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Chapter 4: Motherboard Connections
4.2 Headers and Connectors
The data cables in the system have been carefully routed to maintain airflow efficiency. If you
disconnect any of these cables, take care to re-route them as they were originally.
Important!
Make sure the the cables do not come into contact with the fans.
Fan Headers
There are eight fan headers on the motherboard. These are 4-pin fan headers; pins 1-3 are
backward compatible with traditional 3-pin fans. The onboard fan speeds are controlled using
IPMI. When using the Fan Mode setting, use only 4-pin fans.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
4
PWM Control
Chassis Intrusion
A chassis intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to the header to inform you when the chassis is opened.
Chassis Intrusion
Pin Definitions
Pins
Definition
1
Intrusion Input
2
Ground
Disk-On-Module Power Connector
The Disk-On-Module (DOM) power connectors at JSD1 and JSD2 provide 5V power to a
solid-state DOM storage device connected to one of the SATA ports.
DOM Power
Pin Definitions
Pin#
Definition
1
5V
2
Ground
3
Ground