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VIVOTEK
DI/DO Diagram
Dry contact with external DC power source to supply a relay. Dry contact is the safest connection
to protect devices.
DI-
DO+
DI+
DO-
PE
Wet contact with external DC power source to supply a relay.
DI-
DO+
DI+
DO-
PE
1. The DO+ pin provides 5V output voltage, and the max. load is 50mA.
2. The max. voltage for DO- pins is 30VDC (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.
8 - User's Manual
Switch
Photo
Coupler
DC 0V
NC
NO
Relay
External Device
Switch
NC
NO
Relay
External DC power
DC
External AC power
DC 0V
with Protected Earth
AC
PE
DC 0V
External DC power
DC
External AC power
with Protected Earth
AC
PE
External Device
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