Aposonic A-S0802R18 - Manual (Page 12)

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2.2 Back Panel
1. Video Input Connectors (1-4/8)
Connect system cameras to these BNC connectors. The internal 75Ω
termination is always ON.
2. Main Monitor Output Connectors (MAIN OUT)
Connect TV monitors to the BNC connector for main monitor display.
3. Audio Input Connectors (AUDIO IN)
The RCA connector accepts line-in audio signal supplied from external
devices such as microphone amplifiers.
4. Audio Output Connectors (AUDIO OUT)
The connector supplies line-out audio signal to external devices such as
speakers. Recorded audio will be supplied from AUDIO OUT during
playback.
5. Ethernet Connector
Connect this unit to a 10/100Base-T Ethernet network through this port.
6. Main Monitor Output VGA Connector (VGA)
Connect VGA monitor to the optional D-SUB 15-pin female connector for
main monitor display.
Please note there won’t be video signal for
MAIN OUT BNC connector if VGA is connected.
7. RS-485 Connector
Connect this connector to RS-485 compatible PTZ camera(s) or keyboard.
Please refer to the manuals come with the RS-485 compatible devices for
the correct settings. Please refer to
Appendix D for the Keyboard Control
Protocol for the digital video recorder.