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4. Each Component Function
Component Function
Power switch : POWER SW
This is the power switch. You can use this component to turn the power on or off. Depending on the
operating status of the main unit, this component operates as shown below.
Standby status (Standby power supply : ON, Main power supply : OFF)
System start operation:
When a low pulse is applied, the main power supply turns on and the system starts. Use an input pulse
width between 0.1 seconds and 3 seconds.
OS started status (Standby power supply : ON, Main power supply : ON)
Shutdown operation :
When a low pulse is applied, the shutdown process is performed, and then the product switches to the
standby status.
Forced shutdown status :
When a low pulse with a pulse width of 3 seconds or longer is applied, the forced shutdown process is
performed. The power supply is forcibly turned off and the product switches to the standby status without
performing the OS shutdown process. HDD files may be corrupted, so only use this function in
emergencies.
Power LED : POWER LED
This is the power supply LED. It lights when the power supply is on.
Hard disk LED : HDD LED
These are the HDD access LEDs. They light when the HDD is being accessed.
Figure 4.2.
Lit HDD Access LEDs
System Status (Operation Mode)
Starting
Normal mode, no host access
Normal mode, host access, writing
Normal mode, host access, reading
Reset switch : RESET SW
The product is equipped with a hardware reset switch. To prevent the pressing of this switch in error, the
switch is difficult to press. Use a fine-tipped object to press the switch.
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HDD1 LED
HDD2 LED
表示色
表示色
Off
Off
Off
Off
Green
Off
Green
Off
EPC-2020 Series User's manual
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