Technical Specifications

850W
Model 728HS
Isolated Sealed DC-DC Converter
Design Features
- Wide Range Input Voltage
- High Efficiency Design
- Hi Ingress Rating, IP 676
- Adjustable Output Voltage
- Optional Remote Output Voltage Sensing
- Optional Remote On/Off switching
- Low Voltage cutout
- High Voltage cutout
- Electronically Current Limited
- Thermally Protected
- Low No Load Power Consumption
- I/O Bayonet Quick Connection
MODEL NO.
728 HS
NOMINAL INPUT VOLTAGE RANGE 12 VDC to 28 VDC
INPUT CURRENT AT 32A OUTPUT CURRENT 76A @ 11.5 Vin; 25.5 Vout
< 160 mA over entire input and output ranges
OUTPUT VOLTAGE NOMINAL 26.0 VDC (factory adjusted)
OUTPUT VOLTAGE ADJUSTMENT RANGE 16.0 VDC to 28.0 VDC (internally accessible to user)
250 mV (without remote sensing)
50 mV (with remote sensing)
OUTPUT RIPPLE 50 mV RMS at maximum load (measured at 25C)
POWER SURGE 1000 W
MAXIMUM LOAD CURRENT 32 ADC, for output voltage setting 16.0 VDC - 28.0 VDC
EFFICIENCY Not less than 90% over entire operating range
HIGH INPUT VOLTAGE SHUTDOWN > 32.0 +/- 1.0 VDC
Set to shut off at 110% of maximum current
OVER TEMPERATURE SHUTDOWN Via internal thermostat, self resetting
By conduction through base plate and convection
FUSING Customer accessible by front panel removal
Via 2 pins on the output connector
usage is optional
OPERATING HUMIDITY 100%
MOUNTING SLOT CENTERS (in./cm.) 10.0 x 7.3 / 25.4 x 18.5
HOUSING MATERIAL All Aluminum
WEIGHT, (lb./kg.) 12 /5.5
NOTE: Specifications are subject to change without notice. Rev 7/15/2019
10.5 to 32.0 (+,- 0.5) VDC
INPUT CURRENT AT NO LOAD
OUTPUT VOLTAGE REGULATION < 0.2%
GENERAL
OVERLOAD SHUTDOWN
INPUT
CONNECTIONS
OUTPUT LOAD REGULATION
REMOTE SENSE
REMOTE TURN ON
PROTECTION
OUTPUT
MAXIMUM INPUT VOLTAGE RANGE
INGRESS RATING
DIMENSIONS, (in./cm.) (L x W x H) 15.5 x 8.0 x 2.9 / 39.4 x 20.3 x 7.4
IP 676
MAXIMUM CONTINUOUS OUTPUT POWER 850 W
LOW INPUT VOLTAGE SHUTDOWN < 10.5 +/-0.3 VDC
COOLING
Via 9 pin Bayonet connectorINPUT/ OUTPUT CONNECTION
Via pin to -ve on input connector,
may be disabled via internal jumper
with continuous automatic retry
OPERATING TEMPERATURE RANGE -40C to 70C, 100% loading
SEC America Corp.
SECAmericaCorp. www.secamerica.com 1(802)8658388[e-mail]