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No.

Port Name

ALARM_IN

ALARM_OUT

ALARM_GND

1.2 Connecting Alarm Input/Output

The camera can connect to external alarm input/output devices through the digital input/output

port.

Alarm input/output is available on select models.

Step 1

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

The device collects different statuses of the alarm input port while the input signal is idling

and being grounded.

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

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

Step 2

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

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

● Mode A: level application. The alarm outputs high and low level signals, and the alarm

outlet is OD, which requires external pull-up resistance (10 K Ohm typical) to work. The

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

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

switches to low- level when an alarm is triggered (As long as the operating current is

below 300 mA, the output low-level voltage is lower than 0.8 V).

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

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

than 12 V, please use an additional electric relay.

Port name

Description

Includes alarm signal input and output ports, the number of

Alarm I/O

I/O ports might vary on different devices.

Table 1-2 Description of alarm I/O port

Description

Receives the switch quantity signal of external alarm sources.

Outputs alarm signals to alarm devices.

Ground connection.

Figure 1-2 Alarm input

Quick Start Guide