bor when the product is
returned postage paid as a complete unit to LIND. Proof of
purchase and a letter explaining the problem must
accompany the returned unit.
This warranty does not apply if any part of the timer, its
cables or connection jacks have been altered, subjected to
abuse, accident or misuse. This warranty excludes incidental
or consequential damage resulting from the product or the
use of the product. This warranty is in lieu of all other
warranties expressed or implied and no person is authorized
to assume for LIND any other liability in conjunction with
this product. The warranty gives you, the purchaser, specific
legal rights and you may have other rights which may vary
from state to state and country to country.
The LIND product you are purchasing has not been designed
for, or certified for use in, life support applications. Any
such use is at your own risk. LIND ELECTRONICS, INC.
HEREBY EXPRESSLY DISCLAIMS ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. Lind
Electronics, Inc. will not be liable for any claims, awards,
damages or other liability arising out of the use of LIND
products for life support applications whether in the nature
of direct, indirect, consequential, special or punitive
damages.
SUPSL-F00040 Rev 4 10/06
The 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.
Adj. shut down delay time: (0 sec. to 4 hrs), (5 sec. to 2 hrs),
(12 min. to 18 hrs) depending on SDT model selected.
Low voltage shutdown at 10.5 (21) VDC
High voltage shut down at 18 (36) VDC with auto reset.
Loads up to 30 (20) amps at 12 (24) VDC. Two output
connections (optionally fused at 15 amps each).
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).
Optional alarm output if ignition option is not used.
Consult Lind for alarm options.
LED indicators for ON, OFF and Timing.
Speed-up time test switch (set delay divided by 100).
Override switch for 12 minute emergency operation after
time out or failure of the engine to start.
Protected against automotive load dump.
Operating temperature -50 to 75 C.
Lind, Lind Electronics, and the Lind Logo are Trademarks of Lind Electronics, Inc.
All other Registered Trademarks and Trademark names are the property of their respective owners.
© 2006 Lind Electronics, Inc.
6414 Cambridge St., Minneapolis, MN 55426 USA
Tel: (952) 927-6303 Fax: (952) 927-7740
LIND
LIND Electronics, Inc.
E-mail: Lrlind@lindelectronics.com
Internet: www.lindelectronics.com
Shut Down Timer
Vehicle Battery Protection Unit
(Screw Terminal Output)
(Terminal Block Output)
*Shown with Optional Fuses
Specifications are listed for 12 VDC input systems
Specifications are in parenthesis for (24 VDC input systems) Description of the Shut Down Timer (SDT)
The SDT protects the automobile battery from over discharge by
shutting OFF up to 30 (20)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 fail-
ure 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 se-
quence is started.
A unique feature of the Lind SDT is that it allows full testing of
the system after installation. Momentary closure of the test switch
reduces the delay time by a factor of 100 to allow a quick test of the
system timing function.
Timer start
The timer contacts will close when the engine is started and the
alternator is charging the battery (battery voltage exceeds 13.5 (27)
volts). SDT timing will start when the engine is turned OFF and the
battery voltage decreases to below 13 (26) volts.
Optional connection of the IGN terminal will result in the timer
starting when the ignition switch is opened. Note - If the IGN termi-
nal is connected to the accessories position of the ignition switch,
the loads will be energized with the key in the accessories position.
Timer Setting
The SDT ON time after engine shut OFF is set with the potenti-
ometer on the top of the SDT unit. A small screwdriver or key can be
used to set the potentiometer.
SHUT DOWN TIMER SPECIFICATIONS
Battery Voltage Sensing turn-on threshold:
>13.5(27) V
Battery Voltage Sensing timer start threshold:
<13.0(26) V
Ignition On threshold (if used):
>5(10)Volts
Ignition Off threshold(if used):
<2.5 (5)Volts
LED Flash rate in timing mode:
Normal timing:
2 seconds
Test Mode timing:
0.5 seconds
High Battery Voltage disconnect threshold:
>18(36)Volts
Low Battery Voltage disconnect threshold:
<10.5(21) V
Low Battery Voltage disconnect delay:
>10 seconds
Input voltage range:
9-18(18-36) V
Maximum load: (Two output connections):
30A{15A ea.}
(20A{10A ea.}
Current draw in OFF mode:
18 mA
Current draw in ON/TIMING mode:
95 mA
Time Delay adjustment range:
(0 sec. - 4 hrs.)
(model dependent)
(5 sec.-2 hrs.)
(12 min.-18 hrs.)
Over-ride Mode time setting:
12 minutes
(over-rides
time adj. setting)
Test Mode speed up rate:
x 100
Operating temperature
-50 to 75 C
Operation
The Shut Down Timer (SDT) is intended to shut down electrical
equipment at a preset delay time after the automobile engine is
turned OFF. This protects the battery and the equipment from dam-
age due to over discharge or low input voltage.
Installation
Mount the SDT in a cool, dry place. An optional splashproof
version is available to allow use of the timer in the vehicle engine
compartment. The SDT is connected between the +12 volt of the
vehicle electrical system and the loads to be controlled. The loads
may be radios and computers or other electrical loads (lights and
flashers).
The SDT terminal marked +BAT must be connected to the sys-
tem +12 volts through a suitable fuse, using appropriately sized
wire. Better protection is provided if multiple loads are fused indi-
vidually between the SDT and the load.
Note - On some models, each output connection can be protected
by a fuse rated at 15 amps max.
Loads are connected to either or both of the +OUT terminals.
On models with the high current terminal block, strip back the
wire .35 prior to insertion. Use #10 spade lugs on the screw termi-
nal models.
Connect the GND terminal to a good chassis ground. The SDT
is powered from the +BAT input and this ground.
Activation of the SDT timing period may be automatic by sensing
the battery voltage drop when the engine is turned OFF or by the
optional IGN connection to the ignition switch.
For the ignition switch activation option, connect the IGN termi-
nal of the SDT to the ignition switch terminal that goes to zero volts
when the engine is turned OFF.
The GND and IGN connections carry very little current (< .1
amp). Wire gauge is determined by mechanical suitability. Strip
back wires .25 prior to installation.
Note - When using the ignition switch option, the SDT period will
not start if the engine dies.
INSTALLATION
Set up
The shut down delay time is set with the Time Delay Potentiom-
eter on the face of the SDT. Point the arrow on the potentiometer
to the desired delay.
To Test
With the engine running the Green LED will be ON and power
is applied to the loads.
Turn the engine OFF and the Green LED will flash at a 2
second rate to indicate normal timing.
Momentarily close the Test Switch. The Green LED will flash
rapidly indicating fast test timing. Shut down will occur in 1/100
of the normal time set. With a 1 hour setting the SDT will time
out in 36 seconds. The Red LED will come ON when the outputs
turn OFF.
Momentarily close the Over-ride Switch. The Green LED will
flash at the normal rate indicating normal timing in OVER-RIDE
mode. The over-ride switch will provide 12 minutes of additional
operation after the normal time period has been completed even
with battery voltage lower than 10.5 (21)volts. The over-ride
switch does not work if the output is already on.
Momentarily close the Test Switch. The Green LED will blink
rapidly indicating fast test timing. Shut down will occur in about
8 seconds. The Red LED will come ON.
-----------------------------------------------------------------------------
Notes
1. The SDT outputs will turn ON if the automobile battery is
charged from an external source. The output loads should be
turned OFF when externally charging.
2. The low voltage detection circuit has a 10 second delay to
avoid load disconnection when starting the automobile.
Test Switch
Over-ride Switch
On/Timing LED
Off LED
+12 (+24)VDC In Terminal
Adj. Time Potentiometer
Output Fuses
(Optional)
Output Terminals
+OUT
+OUT
+BAT
GND
IGN
FUSE - 30AMP MAX.
TO
+BATTERY
TO LOADS
TO LOADS
TO VEHICLE GROUND
TO IGNITION SWITCH
(OPTIONAL)

LIND
Shut Down Timer
Mounting holes
4