VIVOTEK
22 - User's Manual
DI-
DO+
DI+
DO-
Switch
External Device
External DC power
Dry contact with external DC power source to supply a relay. Dry contact is the safest connec
ti
on
to protect devices.
NC
NO
Relay
Photo
Coupler
DC
DC 0V
DC 0V
External AC power
with Protected Earth
AC
PE
PE
DI-
DO+
DI+
DO-
Switch
External Device
External DC power
Wet contact with external DC power source to supply a relay.
NC
NO
Relay
DC
External AC power
with Protected Earth
AC
PE
PE
DC 0V
1. The DO+ pin (5V) provides 5V±10% output voltages, and the max. load is 50mA.
2. The max. voltage for the 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.
DI/DO Diagram
