Vivotek Supreme SD9374-EHL User Manual page 8

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.
Dry contact and using camera's DO+ to supply a relay.
DI-
DO+
DI+
DO-
PE
Switch
DC 0V
External DC power
DC
NC
NO
Relay
External Device
Switch
NC
NO
Relay
External Device
External AC power
with Protected Earth
AC
PE
External AC power
with Protected Earth
AC
PE
VIVOTEK
User's Manual - 8