Vivotek IB9371-HT User Manual page 7

DI/DO Diagram
DI-
DO+
DI+
DO-
BJT transistor
DI-
DO+
DI+
DO-
BJT transistor
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.
VDC
Switch
External
power source
NO NC
Relay
VDC
Switch
NO NC
Relay
AC
Source
External
device
AC
Source
External
device
User's Manual - 7
VIVOTEK