Installation manual
 Installation Guide 
18 
3.4.3  22-Pin Connector Definition 
With the 22-pin connector, installers can simply connect the power, video and 
RS-485 cables to the dome at once. Particularly, the alarm pins are 
serviceable for connecting alarm input and output devices, such as alarm 
sensors, sirens or flashing lights with the surveillance system. For the 
definition of each pin, please refer to the list below. 
The 22-pin connector definition is listed as below. 
Pin  Definition  Cable 
1 
  AC 24-1/DC (+) 
20AWG 
2 
 ALM NC 
3 
  AC 24-2/DC (-) 
20AWG 
4 
 ALM NO 
5 
 FG  20AWG 
6 
 ALM COM 
7 
 T+ 
8 
 R- 
9 
 T- 
10 
 R+ 
24AWG 
11 
 ISOG 
12 
 ALM-1 
13 
 ALM-3 
14 
 ALM-2 
15 
 ALM-4 
16 
 ALM-5 
17 
 ALM-6 
18 
 ALM-7 
19 
 ALM-8 
20 
 ALM GND 
21 
 VGND 
22 
 Video 
24AWG 










