LT Security PTZ217X12 Installation Manual - Manual (Page 20)

Installation Manual of 4-inch Speed Dome
11
The alarm provides the relay output (no voltage), and the external power supply is required when it
connects to the alarm device. For DC power supply (left diagram), the input voltage must be no
more than 12VDC, 30mA. For AC power supply (right diagram), the external relay must be used
(right diagram) to prevent damages to the speed dome and avoid risk of electric shock.