Dahua H Series Manuel de démarrage rapide - Page 8

Parcourez en ligne ou téléchargez le pdf Manuel de démarrage rapide pour {nom_de_la_catégorie} Dahua H Series. Dahua H Series 19 pages. Ir bullet network camera
Également pour Dahua H Series : Manuel de démarrage rapide (20 pages), Manuel de démarrage rapide (20 pages), Manuel de démarrage rapide (19 pages)

No.

Port Name

DC 12V

1.2

Connecting Alarm Input/output

Alarm input/output is available on select models.

Step 1

Connect alarm input device to the alarm input end of the I/O port. See Figure 1-2.

Device collects different states of alarm input port when the input signal is idling and

grounded.

Device collects logic "1" when input signal is connecting to +3V to +5V or idling.



Device collects logic "0" when input signal is grounded.



Step 2

Connect alarm output device to the alarm output end of the I/O port. The alarm output is

open-drain output, which works in the following modes.

Mode A: Level application. Alarm outputs high and low level, and the alarm outlet is OD,



which requires external pull-up resistance (10K Ohm typical) to work. The maximum

external pull-up level is 12V, maximum port current is 300mA and the default output

signal is high level (external pull-up voltage). The default output signal switches to low

level when there is alarm output (As long as the operating current is below 300mA, the

output low level voltage is lower than 0.8V).

Mode B: Switch application. Alarm output is used to drive external circuit, the



maximum voltage is 12V and the maximum current is 300mA.

Mode C: Switch application. If the voltage is higher than 12V, use an additional electric



relay. Note that a diode needs to be connected to the relay, for protection against

voltage transients.

Description

Inputs 12V DC power. Be sure to supply power as instructed in

the manual.

Device abnormity or damage could occur if power is not

supplied correctly.

Figure 1-2

Alarm input

Quick Start Guide