13 ARK-1550 User Manual
Chapter 2 Hardware installation
2.4.6 Audio Connector (ARK-1550F only)
ARK-1550 offers stereo audio ports by a phone jack connector of Line-out, Mic-in &
Line-in. The audio chip controller is by Realtek ALC888, High Definition Audio.
Figure 2.8 Line-out Connector
2.4.7 COM Connector
ARK-1550 provides three D-sub 9-pin connectors, which offers 1 x RS-232 & 2 x RS-
232/422/485 serial communication ports (BIOS selectable).
COM 1: RS-232
COM 2: RS-232/422/485
COM3: RS-232/422/485
Figure 2.9 COM Port Connector
11 D- 12 D+
13 GND
Table 2.8: Audio Connector Pin Assignments
Pin Audio Signal Name
1MIC
2 Line-In
3 Line-Out
Table 2.9: COM Connector Pin Assignments
RS-232 RS-422 RS-485
Pin Signal Name Signal Name Signal Name
1 DCD Tx- DATA-
2 RxD Tx+ DATA+
3 TxD Rx+ NC
4 DTR Rx- NC
5 GND GND GND
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 RI NC NC
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