CarNetix PSU-PC19 DC Installation Manual
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CarNetix PSU-PC19 V2.0 Installation Manual2.2.3 Using JP3 ACPI Relay OutputJP3 is the output of the ACPI relay. These are “dry contacts” and act as a short circuit to produce theACPI pulse for starting (booting) your Xenarc SC8. These contacts simulate the power switch on thechassis of your Xenarc SC8. When connecting to JP3 polarity does not matter since the relay acts asa simple short circuit. This means that you can connect the GRN wire or BLK wire to either pin.2.2.4 Setting JP4 (Secondary Output Control)The JP4 jumper gives you the flexibility to use the Secondary Output in different ways dependingupon your CarPC system configuration. The Secondary Output can be turned ON or OFF based ontwo different control signals: 1) DLYON or, 2) the signal that controls the Primary Output (PRIOUT).• DLYONJumpering DLYON will turn your Secondary Output ON or OFF with the DLYON signal. Thismeans that your Secondary Output will come on 3 seconds after your Primary Output comes ON,and will go OFF when your ignition is turned OFF.If you use the Secondary Output to power your screen (+12V) and want your screen to turn on andoff with your CarPC’s main power, then select DLYON to control your Secondary Output.• PRI OUTJumpering PRI OUT will make the Secondary Output follow the control used to turn ON and OFFthe Primary Output. Thus, when the Primary Output is ON, the Secondary Output will also be ON. Ifthe Primary Output is OFF, the Secondary Output will be OFF.This setting is affected by the jumper setting of the Shutdown Delay AND Hibernate/Standbyjumpers on JP1 as described in the next sections.Shutdown Delay Effects on JP4If you have set the Shutdown Delay jumper to the default position (6 seconds), both the Primary andSecondary Outputs will be turned OFF 6 seconds after the Ignition is turned OFF. If you have set theShutdown Delay jumper for 15 minutes, both the Primary and Secondary Outputs will remain ONfor 15 minutes after the Ignition is turned off. This setting is useful for keeping certain USB devicespowered during the Shutdown Delay time. For example, if you use the Secondary Output to poweryour USB WiFi card and you want to keep your WiFi card powered during the Shutdown Delaytime to transfer files, then set the jumper JP4 for PRI OUT.Hibernate/Standby Effects on JP4If you have the Hibernate/Standby jumper (JP1 Pins 5-6) set to Standby, the primary output is neverturned off (see Standby section). If you also have JP4 jumpered to follow the Primary Output, theSecondary Output will also NOT be turned off when the unit goes into Standby mode. (ie Ignition isturned off). Hence any devices connected to the Secondary Output will remain powered in Standby.- 12 - |
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