Advantech ARK-2121S, User Manual

Page: 30 / 60

ARK-2121S User Manual 22
4.2.8 System Audio Connector
ARK-2121S 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 4.8 System Audio Connector
4.2.9 Optional I/O
ARK-2121S-S9A1E provides two optional DB9 connectors which can have possible
combination as below.
 2 x DB9 connectors for RS-232/422/485 signal (Default)
Table 4.6: Audio Connector Pin Assignments
Pin Audio Signal Name
1 MIC
2 Line-In
3 Line-Out
1 2 3
Table 4.7: 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