Advantech AIMB-740-B, User Manual

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23 Chapter 2
2.12 Front Panel Connectors (CN16, 17, 18, 19, 21&29)
There are several external switches to monitor and control the AIMB-
740-B/741-B.
2.12.1 Power LED and Keyboard Lock (CN16)
CN16 is a 5-pin connector for the power on LED. Refer to Appendix B
for detailed information on the pin assignments. If a PS/2 or ATX power
supply is used, the system's power LED status will be as indicated below:
Table 2.1: PS/2 or ATX power supply LED status
Power mode LED (PS/2 power) LED (ATX power)
System On On On
System Suspend Fast flashes Fast flashes
System Off Off Slow flashes
2.12.2 External speaker (CN17)
CN17 is a 4-pin connector for an external speaker. If there is no external
speaker, the AIMB-740-B/741-B provides an onboard buzzer as an alter-
native. To enable the buzzer, set pins 3-4 as closed
2.12.3 Reset (CN18)
Many computer cases offer the convenience of a reset button. Connect the
wire from the reset button
CN16,17,18,19,21,29
1