Hardware Manual
29
Connecting Input / Output Devices (Optional)
Depending on your surveillance needs, you may connect digital input / output, audio input / output,
and video output device to your camera.
How to Connect DI/DO Devices
To connect digital input / output devices (DI/DO), map the pins to one of the pin combinations
below:
Device
Mapping Instructions
Digital Output
(DO)
DO
Connect the wires of the output device to
DO
and
5V
.
5V
Digital Input
(DI)
DI
Connect the wires of the input device to
DI
and
GND
.
GND
The table below shows the DI/DO connection specifications:
Device
DI
Connection design
TTL - compatible logic levels
Voltage
To trigger (low)
Logic level 0: 0V ~ 0.4V
Normal (high)
Logic level 1: 3.3V
DO
Connection design
Transistor (Open Collector)
Voltage & Current
5V DC, < 50mA
Typical Connection
Based on these specifications, if the DI
device has a voltage of 3.3V or the DO
device has a voltage of 5V (< 50mA), then
the camera can supply internal power to
these devices and there is no need to
connect the DI/DO device to an external
power source.
In this case, wire connection to Pins 1 to 4.
Use the
GND
and
DI
pins to connect a DI
device and use the
5V
and
DO
pins to
connect a DO device. See wiring scheme
below:
Summary of Contents for B-57-V-2
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