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VIVOTEK
User's Manual - 7
DI/DO Diagram
DI-
DO+
DI+
DO-
External
power source
VDC
Switch
BJT transistor
Relay
AC
Source
NO NC
External
device
DI-
DO+
DI+
DO-
VDC
Switch
BJT transistor
Relay
AC
Source
NO NC
External
device
1. The DO+ pin provides different output voltages depending on the camera model, 12V for
this model, and the max. load is 50mA.
2. The max. voltage for DO- pins is 80VDC (External power).
In order to control AC devices, the above diagram can be taken in consideration. The
diagram uses a relay to control the ON/OFF condition of the AC device.
3. An external relay can be triggered by using DO+ or by an external power source,
depending on the type of relay you use.
4. In case of using an individual relay (instead of using a relay module), for protection
against voltage or current spikes, a transient voltage suppression diode must be
connected in parallel with the inductive load.
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