1
LP-‐14
Desktop Power Supply
Owners Guide
(These instructions are intended for use by a technician familiar with electronic products)
•
Filtered and regulated
•
Redundant temperature protection
•
Overload protection
•
Over voltage protection
•
UL Recognized
•
ISO 9001
•
3 year warranty
DESCRIPTION
The DuraComm LP Series of power supplies are UL recognized. They are manufactured in accordance with ISO 9001 quality
assurance standards. These power supplies convert 120 or 240 volt 50/60 Hz AC power to low noise and ripple, regulated 13.8 volt DC
output. (Note: units are factory pre-set for 120 AC input. Conversion for 240 volt AC input requires an internal adjustment by removing a
“jumper wire” on the circuit board. This should only be done by a qualified technician or should be specified at the time of purchase.)
DuraComm’s power supplies are protected against inadvertent shorts and overloads by an electronic output current limiting
circuit. This current limiting circuit reduces the output limiting to a very low and safe value until the overload is removed from the power
supply. As soon as the overload is removed, the output will be automatically restored.
Additionally the power supplies incorporate an over temperature feature to protect against undesired component failure should
operation in excessive environmental temperatures occur. Units exceeding 15 amps surge output are equipped with cooling fans.
When these supplies (Model LP-18 and LP-25) are lightly loaded and cool, the fan will not run. When demand on the power
supply increases and the internal temperature reaches 40
°
C, the fan will begin to run until the temperature drops below this threshold.
DuraComm LP series power supplies are compatible with all LPH radio hoods.
DuraComm LP series power supplies may be configured for battery back up & charging applications with the addition of the LPBC-25.
See
www.duracomm.com
for more information.
SPECIFICATIONS
AC Input Voltage .............................................................................100 ~ 130 VAC (pre-set), 200 ~260 VAC (take off internal jumpter J7)
Output Voltage ..............................................................................................................................13.8 VDC (pre-set_ 12-15V Adj By. VR1)
Output Ripple ....................................................................................................................................................... 150 mV or less @ full load
Current at 20C ...................................................................................................................................................................... Surge 14 Amps
Continuous amps .............................................................................................................................................................................11 Amps
Duty Cycle .....................................................................................................................................................................Continuous = 100%
Overload ..................................................................................................................................Fold back limited @ 120% maximum output
Over Voltage .............................................................................................................................................................. 16.5 VDC, auto re-set
Over Temperature ....................................................................................................................... Typical internal sensor point 70C (156 F)
Load Regulation...................................................................................................................................................... 0.5% No load to full load
