PLANET ICA-HM240 - Manual (Page 11)

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4. MIC in The IP camera has built-in an external microphone connector. User can
connect a microphone to the camera.
5. Line Out Connect a loud speaker to the IP camera. This function is for voice
alerting and two-way audio.
6. DI/DO
Connector
The IP camera provides a terminal block with 4 pins of connectors for DI
and DO. Please refer to the user’s manual for more information.
Alarm I/O connectors:
No. Line Color Function
1 Brown/White 12VDC power supply (50mA maximum)
2 Blue/White GND
3 Green/White Digital signal input
4 Orange/White Digital signal input
5 Purple/White No function, do not connect (NC)
6 Gray No function, do not connect (NC)