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Auxiliary I/O Functions
The auxiliary input and output are accessible after removing dome cover as shown in Figure 1.
Figure 1
The output consists of an optically coupled solid state relay (SSR) and the input has an optocoupler.
Both the SSR and optocoupler have an isolation voltage of 1500 VRMS between the external terminals
and internal camera circuitry. The input is further protected with a serial 250Ω resistor and a
debouncing circuit.
Arecont Vision AUX I/O
ALARM
IN-
S
D
G
ALARM
OUT+
ALARM
OUT-
+
120V
100mA
(max)
-
+
Normally
Open/Close
-
0-12VDC
50mA
(max)
+
-
ALARM
IN+
3.3VO
GND
ALARM-OUT
ALARM-IN
250
Ω
Figure 2: AUX I/O use case example
