LIND DC Power Adapters Operating Instructions Manual page 111

Lind Low Profile Shut Down Timer
• Settable shut down delay time from 5 seconds to 4 hours. (Consult factory other delay options)
• Low voltage shut down at 10.5 VDC.
• High voltage shut down at 18 VDC with auto reset.
• Loads up to 30 amps.
• Reverse polarity protected.
• Automatic activation by sensing the battery voltage. (battery not charging = timer ON).
• Optional activation by ignition switch connection. (ignition OFF = timer ON).
• LED indicators for ON, OFF and Timing.
• Speed-up time test switch (set delay divided by 100).
• Over-ride switch for 12 minute emergency operation after time out or failure of the engine to start.
• Protected against automotive load dump.
Description of the Shut Down Timer (SDT)
The SDT protects the automobile battery from over discharge by shutting OFF up to 30 amp loads
at a preset time after the engine is shut down or when the battery is discharged to a low voltage level.
The SDT also protects radio or computer equipment from damage due to low or high input voltage
as experienced with alternator failure or improper voltage jump-starts.
An emergency switch allows 12 minutes of operation after the SDT shuts down the equipment.
An ignition switch input is provided as an optional activation method but is not necessary. The SDT
is normally activated by sensing the alternator charge voltage level applied to the battery. When the
alternator goes OFF the timed sequence is started.
A unique feature of the SDT is that it allows full testing of the system after installation. Momen-
tary closure of the test switch reduces the delay time by a factor of 100 to allow a quick test of the
system timing function.
Vehicle Battery Protection Unit
Features
This Shut Down Timer protects your
vehicle battery from over discharge,
and protects communications and other
sensitive equipment from low voltage
and high voltage damage. This device
turns OFF electrical loads a preset time
after the car engine is shut down. The
timer starts when the ignition is turned
OFF.