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2.5.
Detailed Connection Diagram
Power Input
J5
Gnd:
Vin:
Acc:
F1
Input Fuse:
Power Output
J8
ATX12V:
J7
ATXPWR:
J1
FAN:
Control
JP1
Pins G1, G2:
Pins F1, F2:
Pins E1, E2:
Pins D1, D2:
Pins C1, C2:
Pins B1, B2:
Pins A1, A2:
P1*
Countdown Adj: In Basic Mode, clockwise rotation adds time to the Countdown Timer (0-20m)
P2*
Low Voltage Adj: In Basic Mode, clockwise rotation raises the low voltage threshold (10V-12V)
D8
LED indicator:
J2
Serial Port:
*Note: Do Not Over-Turn P1 and P2, only 270 degrees is available
2.6.
Bench Testing
The DSATX can be tested in the lab before being installed into the vehicle. Certain details need to be
noted for proper bench testing. When connecting bench power use between 12 to 16 volts DC to Vin and
Gnd terminals for best results. Small jumper wires may be sufficient to turn on the DSATX alone; however
they will most likely not be adequate to run a computer. For the DSATX to turn on successfully, the bench
supply must be able to provide 2 amps of inrush current. Under full rated load the DSATX draws around
18 amps @ 12V input. 12-volt bench top power supplies capable of delivering this kind of load are
expensive and uncommon. Using 12 gauge or heavier wire will provide the best results. It is OK run a
jumper wire from VIN to ACC for bench testing and certain installations.
To aid in bench testing, a Shorting Jumper at location JP1 pins B1 and B2 will enable Dumb Power Supply
Mode. This will bypass the Startup/Shutdown sequencing and battery protection. ACC is not required and
the LED will indicate that the DSATX is providing power on all the output rails.
The best way to do successful bench testing is to use an adequately sized 12V battery. Bringing in the
battery from the car or using an extra one that has at least a 12-AmpHour capacity will be sufficient in
most cases. Do not connect a Car Battery Charger directly to the DSATX.
DSATX Manual
J1
JP1
P1
P2
J2
D8
Ground Input, connect to the chassis or the (–) battery terminal
+12 Volts Input, connect directly to the (+) battery terminal
Accessory Input, Connect to a switched +12 volt supply wire (ignition or fuse box)
20-Amp mini-automotive fuse (yellow)
Connect to the 4-pin processor power connector on the motherboard
Connect to the 20-pin motherboard power connector and peripherals
Connects to a 12 Volt 3-pin fan to cool the DSATX
Connects to Motherboard Power Switch Header (G2=Signal Output, G1=Gnd)
Aux Connection (for Amp Enable or Slave Power Supply)
SL_SEN (RESERVED)
User Switch (will zero countdown timer when shorted)
User1 (RESERVED)
User0 (Shorting Jumper here enables Dumb PSU Mode)
A1=+5V, A2=nReset (RESERVED)
Indicates Operation, Timer States, and Faults
Enables Advanced Modes, field upgrades, and diagnostics
Copyright 2006 Mpegbox.com
J8
J5
F1
J7
Page 4 of 13
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