Supermicro SuperServer SYS-E302-12A-4C User Manual page 34

System Management Bus Header
A System Management Bus header for additional slave devices or sensors is located at
JSMB1.
LAN Port Activity LED Headers
JTGLED1 is the activity header for LAN3 and LAN4.
Thermal Diode Header
JRT3 is the thermal diode header. This is a thermal sensor header that provides additional
system temperature monitoring.
M.2 Slots
The motherboard has two M.2 slots (JMD1 and JMD2). M.2 allows for a variety of card sizes,
increased functionality, and spatial efficiency. JMD1 supports an M-Key PCIe 3.0 x4 device in
the 2280 form factor, whereas JMD2 supports a B-Key PCIe 3.0 x2/SATA3.0/USB 3.0 device
in the 3052 form factor. See pinpout tables on the following page.
Chapter 4 Motherboard Connections
SMBus Header
Pin Definitions
Pin# Definition
1 Data
2 Ground
3 Clock
4 No Connection
LAN Activity LED
Pin Definitions
Pin# Definition
1 3V3 Stby
2 LAN3_ACT_N
3 3V3 Stby
4 LAN4_ACT_N
Thermal Diode
Pin Definitions
Pin# Definition
1 TD1_P
2 TD1_N
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