QSD2308L/QSD2316L DVR User’s Manual10Fig 2.5 Sensor ConnectionAlarm output:The DVR has 4 channel relay alarm output, which just gives on/offsignal to external alarm. The status of these pin are illustrated as 8.NO..COMNC..NO..COMNC..Beforealarm AfteralarmFig 2.6 Relay Output StatusUsers need connect their alarm according to the NO or NC type ofthe alarm. One connection example is shown as Fig 2.9Fig 2.7 Alarm Output ConnectionNote: The power in series must be 277VAC/10A or 30VDC/10A or below
