
Owners Guide
(These instructions are intended for use by a technician familiar with electronic products)
Autorange Input Voltage 90 to 264 VAC
DC-OK TTL Signal for each Module
Short Circuit / Overload / Over Voltage / Over
Temperature Protection
3 year warranty
DESCRIPTION
The HE1U-2548 is a Heavy Duty AC to DC 1400 Watt Power Supply in a 1U chassis. The HE1U-2548 comes with power
factor correction, and four layers of protection against overload, over voltage, over temperature, and short circuit. The HE1U-2548 has
DC-OK for each module connected to the rear terminal strips. The HE1U-2548 comes with a 3 year warranty.
SPECIFICATIONS
Output Voltage .......................................................................................................................................................................... 48 VDC
Output Voltage Tolerance .......................................................................................................................................................... +/- 1 %
Output Amperage ........................................................................................................................................................... 25 Amps max.
Maximum Power, continuous .............................................................................................................................................. 1400 Watts
Maximum Ripple and Noise ........................................................................................................................................ 150 mV p-p max
Input Voltage, Switch Selectable ............................................................................................................... 90 to 264 VAC Auto ranging
Input Frequency Range ........................................................................................................................................................... 47-63 Hz
Maximum AC Current ........................................................................................................... 16.4 Amps/115 VAC; 7.8 Amps/230 VAC
Typical Efficiency........................................................................................................................................................................... 92 %
Max Inrush Current, single cycle ........................................................................................... 25 Amps / 115 VAC, 40 Amps / 230VAC
Short Circuit Protection ................................................................................................................................. Constant Current Limiting
Overload Protection (operates) ................................................................................................................................. typical 105-125 %
Line Regulation ....................................................................................................................................................................... +/- 0.5 %
Load Regulation ...................................................................................................................................................................... +/- 0.5 %
Fan Control ................................................................................................................................... Heat sink temp >140 F (60 C) = ON
Over Temperature ........................................................................................................................ >195 F (90 C) auto output shutdown
Rise Time following ON ............................................................................................................................................................... 50 mS
Hold Time following OFF ............................................................................................................................................................. 16 mS
Working Temperature Range ............................................................................................................. -22 F to +158 F (-30 C to +70 C)
Storage Temperature ......................................................................................................................... -40 F to +185 F (-40 C to +85 C)
Withstand Voltage .................. 3 KVAC @ 10 ma (I/P-O/P)/1 min, 2 KVAC @ 10 ma (I/P-FG)/1 min, 500 V @ 10 ma (O/P-FG)/1 min
Dimensions ...................................................................................................................................................... 1.75
” H x 19” W x 14” D
Weight ......................................................................................................................................................................................... 11 lbs.
