D-Link DCS-3430 User Manual page 60

Section 6 - DI/DO
Connect to an IR illuminator or other device in parallel connection.
12V+/12V-
The total output current should be under 200mA.
Receive signals from a motion detector or any other external
DI
security device.
DO Connect to an alarm or buzzer. Refer to page 43.
Connect to the RS-485 interface for controlling auxiliary equipment
485+/485-
such as an external camera enclosure to perform PAN and TILT
movement. Refer to page 48 for more information.
D-Link DCS-3411/3430 User Manual 60