Advantech PCA-6774, Руководство пользователя

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PCA- 6774 User’s Manual 24
2.18 Power connectors (CN14, CN15)
2.18.1 Main power connector, +5 V, +12 V (CN15)
Supplies main power to the PCA-6774 (+5 V), and to devices that require
+12 V.
2.18.2 CPU Fan power supply connector (CN14)
Provides power supply to CPU cooling fan. Only present when +12 V
power is supplied to the board.
2.19 ATX Power & HDD LED, speaker out Connector
(CN16, CN17, CN19)
Next, you may want to install external switches to monitor and control the
PCA-6774. These features are optional: install them only if you need
them. CN16, CN17, CN19 integrated in one connector, which is an 5x3
pin header, 180degree, male. It provides connections for a speaker, hard
disk access indicator
.
2.19.1 HDD LED (CN19)
The HDD LED indicator for hard disk access is an active low sig-
nal(24mA sink rate).
2.19.2 ATX power LED&KB-LOCK (CN16)
Power supply activity LED indicator and KB_lock funcation.
2.19.3 Speaker out(CN17)
Support a buzzer function, pin assignment refer to Appendix C.
.
2.20 COM port connector(CN9,CN10, CN29)
The PCA-6774 provides two serial ports (COM1: RS-232 and COM2:
RS422/485)) in one COM port connector. It provides connections for
serial devices (a mouse, etc.) or a communication network. You can find
the pin assignments for the COM port connector in Appendix C.