Philips DSATX 220 Detailed Connection Diagram, Bench Testing, Power Input, Power Output, Control

2.5.Detailed Connection Diagram

	J1
	J8
JP1
P1	J5

	F1
P2
J2
D8	J7

Power Input
J5	Gnd:	Ground Input, connect to the chassis or the (–) battery terminal
	Vin:	+12 Volts Input, connect directly to the (+) battery terminal
	Acc:	Accessory Input, Connect to a switched +12 volt supply wire (ignition or fuse box)
F1	Input Fuse:	20-Amp mini-automotive fuse (yellow)
Power Output
J8	ATX12V:	Connect to the 4-pin processor power connector on the motherboard
J7	ATXPWR:	Connect to the 20-pin motherboard power connector and peripherals
J1	FAN:	Connects to a 12 Volt 3-pin fan to cool the DSATX
Control
JP1	Pins G1, G2:	Connects to Motherboard Power Switch Header (G2=Signal Output, G1=Gnd)
	Pins F1, F2:	Aux Connection (for Amp Enable or Slave Power Supply)
	Pins E1, E2:	SL_SEN (RESERVED)
	Pins D1, D2:	User Switch (will zero countdown timer when shorted)
	Pins C1, C2:	User1 (RESERVED)
	Pins B1, B2:	User0 (Shorting Jumper here enables Dumb PSU Mode)
	Pins A1, A2:	A1=+5V, A2=nReset (RESERVED)
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:	Indicates Operation, Timer States, and Faults
J2	Serial Port:	Enables Advanced Modes, field upgrades, and diagnostics

*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.

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