OPUS
ATX/ITX DC-DC 90W Power Supply User Guide
Solutions, Inc.
www.opussolutions.com
©
OPUS Solutions, Inc. 2002,2003; UG-DCX3.xx09 14-MAR-04
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2. Open any application and test for normal operation, then close the application.
3. Push the soft Power On/OFF switch for less than 1 second. The computer should go into Standby or shut down
mode, as it was set in step 6 of configuring your operating system (Windows 2000 Pro).
4. Wait about 10 seconds and push the soft Power ON/OFF switch again. The computer should power up normally.
5. Open an application for Standby mode testing. Use the application as you would normally.
6. Push the soft Power On/OFF switch for less than 1 second. The computer should go into Standby or shut down
mode, as it was set in step 6 of configuring your operating system (Windows 2000 Pro). See note below
7. Repeat steps 4 to 6 for all applications that are used in your computer.
Note: All applications software must be checked for proper Standby mode operation.
If any application has problem going into Standby mode then the operating system must be configured for Shutdown
Installing the DC-DC Power supply
!! Caution! Observe proper Static protection to prevent damage to your computer or the DC-DC power supply. Use
wrist strap to prevent static damage. The OPUS DC-DC power supply has Static sensitive MOS devices.
Refer to application example drawing.
1. Power down and open the computer case.
2. Remove the AC- DC power supply if was installed.
3. Set shut down delay timer jumpers in the OPUS DC-DC power supply for minimum time (Default factory setting)
4. Install the OPUS DC-DC Power Supply in your computer.
5. Connect the bottom end of 20-pin ATX power cable Y cable to OPUS DC-DC power supply J7 –ATX/ITX Power
Connector. Connect the 20-pin connector end to a Power connector on the ATX/ITX motherboard.
6. Connect the 4-pin drive power cable end to the appropriate Drives.
7. Connect the 2-pin cable (polarized side) to J5- (Power-switch) of DC-DC power supply. Connect the other end to the
motherboard 2 pin ITX power switch/soft power switch pins on the F_Panel header.
Important: proper polarity is required to function accurately. The green wire side of the 2-pin connector must be
connected to the +ve side and white wire side must be connected to the – ve side of pins.
VIA, EPIA-M ITX motherboard: F-Panel header Pin 6 is +ve (green wire side) and pin 8 is –ve (white wire side).
Refer to motherboard user guide.
Intel D815EEA2 motherboard: Front panel header Pin 6 is +ve (green wire side) and pin 8 is –ve (white wire side).
Refer to motherboard user guide.
8. Wire the 3 pins DC input power connector.
Pin 1: Battery Positive. Use RED color # 12 AWG automotive grade wire.
Pin 2: Ground or Battery Negative. Use Black color # 12 AWG automotive grade wire.
Pin 3: Ignition or Switched Battery. Use Yellow #18 AWG automotive grade wire
9. Insert the 3 pin input power cable connector to OPUS DC-DC power supply input power connector.
10. Double-check all wiring for proper connection, power feed and battery polarity to the power supply.
11. If the power feed to the power supply/ PC is connected properly, Status Green LED in the OPUS DC-DC power
supply should blink at a rate of approximately .1 sec. ON and 2.5 sec OFF. This is the idle /standby state of power
supply.
