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Chapter 4: Motherboard Connections
Thermal Diode Headers
JRT3 is the thermal diode 1 header, and JRT4 is the thermal diode 2 header. They are thermal
sensor headers that provide additional system temperature monitoring.
Thermal Diode 1 Header
Pin Definitions
Pin#
Definition
1
TD1_P
2
TD1_N
Thermal Diode 2 Header
Pin Definitions
Pin#
Definition
1
TD2_P
2
TD2_N
Unit Identifier Switch/UID LED Indicator
A Unit Identifier (UID) switch and an LED Indicator are located on the motherboard. The UID
switch is located at UID, which is next to the VGA port on the back panel. The UID LED
(LED2) is located next to the UID switch. When you press the UID switch, the UID LED will
be turned on. Press the UID switch again to turn off the LED indicator. The UID Indicator
provides easy identification of a system unit that may be in need of service.
Note:
UID can also be triggered via IPMI on the motherboard. For more information on IPMI,
please refer to the IPMI User's Guide posted on our website at
http://www.supermicro.com
.
UID Switch
Pin Definitions
Pin#
Definition
1
Ground
2
Ground
3
Button In
4
Button In
UID LED
Pin Definitions
Color
Status
Blue: On
Unit Identified