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2. 3 Alarm Connections
2. 3. 1 ALARM INPUT
Connect up to 16 alarm sensors (ZR-
DH921NP : 9 alarm sensors) using the
supplied terminal blocks.
GND
1 2 3 4 5 6 7 8
GND
9 10 11 12 13 14 15 16
ZR-DH1621NP
ZR-DH921NP
SW
SW
SENSOR IN
Notice
Each ALARM IN should be connected
with GND which is grounded by TTL or
contact point. Components z
8
GND
1
2
3
4
GND
5
6
7
8
COMMON GND
2. 3. 2 ALARM OUTPUT
Connect up to 4 separate alarms to the
Alarm Output.
Alarm may be triggered by numerous events
including digital motion detection, Full Disk,
Signal Loss, Power Off, Network Access.
The signal state is adjustable to N/O
(Normaly Open) or N/C (Normaly Closed).
9
GND
1
Notice
The internal switching relays are rated
for up to 24V at 1.0A maximum.
Damage may occur if current is
DC
GND
higher!
2
3
4
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