Aver SF2012H series quick guide User Manual download pdf (Page 19)

4. I/O Control Instruction

I/O terminal connector – used in application, for e.g., motion detection, event triggering, alarm

notifications. It provides the interface to:

 Digital Input (GND+Alarm) : An alarm input for connecting devices that can toggle between an

open and closed circuit, for

1. GND (Ground) : Initial state is LOW

2. Alarm : Max. 50mA, DC 3.3V

Example: PIRs, door/window contacts, glass break detectors, etc. When a signal is

received the state changes and the input becomes active.

 Relay output (COM +N.O.) / (COM+N.C.) : An output to Relay switch, for example: LEDs,

Sirens, etc

1. N.C. (Normally Close): Max. 1A, DC24V or 0.5A, AC125V

2. COM: (Common)

3. N.O. (Normally Open): Max. 1A, DC24V or 0.5A, AC125V

[Example]

RELAY INSTALLATION EXAMPLE 1

Trigger a “Normal OFF” (Normal Open) alarm siren on when event/motion occur:

ALARM IN

RELAY OUT

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 32 33

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Aver SF2012H series quick guide User Manual Page 19