NV-DVR1104/CD, NV-DVR1108/CD and NV-DVR1116/CD ver. 1.1 - user's manual
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ALARM INPUTS AND OUTPUTS CONNECTION
Alarm inputs operate in TTL/CMOS standard, therefore accept appearing 5 volts or ground shorting.
Alarm Input will be activated when low or high state appears, according to
ALARM
menu settings.
Notice: both alarm inputs and outputs are not protected against high voltage induction. Alarm
inputs and outputs should be protected against discharges, which may damage them.
NV-DVR1104/CD, NV-DVR1108/CD and NV-DVR1116/CD are equipped with alarm outputs which
allow for external devices control. Both outputs modes: NO and NC are available. Alarm output load
current can not exceed 100mA. It is possible to connect e.g. LED in order to create circuit, as it is
shown on the scheme below. Additional circuit, with e.g. additional relay, should be used if high power
consumption devices are connected to alarm output.
Multiplexer
ALARM OUTPUT N.O.
External circuit
ALARM OUTPUT COM
Vcc
LED
R
input 1
GND
External connector
(e.g. reed-relay)
Multiplexer
ground
ground
External circuit
