Q-See QSD2316L - Manual (Page 14)

QSD2308L/QSD2316L DVR User’s Manual
10
Fig 2.5 Sensor Connection
Alarm output:
The DVR has 4 channel relay alarm output, which just gives on/off
signal to external alarm. The status of these pin are illustrated as 8.
N O
. .
COM
N C
. .
N O
. .
COM
N C
. .
Before alarm
After alarm
Fig 2.6 Relay Output Status
Users need connect their alarm according to the NO or NC type of
the alarm. One connection example is shown as Fig 2.9
Fig 2.7 Alarm Output Connection
Note : The power in series must be 277VAC/10A or 30VDC/10A or below