Vivotek CaMate CM48 Series Installation Manual page 15

Coordination with Cameras via the DI and DO Pins
+3.3V +3.3V
R
R
R
GND GND
+3.3V
R
Fuse/50mA
GND
IR LED ON/OFF control (Green & Yellow wires)
This mode means that CaMate illuminator On/Off control is triggered by camera or other alarm system.
User can decide using the appropriate dry/wet contacts depending on wiring condition.
DI+: Green = TTL + voltage
DI-: Yellow = TTL – voltage (GND)
* Dry contact
Logic level 1 (Open) = LED off
Logic level 0 (Close to GND) = LED on
* Wet contact
Logic level 1: 4V~40 V = LED off
Logic level 0: 0.8V MAX = LED on
DI+
DI-
GND
DO+
DO-
GND
Switch
NO NC
Relay
15
External
power source
Camera DI pins