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ARK-2121S User Manual
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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
Summary of Contents for ARK-2121S
Page 1: ...User Manual ARK 2121S Outdoor HD NVR w 4 PoE Ports...
Page 9: ...Chapter 1 1 General Introduction This chapter gives background information on ARK 2121S series...
Page 14: ...ARK 2121S User Manual 6...
Page 20: ...ARK 2121V User Manual 12...
Page 25: ...Chapter 4 4 Pin Assignments This chapter explains Pin Assign ments of ARK 2121S Series...
Page 32: ...ARK 2121S User Manual 24...
Page 33: ...Chapter 5 5 BIOS settings This chapter introduces how to set BIOS configuration data...
Page 57: ...Appendix A A WDT Sample Code...
Page 59: ...51 ARK 2121S User Manual Appendix A WDT Sample Code...