ACTi A416, Hardware Manual

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Hardware Manual
18
The table below shows the DI/DO connection specifications:
Device
DI
(Alarm IN)
Connection design TTL - compatible logic levels
Voltage
To trigger (low) Logic level 0: 0V ~ 0.4V
To trigger (high) Logic level 1: 3.1V ~ 12V
DO
(Alarm OUT)
Connection design Transistor (Open Collector)
Voltage & Current < 12V DC, < 30mA
Connecting Audio Devices
Audio input / output devices, such as an active microphone or speaker can be connected to
the camera using the supplied terminal block which is already connected to the AUDIO cable
connector.
Loosen the screw and insert the wire through the pin slot, then tighten the
screw to secure the wire.
To connect audio devices, map the pins to one of the pin combinations
below:
Device Pin Mapping Instructions
Audio Output
(OUT)
OUT Connect the wires of the audio output device to OUT
and G (Ground).
G
Audio Input (IN)
IN Connect the wires of the audio input device to IN and
G (Ground).
G
NOTE : For more information about AUDIO in connections, please refer to the Knowledge
Base article How to Use Audio-in of ACTi Cameras , downloadable from the link below
( http://www.acti.com/support/KnowledgeBase/outside/detail.asp?KB_ID=KB20100114003 ).