Supermicro SuperServer SYS-111C-NR - Page 53

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Chapter 4: Motherboard Connections
M.2 Slots
This motherboard has two M.2 slots (JM2_1, JM2_2). M.2 was formerly known as Next
Generation Form Factor (NGFF) and serves to replace mini PCIe. M.2 allows for a variety
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motherboard supports PCIe 3.0 from PCH in the 2280 and 22110 form factors.
Overheat/Fan Fail LED Header
The JOH1 header is used to connect an LED indicator to provide warnings of chassis
overheating and fan failure. This LED will blink when a fan failure occurs. Refer to the tables
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Overheat LED Header
Status
State Denition
Solid Overheat
Blinking Fan Fail
Overheat LED
Pin Denitions
Pin# Signal
1
Pull high to +3.3V
power through 330-ohm
resistor
2 OH Active
Power SMB (I
2
C) Header
Power System Management Bus (I
2
C) header at JPI
2
C1 monitors the power supply, fan and
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Power SMB Header
Pin Denitions
Pin# Denition
1 Clock
2 Data
3 Power Fail
4 Ground
5 +3.3V