Encoder Hardware Manual
18
Connecting the Digital Input/Output Devices (Optional)
Depending on your surveillance needs, you may connect digital input / output devices to your
encoder.
Digital Input (DI) devices can be used to notify the encoder about an activity in the camera or the
encoder site. DI can be triggers of events. For example, you can connect a “panic button” to the
encoder; as such when the panic button is pressed, the alarm signal will be sent through the
encoder. Other common DI device applications are emergency button, smoke detector, passive
infrared sensor, etc.
Digital Output (DO) devices are external devices that are activated by the encoder upon an event
within the encoder (e.g. memory card removed, etc.) or triggered by motion in the camera site
among others. For example, you can connect an “alarm horn” to the encoder; as such when an
event occurs on the camera side (e.g. detected intruder), the alarm horn will sound. Other
common DO device applications are motion-triggered lights, electric fence, magnetic door locks,
etc.
How to Connect DI/DO Device to V21 / V22
1. Press and hold the orange tab as you insert the wire through the pin slot, then release the
orange tab to secure the wire.
2. To connect digital input / output devices (DI/DO), map the pins to one of the pin combinations
below:
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