Installing and Replacing Desktop Board Components
Chassis Intrusion Header
Figure 23, 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 10 shows the pin assignments and signal names for the chassis intrusion header.
Table 10. Chassis Intrusion Header Signal Names
Pin Description
1Intruder
2Ground
USB 2.0 Headers
Figure 23, G shows the location of the USB 2.0 headers. Table 11 shows the pin assignments and signal names for each USB 2.0 header. Each USB header can be used to connect two USB devices.
Table 11. USB 2.0 Header Signal Names
| USB Port A |
|
|
Pin | Signal Name |
1 | Power (+5 V) |
3 | D- |
5 | D+ |
7Ground
9Key
| USB Port B |
Pin | Signal Name |
2 | Power (+5 V) |
4 | D- |
6 | D+ |
8 | Ground |
10 | No Connection |
NOTE
Computer systems that have an unshielded cable attached to a USB port might not meet FCC Class B requirements, even if no device or a
51