
15
4 Cable Connection
4.1 RS485 and Power Cable Connection
There are three cable groups here: power cable, RS 485 and Video cable. Draw
out the cables from the dome to connect with main control devices (such as
monitor, control keyboard, DVR and etc.) and power adapter. Please refer to
Figure 7 Connection sheet.
Power
Red (2-pin) AC 24V(polarity free)
Black GND
RS485
Yellow 485-A
Green 485-B
Black
485-GND
Video
Video port
Video
Figure 7 Connection sheet
4.2 Alarm Cable Connection
Open the dome cover and take PTZ chip core out. Turn the core upside down;
you can see the alarm port. See Figure 8.
Figure 8 PTZ chip core
In Figure 8, please note:
• Numeral 1 to 7 is corresponding to alarm input 1 to 7.
• In alarm out: NO/COM/NC is a normal close/ normal open linkage
output(Open/close );
• GND is grounding cable.
Speed dome alarm signal adopts grounding connection mode.
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