Dahua MCVR6204 - Alarm Port Introduction; Alarm Input Port

Installation 15
Alarm Input Type
Both NO and NC are supported.
2.6.1 Alarm Port Introduction
Alarm input/output port Figure 2-21
Name
Function
1–9
Alarm input 1–9. 1–7 represent local alarm input; 8 and 9 represent
pulse input.
C, NO
Alarm output port that outputs alarm signal to alarm device.
 NO: Alarm output port of Normally Open type.
 C: Common alarm output port.
L, H
CAN port
Ground line
CTRL 12V
12V/0.75A output with switch control
A, B
RS-485 port that connects to speed dome with PTZ function.
2.6.2 Alarm Input Port
 Both NO and NC are supported.
 The GND of alarm detector is in parallel connection with COM (the power supply of alarm
detector should be from external power source). See Figure 2-22.
 The GND of alarm detector is in parallel connection with GND of Device.
 Connect the NC port of alarm detector to the alarm input port (ALARM).
 When supplying power from external power source to the alarm device, the alarm device
should be common-grounded with the Device.