Interfaces and Connections

PSU Connection

• The terminal block consists of three main connection points labeled “+”, “-”, and “GND”. These are used for power and grounding:

  • “+” (Positive): Connect the positive voltage supply.

  • “-” (Negative): Connect the negative voltage or return line.

  • “GND” (Ground): Provides a grounding point for safety and signal reference.

LED Indicator Explanations

System Power / Status / Storage Activity

LED	Color on Board	LED Action	Description
POWER	Green	Steady	System Power ON
	Off	N/A	Power OFF
STATUS	Green	Steady	Controlled by GPIO
	Red	Steady	Controlled by GPIO
	Off	N/A	Controlled by GPIO (Default) or Power OFF
Storage	Amber	Blinking	Blinking indicates HDD activity, Include SATA/NVME
	Off	N/A	No data access or No power on

HDD Tray LED

LED	Color	LED Action	Description
POWER	Green	Steady	HDD/SSD Power ON
	Off	N/A	Power OFF
STATUS	Yellow	Blinking	Blinking indicates HDD activity, Include SATA / NVME Storage
	Off	N/A	No data access or Power OFF

RJ-45 LAN LED

1Gb RJ-45 Define:

Speed	Amber (Link/Active)	style=”color:orange”>Amber (Speed)
10M	Blinking / Data access	OFF
100M	Blinking / Data access	ON (Green)
1G	Blinking / Data access	On (Amber)

1. When cable is plug-in and network is linked. Both LED lights will be bright. The behavior is as defined.

2. Without the Cable plug-in, the LED should be off

3. If LAN Driver controls the LED, the behavior will follow the driver

2.5Gb RJ-45 Define:

Speed	Green (Link/Active)	Green/Amber (Speed)
10/100M	Blinking / Data access	OFF
1G	Blinking / Data access	ON (Amber)
2.5G	Blinking / Data access	ON (Green)

1. When cable is plug-in and network is linked. Both LED lights will be bright. The behavior is as defined.

2. Without the Cable plug-in, the LED should be off

3. If LAN Driver controls the LED, the behavior will follow the driver

10Gb RJ-45 Define:

Speed	Green (Link/Active)	Green/Amber (Speed)
100M	Blinking / Data access	OFF
1/2.5/5G	Blinking / Data access	ON (Amber)
10G	Blinking / Data access	ON (Green)

1. When cable is plug-in and network is linked. Both LED lights will be bright. The behavior is as defined.

2. Without the Cable plug-in, the LED should be off

3. If LAN Driver controls the LED, the behavior will follow the driver

25Gb SFP28 Define:

Speed	Green (Link/Active)	Amber/Green (Speed)
10G	Blinking / Data access	ON (Green)
25G	Blinking / Data access	ON (Amber)
Non-Link	OFF	OFF

1. When cable is plug-in and network is linked. Both LED lights will be bright. The behavior is as defined.

2. Without the Cable plug-in, the LED should be off

3. If LAN Driver controls the LED, the behavior will follow the driver