Vitek VT-PTZ220HD, Manual

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Alarm out (NO,NC,COM) activation
Figure 11 - Alarm Cable assignment
GND (Ground)
NOTE: All the connectors marked GND are common.
Connect the ground for the Alarm input and /or alarm output to the GND
connector.
NO / NC (Normal Open or Normal Close /Contact Relay Output)
The dome camera can activate external devices such as buzzers or lights using
dry contact relays. Connect the device to the NO (NC) (Alarm Out) and COM
(Common) connectors. (See Figure 5 /12)
8.7.6 Power Supply (AC/DC)
You can use either AC 24V/2A or DC 12V/2A adaptor.
Use certified / Listed Class 2 power supply Only.
J1: Alarm1(part A) J2: Alarm2 (part B)
Black Alarm1 Black Alarm5
Brown Alarm3 Brown Alarm6
Red Alarm3 Red Alarm7
Orange Alarm4 Orange Alarm8
Yellow A1 GND Yellow A2 GND
Green COM A Green COM B
Blue NC A Blue NC B
Gray NO A Gray NO B