Terminal Connectors：
T+ RS-485 sends +
T - RS-485 sends -
R- RS-485 receives -
R+ RS-485 receives +
ALARM1-4 Camera alarm input.
GND GND.
N.C Relay N.C.
COM Relay COM
N.O Relay N.O.
EXAMPLE 1：Connect Alarm In One with PIR (Passive Infrared).
EXAMPLE 2：Connect with Alarm Siren at Relay N.O.
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