Chapter 2: Installation
2-15
Unit Identifi er Switches
Two Unit Identifi er (UID) Switches and LED
Indicators are located on the motherboard.
The Front Panel UID Switch is located at Pin
16 on JF2. The Rear UID Switch is located at
SW1 next to the Infi niBand Connector. The
Front Panel UID LED is located at Pin 17 of
JF2, and the Rear UID LED is located at LE4.
When you press a UID switch on the front panel
or on the back panel, both Rear UID LED and
Front Panel UID LED Indicators will be turned
on. Press the UID switch again to turn off both
LED Indicators. These UID Indicators provide
easy identifi cation of a system unit that may be
in need of service. See the table on the right
for pin defi nitions.
Note
: UID LED is supported by the
physical switch or the BMC. When it
is controlled by the physical switch, it
will stay solid. When it is controlled by
the BMC, it will blink.
UID Switch
Pin# Defi nition
1
Ground
2
Ground
3
Button In
4
Ground
1. Rear UID Switch
2. FP UID Switch & FP UID LED
3. Rear UID Switch & Rear UID
LED
X8DTT-H
Rev. 1.3
1
2
3
UID Switches & LEDs
Description
Location
FP Switch
Pin 16 on JF2
Rear Switch
SW1
FP UID LED
(Blue LED)
Pin 17 on JF2
Rear UID LED
LE4
