Headers And Connectors - Supermicro SYS-521C-NR User Manual

4.2 Headers and Connectors

Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to inform you of a chassis intrusion when the chassis is opened. Refer to
the table below for pin definitions.
4-Pin External BMC I
A System Management Bus header for IPMI 2.0 is located at JIPMB1. Connect a cable to
this header to use the IPMB I
definitions.
Fan Headers
There are six 4-pin fan headers (FAN1 - FAN6) on the motherboard. All these 4-pin fan
headers are backwards compatible with the traditional 3-pin fans. However, fan speed control
is available for 4-pin fans only by Thermal Management via the IPMI 2.0 interface. Refer to
the table below for pin definitions.
Chassis Intrusion
Pin Definitions
Pin# Definition
1 Intrusion Input
2 Ground
C Header
2
C connection on your system. Refer to the table below for pin
2
External I C Header
2
Pin Definitions
Pin# Definition
1 Data
2 Ground
3 Clock
4 No Connection
Fan Header
Pin Definitions
Pin# Definition
1 Ground (Black)
2 2.5A/+12V (Red)
3 Tachometer
4 PWM_Control
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Chapter 4: Motherboard Connections