Bosch Appliances NBN-921 operation manual Audio connectors

DinionHD 720p IP Camera Installation en 29

5.6Audio connectors

Line

GND

AUDIO IN

1	4	E
		T
2
	5	H
3
	6
		P
		o
		E
		SD

AUDIO OUT

	–
	+
	12 VDC
	24 VAC
1	DATA
	4
2
	5
3
	6

Figure 5.7 Audio connectors

Connect audio devices to the Audio In and Audio Out connectors.

The unit has full-duplex mono audio. The two-way communication can be used to connect a speaker or door intercom system. The audio input signal is transmitted in sync. with the video signal.

Audio input: Line input level (not suitable for direct microphone signal); impedance 9 kOhm typical; 5.5 Vpp maximum input voltage.

Audio output: Line output level (not suitable for direct speaker connection); impedance 16 Ohm minimum; 3 Vpp maximum output voltage.

Wiring: Shielded audio connection cable is advised. Observe maximum cable lengths for audio line input and output levels.

Bosch Security Systems Installation and Operation Manual AR18-10-B013 v1.52 2011.06