Application Data

Examples of Power Management by Model 695 in a Toyota Land Cruiser SUV
Example Alternator Amps Needed for Available Alternator Amps Available 27V Output Amps Model 695 Max. Output Amps
Rating Vehicle Consumption For Model 695 Model 695 (Alternator Contribution)
*
Recommended setting
1 80A 30A 50A 22.7 Amps 20 Amps (CB1 turned on)
2 120A 30A 90A 40.9 Amps 40 Amps (CB1 & CB2 turned on)
3 120A 30A 90A 40.9 Amps 55 Amps (CB1,CB2 & CB3 turned on)
Example #1
For a required continous run time of 2 hours, a 40A/24V jammer will operate with a 40 A-Hr.,
24V Battery Bank. 20A will be supplied continuously by the Model 695 and 20A will be
supplemented by the battery bank. Two conventional 45 AHr lead acid batteries connected
in series will accomplish these results.
For a required run time of 4 hours with the same jammer an 80AHr battery bank would be
needed. The 695 would supply 20A continously and 20A would be supplemented by
the battery bank.
Example #2
With 40A contiuously available from the 695, two conventional 45 Ahr lead acid batteries
would be adequate to operate the equipment indefinitely.
Example #3
For a jammer requiring 60A, the model 695 will supply 40A, while the 40 Ahr., 24V battery bank will furnish the additional 20A. This condition will last for 2 hours until the
24V battery bank is depleted at which time the Model 695 will take over, providing all of the jammer power. This will cause to be drawn 162A
**
from the totality of the
SUV's 12V electrical system - 42A more than its alternator capacity. This will impose a 42A discharge rate on the SUV's 12V ignition battery until the 695's low input
voltage cutout of 11.5 VDC is reached. At this point the 695 will turn off and cease supplying 24V power to its output and protect the ignition battery from further discharge.
*
Maximum Available 27V Output Current from Model 695 (Alternator Contribution) = (Available Alternator Current) divided by 2.2
**
Jammer Current Demand of 60A at 24 VDC through Model 695 translates into (60 x 2.2) = 132A at 12V and added is 30A consumed by the SUV
General Specification-Model 695 DC-DC Converter
Electrical Specifications:
Output Voltage: 26.4 Nominal (Internally adjustable +,- 0.5V)
Output Voltage Adjust Range 24.5 VDC to 28.0 VDC (internally adjustable, consult owner’s manual)
Continuous Max Load Amps: 55 ADC @ 40C ambient (Input 26.4)
40 ADC @ 60C ambient
Efficiency: 91% @ Full Load (55A, 26.4 VDC out)
Maximum Input Current: 125 A (12 VDC in)
Overload Protection: Electronically current limited (primary protection)
Circuit Breakers at the Input (secondary protection)
Cooling: Convection or Forced Air
Thermostat Controlled Fan
Output Ripple Voltage: 10 mV RMS (20C to 75C)
50 mV RMS (-30C)
Input Voltage Range: 11 VDC to 15 VDC
Input Output Isolation: Input and Output returns are common
Low Voltage Cutout Circuit:
Low Voltage cutout point: Adjustable from 10.5 VDC to 13 VDC
(internally adjustable, consult owner’s manual)
Low Voltage Cutout Hysteresis: 1.2 VDC @ 13.0 V/ 0.9 VDC @ 10.5 VDC
Activation Circuits:
1) Model 695 may be activated through the command terminal #1 of terminal block TBA which when connected to +12 VDC
of the vehicle will turn on the converter.
2) Model 695 may be turned on in sections by using the circuit breakers on the front panel.
Environmental:
Ambient Operating Temperature: -30C to + 60C
Maximum Humidy: 90% non condensing
Maximum Elevation: 6000 meters above sea level
Mechanical Specifications:
Dimensions: 17.0 L x 7.0W x 3.5 H (inches overall maximum)
Shipping Weight: 15 lb.
Construction: Aluminum housing with painted steel wrap around
Mounting Method: #12 Hardware via front and rear mounting flanges
Mounting Centers: 16.5 x 3.87 (inches)
Hook Up: 3 Position Splicer Terminal Blocks
Manufactured in the U.S.A. by: SEC America, LLC P.O. Box 2266, 81 Ethan Allen Drive, S. Burlington, VT 05403
Tel: [phone] • Fax: [phone] email: [e-mail] • Internet: www.secamerica.com
© July 2009 Printed in USA
CB1 CB2 CB3
CB1 CB2 CB3
(CB1, CB2 & CB3 are turned on when depressed)