DuraWatt DSATX
220-Watt DC-DC ATX Power Supply
User Manual
Version 1.0
Table of Contents
1.
Getting Started ...............................................................................................................................1
1.1. Introduction....................................................................................................................................1
1.2.
1.3.
1.4.
2.1.
2.2.
2.3.
2.4.
2.5.
2.6.
2.7.
Product Photo.........................................................................................................................2
Block Diagram.........................................................................................................................2
Included Contents and Optional Accessories............................................................................2
Recommended Additional Supplies..........................................................................................3
Recommended Tools...............................................................................................................3
Connection Overview Diagram.................................................................................................3
Precautions and Warnings.......................................................................................................3
Detailed Connection Diagram ..................................................................................................4
Bench Testing.........................................................................................................................4
Quick Installation Steps ...........................................................................................................5
3.
4.
User Guide......................................................................................................................................5
3.1.
Theory of Operation.................................................................................................................5
Modes of Operation.................................................................................................................5
LED Codes .............................................................................................................................6
Basic Mode Timing Diagram....................................................................................................6
Features Explained..................................................................................................................6
3.2.
3.3.
3.4.
3.5.
Serial Port Connectivity..................................................................................................................8
4.1.
Serial Port Adapters ................................................................................................................8
Serial Port Overview................................................................................................................8
Basic Programming Control .....................................................................................................8
Diagnostic Feed ......................................................................................................................8
Extended Basic Programming Examples..................................................................................9
Advanced Features ...............................................................................................................10
Advanced Feature Tables......................................................................................................10
4.2.
4.3.
4.4.
4.5.
4.6.
4.7.
5.
7.
Specifications...............................................................................................................................11
5.1.
Electrical ...............................................................................................................................11
Mechanical............................................................................................................................11
Connector Pin Locations........................................................................................................12
5.2.
5.3.
Mpegbox.com Limited Warranty ..................................................................................................13
1. Getting Started
1.1.
Introduction
Thank you for purchasing a DSATX 220 Watt Automotive Power Supply. Please take some time to read
through this manual before attempting to use this product.
The DSATX is the most advanced DC-DC Automotive Computer Power Supply available. It is capable of
properly powering most Pentium 4 and AMD based computers in a motor vehicle as well as their accessories.
Its advanced microprocessor control enables features such as Startup/Shutdown Sequencing, Low Voltage
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2. Installation Guide
2.1.
Recommended Additional Supplies
·
·
·
·
·
·
12 AWG Hookup Wire for Vin and Gnd Inputs (Minimum Recommended Gauge)
12-24 AWG Hookup Wire for Acc Input (Very little current flows through this wire)
Mounting Screws (4-40 or 6-32)
Mounting Standoffs (Optional)
Power Supply Cooling Fan (or assure adequate airflow over the DSATX)
Custom Enclosure
2.2.
Recommended Tools
Soldering Iron and or Crimp Tool (Secure Input Power Connections)
Philips Jewelers Screwdrivers (for P1 P2 Adjustment Pots)
Philips Head Screwdriver (for Mounting Screws and J5 Terminal Screws)
·
·
·
2.3.
Connection Overview Diagram
DSATX 220W DC-DC POWER SUPPLY
Hard Drive
J5
GND
CD-ROM, etc.
PSON#
PWROK
+5VSB
+5V
+3.3V
-12V
+12V
DC-DC
Power
Supply
Supply
Protection
Computer
Motherboard
ATX
20-pin
VIN
J7
ACC
Temp.
Sensor
P4
4-pin
Control
Monitoring
J8
J1
Adjust
POTs
Translator
J2
Microcontroller
JP1
Status
LED
Serial Diagnostics
and Control
Power
Supply Fan
MB Power Switch
2.4.
Precautions and Warnings
Operating a personal computer in a motor vehicle can be dangerous. Improper use or negligence can
result in damage and or loss of life to self and others. Safety precautions must be considered when
operating a personal computer in a motor vehicle. Displays must not be distracting to the driver and should
not display motion video or otherwise distracting content. Check with the local government in your area for
laws and guidelines regarding the use of potentially distracting electronic devices in motor vehicles.
Mpegbox.com and the people responsible for its content shall not be held responsible for loss or damage
as a result of the content, procedures, or the use of the product/s outlined in this manual. A personal
computer used in a motor vehicle should only be operated as a personal computer when then vehicle is
not moving. Use this product at your own risk. Various safety features are built into this product and any
attempt to override them will void any warranties and may cause increased risk of damage to persons or
property.
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2.5.
Detailed Connection Diagram
J1
J8
JP1
P1
P2
J2
J5
F1
D8
J7
Power Input
J5
Gnd:
Vin:
Acc:
Input Fuse:
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)
F1
Power Output
J8
J7
J1
ATX12V:
ATXPWR:
FAN:
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
Control
JP1
Pins G1, G2:
Pins F1, F2:
Pins E1, E2:
Pins D1, D2:
Pins C1, C2:
Pins B1, B2:
Pins A1, A2:
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)
P1*
P2*
D8
J2
Countdown Adj: In Basic Mode, clockwise rotation adds time to the Countdown Timer (0-20m)
Low Voltage Adj: In Basic Mode, clockwise rotation raises the low voltage threshold (10V-12V)
LED indicator:
Serial Port:
Indicates Operation, Timer States, and Faults
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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Using the 12 volt output of an ATX AC-DC power supply is also a method for successful bench testing. By
shorting the Green Wire (PS_ON) of an ATX AC-DC power supply can provide the required current for
certain bench testing applications. Make sure minimum load requirements (on the AC-DC power supply)
are met if going this route.
2.7.
Quick Installation Steps
·
·
Connect GND, and VIN with heavy gauge wire directly to the automotive batteries + and - terminals.
GND may also be connected with heavy gauge wire to the Chassis if desired.
Connect the ATX Power Connector (J7/J8) to the Motherboard and any peripherals to the Molex
Connectors.
·
·
Connect a case fan with standard 3-pin connector to J1 FAN (or assure adequate air flow).
Connect the ACC line to a switched 12 volt connection in the car (or through a switch to a constant 12
volt battery connection). This connection does not need to be heavy gauge.
Connect a 2-pin jumper cable between location G at JP1 and the Motherboards "Power On" header.
This will allow the DSATX to turn on and off the motherboard by simulating a power button press
(POLARITY MATTERS HERE).
·
·
·
Set P1 to set the time before shutdown. Adjustable between 0-20 minutes by default in Basic Mode.
Set P2 jumper to set the low voltage cutout voltage. To minimize this feature, set it to 10 volts (fully
counter clockwise). P2 is adjustable between 10-12 volts.
·
Apply 12 volts to ACC by turning on the ignition or by flipping a switch and you’re ready to go!
3. User Guide
3.1. Theory of Operation
The basic idea of the DSATX is this: You want to put a computer in your car, but you don’t want to
worry about turning it on and off, you don’t want to worry about the temperature extremes, and you don’t
want to worry about the harsh automotive electrical environment. You also want to have the ability to go to
the gas station and have the computer still running while you pump and pay so when you come back you
don’t have to wait a boot-up. When you get home, you don’t want a dead battery. This power supply is the
only one on the market that allows you to do all these things and have full control of the settings.
The following example will illustrate some of the features of Basic Mode and how it applies to an
automotive install. The DSATX is installed as described above. The user steps into the automobile and
turns on the key. ACC goes HI (12 Volts) as a result and the DSATX wakes up from Sleep Mode. The LED
turns on and it sends a startup pulse to the motherboard over the 2-pin jumper connected at JP1 pins G1
and G2. The computer now boots and is up and the DSATX is in Running Mode playing Mp3s, doing GPS
Navigation, etc. The automobile goes to the gas station and the driver turns off the key and ACC goes
LOW. The DSATX now starts the Countdown Timer (Countdown Mode) and the LED starts flashing once
per second. The driver gets back in the car, starts the car and the computer keeps playing the MP3s
without a hiccup. The DSATX now is back to Running Mode with the LED full on. The user then drives
home and turns off the car for the night. ACC goes low and the countdown timer starts and then expires.
The DSATX then sends a pulse again over JP1 pins G1 and G2 to shutdown the computer. The shutdown
pulse was successful and the computer turned off. The DSATX then goes to sleep and preserves battery
power.
3.2.
Modes of Operation
Basic Mode: This is the factory default mode for the DSATX. In this mode the following options are
available:
·
·
P1 and P2 adjustment pots are the only adjustable settings
P1 adjusts the Countdown Timer, after ACC goes low the DSATX will wait between 0-20 minutes
(10 minutes by default, P1= 50%)
·
·
·
P2 adjusts the Low Voltage Cutout (10-12 Volts, 11 Volts Default, P2=50%)
No Serial Port Adapter is required
A switch connected at JP1 pins D1,D2 (User Switch) will allow a quick shutdown
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Extended Basic Mode: This mode requires a Serial Port Adapter (see optional accessories above) to
use. This mode is entered by typing an ‘E’ Character to enable the writing of parameters then a ‘P’ for
Programming extended basic features. In this mode all the Basic Mode features apply as well as:
·
·
·
P1 Countdown Timer range can be extended
P1 and P2 adjustment pots can be bypassed and their values Hard Coded
The VTURNON feature can be enabled allowing the DSATX to not send a startup pulse until the
engine is running
·
Parameters set via the Serial Port stay even when power is completely disconnected. They are
stored in Non-Volatile Memory
Advanced Mode: This mode is simply going in and hard-coding various settings. Advanced setting
adjustments include button press duration, deep-sleep disable, temperature range adjust,* etc. These
settings are accesses by using the “Get” and “Set” commands. See the Serial Port Section for more
information.
*Note: modifying the temperature settings to allow higher operating temperatures will void the manufactures limited warranty.
3.3.
LED Codes
·
·
·
·
·
·
·
OFF = System Off / Sleep Mode
ON = Running Mode, the computer starts up in this mode (does not indicate computer is on)
1 blinks = Main Countdown Timer
2 blinks = Power Down (after shutdown pulse is sent)
3 blinks = N/A
4 blinks = Over or Under Temperature Condition. (Are you using a fan?)
5 blinks = Power Supply Overload or Fault (ACC must go low to clear a fault)
3.4.
Basic Mode Timing Diagram
Sleep
Running
Count Down
Power Down
Sleep
Mode
Accessory (J5)
Engine Running
+5V Standby
t1
t2
t3
MB Power Switch (JP1)
Computer On
User Switch (JP1)
t1 = Time between ACC going High and the Computer Startup Pulse (TURNONDELAY). Default = 1s
t2 = Time between ACC going Low and the Computer Shutdown Pulse (Set by P1). Default = 600s (P1=50%)
t3 = Time between Computer Shutdown Pulse and +5V Standby OFF. Default = 90s Max, 2s Min
*User Switch is optional. The DSATX only listens for User Switch during the t2 Countdown Mode (LED = 1 blink)
3.5.
Features Explained
3.5.1.Startup/Shutdown Sequencer
The DSATX is has the ability to turn on and turn off the computer via the JP1 pins G1,G2 connection.
Connecting a 2-pin jumper wire will allow the DSATX to tell the motherboard to turn on and turn off by
simulating a power button press. The DSATX knows if the motherboard is on or off and will only send the
startup pulse if off and the shutdown pulse if on. This way the DSATX does not get into a weird state where it
turns the computer on/off when it wasn’t suppose to due to the user issuing a manual startup/shutdown.
3.5.2.Input Voltage Monitoring and Engine Cranking
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The DSATX is constantly monitoring the input voltage at the VIN terminal to make sure the conditions
are right to be operating a computer motherboard in the vehicle. The DSATX will not initially turn on unless the
voltage is above the value set by the P1 (or the serial adapter). Once the computer is up and running, the
DSATX can survive engine cranking for up to 10 seconds. If the voltage at VIN is outside the allowable range,
(battery too low) the DSATX will wait for sufficient charge before starting the computer and operating normally.
The DSATX will survive engine cranking under the majority of normal use cranks. If the battery is too old or too
depleted, there will be a point where no solution is capable of surviving engine cranking. Following the wire
gauge and installation guidelines will provide the best results.
3.5.3.Input Transient, and Reverse Voltage Protection
The DSATX has components that prevent the DSATX from being damaged from the harsh conditions
present in a motor vehicle. Transients above 24 volts (Load Dump) are shunted by the protection components.
Reverse voltage conditions will blow the fuse before damaging components on the DSATX.
3.5.4.Thermal Protection/Monitoring
The DSATX is equipped with a temperature sensor that monitors the ambient temperature around the
DSATX. The DSATX is programmed to only allow operation while the temperature is inside the window of -10c
to 55c. If outside this range, the LED will flash 4 times and the DSATX will not provide power. Once the out of
range condition goes away, the DSATX will behave like ACC was applied right at that point. This protects the
DSATX, and the computer hardware from temperature extremes and potentially damaging over and under
temperature conditions.
3.5.5.Output Voltage Protection/Monitoring
The DSATX is constantly monitoring the Output Rails while operating. If the rails are ever overloaded,
or shorted to ground or each other, the DSATX will detect that within 50ms and turn off all outputs and go into
the “Fault” state. This will protect the computer hardware in the event that the DSATX is over loaded, or if the
DSATX should fail for any reason. When rails are shorted, for example 5 volts to 12 volts, other power
supplies on the market will not detect an over voltage condition, which will damage 5-volt rated computer
components.
3.5.6.Output Current Limiting
The output rails of the DSATX are designed to current limit such that they will begin to sag before the
components are overloaded beyond their manufacturer rating in a way that could cause a fire or meltdown.
The current limiting will be detected by the continuous output voltage monitoring and trigger a fault condition.
3.5.7.Sleep Mode/Battery Preservation
When ACC goes low and stays low for a few seconds, the DSATX goes into low power Sleep Mode. In
this state +5VSB is turned off (by default) and less than 4 mA is drawn by the DSATX. This will allow the
DSATX equipped computer system to sit for weeks without depleting the battery. As soon as ACC goes high,
the DSATX wakes from sleep mode. If ACC is always tied high, the DSATX will never enter sleep mode.
3.5.8.Start On Engine Running (VTURNON)
When this feature is enabled with the serial adapter, the DSATX will not immediately turn on with ACC
going high. ACC still needs to be connected as normal; however the DSATX will not turn on the computer until
the voltage at VIN reaches 13 volts. This indicates that the alternator is charging the battery and the battery
has sufficient charge to easily run the computer. This is useful if the system is approaching the upper limit of
the DSATX’s capability, or if the vehicle sits for a long time. It doesn’t prevent cranking while running while
going from the “Count Down” state back into the “Running” state, however the cranking while the vehicle has
been sitting for a long time is the most likely to go below the 8 volt threshold of the DSATX. While the DSATX
not surviving engine cranking is unlikely, some users like the piece of mind not worrying if “this crank” is going
to be the one to cause a hiccup.
3.5.9.AUX Output Signal
The connection at location JP1 F1,F2 can be used to provide a signal to an amplifier or auxiliary accessory
or slave power supply (like the DSX12V) to come on after the Turn On pulse is sent. This is an open collector
output at F1 and F2 is ground. A relay or transistor is required to deliver a 12 volt output at this location. This
pin should sink no more than 50mA and has an allowable pull-up range of 0-25 volts.
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4. Serial Port Connectivity
4.1. Serial Port Adapters
The DSATX was developed to be used with the serial hardware interface standard developed in the
Robotics Industry by Acroname Inc. The DSATX is compatible with both the USB Serial Adapter and the
RS-232 Serial Adapter.
·
·
RS-232 DB-9 Adapter - PN: S13-SERIAL-INT-CONN
USB B-Type Adapter - PN: S19-USB-SERIAL-INT-CONN
4.2.
Serial Port Overview
DSATX Location J2 has a 4-pin header that matches the connection diagram on the above adapter
drawings. The 5-Volt power comes from the DSATX and is always active even in sleep mode. Be careful
not to expose the serial port pins of the DSATX to voltages above 5 volts or short out the pins. Connecting
the Serial Port adapter backwards will not damage the DSATX or the adapter, but it will not function and is
not recommended.
The serial port is setup to use 9600 Baud, 8 Data bits, No parity, 1 Stop bit, and no flow control
(9600,8,N,1). Computer programs like HyperTerminal or TeraTerm are examples of applications that can
be used to interface with the DSATX’s Extended Basic and Advanced Modes. The USB adapter creates a
virtual COMM Port.
4.3.
Basic Programming Control
The DSATX responds to the following commands over the serial interface (Case Sensitive):
E: Enable Writing Parameters (Allows the below commands to work)
P: Enter Program Mode
D: Load Factory Defaults
F: Enable the printing of the serial diagnostic feed (Feed On)
O: Stop the printing of the serial diagnostic feed (Feed Off)
Z: Set the shutdown counter to 2 seconds (causes a quick shutdown in Countdown Mode)
@: Force a power button press, shutdown or startup (for testing JP1 G1,2 polarity)
G: (Advanced Feature) Get Parameter or Query
S: (Advanced Feature) Set Parameter
4.4.
Diagnostic Feed
When the Diagnostic Feed is turned On, the DSATX has a diagnostic output that comes over the serial
port output every 200ms. It includes the voltage of the input and outputs, the state of the controller, as well
as some of the control signals. This is enabled by first typing ‘E’ to enable writing, and ‘F’ to enable the
Feed. It is turned Off by typing ‘O’. These are case sensitive commands. The DSATX will remember the
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last setting so if the Feed is turned off and then power is removed from VIN, the next time it powers up the
Feed will be still be off.
The Diagnostic Feed takes this format:
+030.3:12.56:12.00:05.19:03.34:10.49:0560:YNYY:3:0558
A : B : C : D : E : F : G : H :I: J
A: Ambient Temperature in Degrees C
B: Input Voltage at VIN
C: 12-Volt Rail Output
D: 5-Volt Rail Output
E: 3.3-Volt Rail Output
F: Low Voltage Threshold (P2 Adjusts this in Basic Mode)
G: Number of Seconds for main Shutdown Timer (P1 Adjusts this in Basic Mode)
H: Yes/No=Good/Bad : (VIN Voltage Good, Acc Pin High, Temp Good, PS_ON Asserted)
I: State of Shut Down Controller:
(0: Sleep, 1: Startup, 2: Running, 3: Count Down, 4: Shut Down)
J: Relative Count Value for Shutdown Counter (seconds)
4.5.
Extended Basic Programming Examples
In the below example, we program the DSATX. Tell it to use the Pots (P1,P2) for the Timer1 (Main
Countdown Timer) and the low voltage threshold cutout (P2 selects a value between 10 and 12 volts).
Maxtimer1 is the maximum seconds you can set with the P1 Pot. Basically, if you set the pot half way and had
Maxtimer1 set to 1200, it would shutdown in 600 seconds. If you set the Maxtimer1 to 0060 you would have
between 0 and 60 seconds to select with the P1 Pot. You must type 4 numbers, Ex: 0123
>E
ß Type the letter E
Enable Writing? y/n
>y
ß Type the letter y
>P
ß Type the letter P
PROGRAM MODE
Use POTs? y/n
>y
ß Type the letter y
MAXTIMER1:
>1200
VTURNON? y/n
>n
ß Type ‘1200’ (must type 4 numbers)
ß Type the letter n
DONE
In the below example, we program the DSATX to hard code the values for the Timer1 (Main Countdown
Timer) and the low voltage threshold. This will override P1 and P2 Pots. If you set LOWVOLTS to 1050, the
unit wouldn’t shutdown until it hit 10.50 volts on the VIN input. If you set Timer1 to 0600, then after 600
seconds of ACC going away, the computer will begin the shutdown sequence. We will also enable the
VTURNON feature so the computer will turn on only after the engine is running.
>E
ß Type the letter E
Enable Writing? y/n
>y
ß Type the letter y
>P
ß Type the letter P
PROGRAM MODE
Use POTs? y/n
>n
ß Type the letter n
LOWVOLTS:
>1050
TIMER1:
>0600
VTURNON? y/n
>y
ß Type ‘1050’ (must type 4 numbers)
ß Type ‘0600’ (must type 4 numbers)
ß Type the letter y
DONE
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4.6.
Advanced Features
For some users enough is never enough. The DSATX has the ability to fine tune many of the parameters
that control its behavior. By using Set and Get commands (‘S’ and ‘G’) it is possible to read and write these
parameters to the DSATX. To use the Set command, type at the prompt, an ‘S’ followed by 2 numbers for the
index, followed by either 4 numbers or 1 number for the value.
Ex:
>S011130 ß Set parameter 1 (LOWVOLTS) to 11.30V
To use the Get command type ‘G’ at the prompt followed by the 2 number index.
Ex:
>G90 ß Get parameter 90 (Program Memory Version)
0108 ß Returns this result (1.08)
4.7.
Advanced Feature Tables
The following tables show the available Parameter settings and Queries. Parameters will respond to the
Set and Get command. Queries will only respond to the Get command.
Factory
Default
Value
Set By 'P' in
Extended
Index
Basic Mode
Parameter
Units
Description
Y
LOWVOLTS
VINHIGHTHRESH
HIGHVOLTS
VOLTSHYST
VOLTSTHYST
VOLTSTHYST1
TURNONDELAY
PULSEWIDTH
MAXTIMER1
TIMER1EE
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1100
1300
1650
0045
1000
0100
0100
0100
1200
1200
0090
1
10mV
10mV
10mV
10mV
10ms
10ms
10ms
10ms
1s
Hard Coded Vin Low Battery Threshold (if USEPOTS =0)
Alternator "Turn on" Voltage Threshold
Vin Over Voltage Threshold
Vin Voltage Hysteresis (Engine Cranking)
Vin Voltage High to Low Time Window (Engine Cranking)
Vin Voltage Low to High Time Window
Time To Wait After ACC High before sending turn on pulse
Motherboard Power Switch Press Duration
Maximum CountDown Time set by Potentiometer P1
Hard Coded CountDown Time (if USEPOTS =0)
Time Allowed for Computer to Shut Down
Y
Y
1s
TIMETOKILL
USEPOTS
1s
Y
Y
1=yes, 0=no If set, P1 and P2 set CountDown Time and Vin Low Battery Threshold
1=yes, 0=no If set, Unit Will go use Sleep Mode, ACC High for Wake Up
1=yes, 0=no If set, Serial Port Diagnostic Status Feed is Enabled
ENABLESLEEP
FEEDON
1
1
VTURNON
0
1=yes, 0=no If set, Mb Switch Press occurs after Vin is above VINHIGHTHRESH
ACCTIMEVAL
TEMPHIGH
0050
0550
0100
0050
0
10ms
Settling time for the ACC input (Debouncing time)
0.1 deg C Maximum Operating Temperature
TEMPLOW
TEMPHYST
0.1 deg C Minimum Operating Temperature (Can be Positive or Negative)
0.1 deg C Temperature Stabilization Margin (Hysteresis to Prevent Oscillations)
1=pos, 0=neg Polarity of TEMPLOW (Minimum Operating Temperature)
TEMPLOWSIGN
TEMPTHYST
ENABLE5VSBOFF
ENABLESHUTDOWN
MASTERMODE
EARLYAUXCUT
0200
1
10ms
Temperature Time Stabilization Window (Temp must stay good/bad)
1=yes, 0=no Allows +5VSB Rail to Turn Off to Save Battery Life
1
0
1=yes, 0=no Allows unit to Send the Motherboard Switch Press for Shutdown
1=yes, 0=no Allows DSATX to be cascaded with 2 or more DSATX for more Power
1=yes, 0=no AUX will go away as soon as shutdown pulse is sent
0
Query
PlusVIN
Plus12
Index
40
41
Units
10mV
10mV
10mV
10mV
Discription
The Current Voltage at the VIN terminal
The Current Voltage on the 5V Rail
The Current Voltage on the 12V Rail
The Current Voltage on the 3.3V Rail
N/A
N/A
N/A
N/A
N/A
N/A
Plus5
42
Plus3_3
43
ActualTemp
TempSign
44
0.1 deg C The Current Temperature
45
1=pos, 0=neg The Current Temperature Polarity
Current VIN Low Voltage Threshold (hardcoded or set by P2 between 10-12
volts)
Current CountDown Timer Value (hardcoded or set by P1 between 0 and
MAXTIMER1)
LowVoltThresh
46
47
N/A
N/A
10mV
1s
CountDownTimerVal
Current State: 0 = Wakeup, 1 = Startup, 2 = Running, 3 = Count Down, 4 Shut
Down, 5 Sleep, 6 Bad Temp
CurrentState
MainCounter
P_VERSION
E_VERSION
48
49
90
91
N/A
N/A
N/A
N/A
N/A
1s
N/A
N/A
Current Value of Counter used when Counting Down to Swtich States
Flash Memory Version Number
EEPROM Memory Version Number
DSATX Manual
Copyright 2006 Mpegbox.com
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5. Specifications
5.1.
Electrical
Electrical Specifications:
Input Voltage (Operating)
Input Voltage (Full Load)
Input Current
6-24 Volts Non-Regulated
8-16 Volts Non-Regulated
20A (20A mini-blade fuse)
220 Watts Max
< 70mA
Output Power
No Load Operating Current
Sleep Current (All Rails Off)
Efficiency
< 4mA
> 95%
Individual Supply Outputs
5.0 Volts +/- 2%
3.3 Volts +/- 2%
12.0 Volts +/- 2%
5.0 Volts Standby +/- 2%
-12.0 Volts +/- 10%
Max Output Current
12 Amps Nominal, 13 Amps Peak
10 Amps Nominal, 11 Amps Peak
12 Amps Nominal, 15 Amps Peak
1.5 Amps
100 mA
Electraical I/O Specifications
ACC Input Threshold
ACC Input Impedance
MB Power Switch Output Drive
AUX Output Drive
Low = < 4V, High = >7V (30V Max)
100k Ohms
Open Collector, 50mA Max
Open Collector, 50mA Max
10k Ohms to 5V
User Switch Pull-Up Drive
Serial Port Rx/Tx
Low = < 0.7V, High = >2V (5V Max)
Supervisor Specifications (Basic Mode)
P1 - Countdown Timer Range
P2 - Low Voltage Cutout Range
Operating Temperature Range
Controlled Temperature Range
MB Turn On Delay
0-20 minutes (10 minutes default)
10-12 volts (11 volts default)
-40 to +90 degrees Celsius
-10 to +55 degrees Celsius
1 second
MB Power Switch Duration
Max Shutdown Timer Range
1 second
90 seconds
5.2.
Mechanical
Mechanical Specification
Board Dimmensions
4.15"L x 3.5"W x 1.0"H (106x99mm)
Mounting hole corridnates (in)
Mounting hole size (in)
Board Thickness (in)
(0.2, 0.2) (0.2, 3.3) (3.5, 3.3) (3.5, 0.2)
0.125
0.062
DSATX Manual
Copyright 2006 Mpegbox.com
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5.3.
Connector Pin Diagrams
J7
ATX PWR
+12V
+5V
+5V
N/A
GND
J5
+5VSB
PWR_OK
GND
J8
INPUT PWR
ATX12V
GND +12V
+5V
GND
+5V
GND
GND
PSON#
ACC
+VIN
GND
GND
+3.3V
+3.3V
GND
-12V
+3.3V
GND +12V
JP1
GND
GND
(G) MB_SW
(F) AUX_SW
J1
FAN
J2
COMM
GND
GND
GND
GND
(E) SL_SEN
(D) USER_SW
(C) USER1
RX(IN)
+5VD
(B) USER0
TX(OUT)
GND
RESET#
(A) +5VD
P1 & P2
POTS
F1
Fuse
D8
LED
P1 = More Time
20 Amp
Mini-Auto
P2 = Higher Voltage
DSATX Manual
Copyright 2006 Mpegbox.com
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6. Troubleshooting
7. Mpegbox.com Limited Warranty
The DSATX Power Supply carries a Limited Warranty for the Period of 1 year from the date of purchase.
Mpegbox.com warrants its products to be free from defects in workmanship and materials for a period of one
(1) year from the date of purchase, Mpegbox.com will repair or replace the unit at our option, without charge
for parts or labor. After the period of one year, the customer will be responsible for all charges for parts and
labor. This limited warranty is extended only to the original purchaser. It does not cover any equipment
connected to the DSATX or other consumable parts; transportation costs, or any damage incurred in transit.
This warranty will become void if the serial number identification has be wholly or partially removed or altered.
Repair ore replacement under the terms and conditions of this warranty does not extent the term of this
warranty. Any modification of the temperature control system parameters or modifications to the mechanical or
electrical structure of this product will void this limited warranty.
A Return Material Authorixation (RMA) must be obtained prior to returning the product by emailing
[email protected]. The RMA number must be marked on the outside of the shipping container and copy
of a sales receipt or invoice must be included. Please include a brief description of the symptoms, your name,
address, email and any other relevant instructions. Returns must be shipped prepaid in a static safe with
adequate padding before returning to Mpegbox.com
DSATX Manual
Copyright 2006 Mpegbox.com
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