Alarm Output - Dahua Technology IVSS User Manual

3.4.1.4 Alarm Output

● The alarm output is on-off output (Normally Open Contact), and there should be external power
supply to alarm output device.
● RS-485 A line and B line: connecting the A line and B line on the PTZ decoder.
● To avoid overload from damaging the Device, see the parameters about relay.
Model
Contact material
Rated value (resistance load)
Insulation
Insulation voltage
Turn-on Time
Turn-off Time
Life
Figure 3-13 NC alarm input connection
Table 3-3 Relay parameters of alarm output port
Mechanical
Electrical
HRB1-S-DC5V
Silver
Rated power
24 VDC 2A, 125 VAC 2A
capacity
Maximum
62.5 VA/30 W
power
Maximum
power 125 VAC, 60 VDC
voltage
Maximum
power 2 A
current
Between
1000 VAC 1 minute
contacts
Between
contact and 400 VAC 1 minute
loop
1,000 MΩ (500 VDC)
< 5 ms
< 5 ms
300 times per minute
30 times per minute
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