Installing and Replacing Desktop Board Components
Chassis Intrusion Header
Figure 27, E shows the location of the chassis intrusion header. This header can be connected to a mechanical switch on the chassis to detect if the chassis cover is removed.
Table 8 shows the pin assignments and signal names for the chassis intrusion header.
Table 8. Chassis Intrusion Header Signal Names
Pin Description
1Intruder
2Ground
IEEE 1394a Header
Figure 27, F shows the location of the IEEE 1394a header. Table 9 shows the pin assignments and signal names for the IEEE 1394a header.
Table 9. IEEE 1394a Header Signal Names
Pin | Signal Name |
|
|
1 | TPA1+ |
|
|
3 | Ground |
|
|
5 | TPA2+ |
|
|
7 | +12 V |
|
|
9 | Key (no pin) |
|
|
Pin | Signal Name |
|
|
2 | TPA1- |
|
|
4 | Ground |
|
|
6 | TPA2- |
|
|
8+12 V
10Ground
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