Installation Manual
    Installation Manual 
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MegaDome
®
 G3 
Auxiliary I/O Functions 
The auxiliary input and output are accessible after removing dome cover. 
Reference # 
Description  
1 
Input (White + / Black -) 
2 
Output (Orange + / Yellow -) 
NOTE: MegaDome
®
 G3 camera supports digital input and digital output. See Table 1 for electrical 
characteristics. 
Electrical Characteristics 
MIN 
MAX 
Input Voltage (V) 
(Measured between + 
and – terminals) 
ON 
3.5 
6.3 
OFF 
0 
1.3 
Output Current (mA) 
(Measured between + 
and – terminals) 
Applied Voltage 
Range: 0-80V 
ON 
- 
50 
OFF 
- 
0.1 
Table 1 
NOTE: The digital input is electrically isolated from the rest of the camera’s electrical circuitry via 
general-purpose photo couplers. The input is additionally protected with a serial 250 Ohm resistor, and 
a de-bouncing circuit. Duration of any input signal should be at least 5 ms to comply with the 
requirements of the de-bouncing circuit.  
NOTE: Table 2 shows the cable color for digital input and output.  










