X8DTU-6F+/X8DTU-6TF+/X8DTU-6(T)F+-LR
Unit Identifier Switches
Two Unit Identifier (UID) Switches and LED Indicators are located on the motherboard. The Front Panel UID Switch is located at Pin 13 on the Front Control Panel (JF1). The Rear UID Switch is located next to the UIOP Power connector on the rear side of the motherboard. The Front Panel UID LED is located at Pin 7 of JF1, and the Rear UID LED is located at LED2. When you press a UID switch on the front panel or on the back panel, both Rear UID LED and Front Panel UID LED will be turned on. Press the UID switch again to turn off both
UID Switch (UID)
Pin Definitions
Pin# Definition
1Ground
2Ground
3Button In
4Ground
UID LED (LED 2)
Status
Color/State | OS Status |
| |
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| |
Blue: On |
| Windows OS | Unit Identified |
|
|
|
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Blue: |
| Linux OS | Unit Identified |
Blinking |
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LED Indicators. These UID Indicators provide easy identification of a system unit that may be in need of service. See the table on the right for pin definitions.
Note: UID LED is supported by a physical switch or the BMC controller. When it is controlled by the physical switch (for a Windows system), it will stay solid. When it is controlled by the BMC (for a Linux system), it will blink.
Ground
X
FP PWRLED 
HDD LED
NIC1 Link LED 
NIC2 Link LED
Blue+ (OH/Fan Fail/
PWR FaiL/UID LED
Power Fail LED
Ground
Ground
20 | 19 |
2 1
NMI
X
3.3 V
3
ID_UID_SW/3/3V Stby
NIC1 Active LED
NIC2 Active LED | 4 | |
|
| |
Red+ (Blue Led Cathode) | ||
3.3V |
|
|
Reset | Reset Button |
|
PWR | Power Button |
|
1 2 | 1. | Rear UID Switch |
| 2. | Rear UID LED (LED 2) |
| 3. | FP UID Switch |
| 4. | FP UID LED |
X8DTU-6F+
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