Digital Input or
DI is the pair of pins in the camera’s terminal block through which it is possible to connect an external device (a switch or some kind of sensor) with the camera, allowing the external device to notify the camera about an activity in camera site. For example, it is possible to connect a
“panic button” with the camera, and when the button is pressed then the alarm signal is sent through the camera all the way to the control center. You can think of the devices that are connected to DI as the triggers of events.
Digital Output or
DO is the pair of pins in the camera’s terminal block through which it is possible to connect an external device with the camera. That external device can be activated by the camera upon an event inside the camera or by the command from the control center. For example, an
“alarm horn” is a typical device that can be connected to camera’s Digital Output. You can think of the devices that are connected to DO as the responders to events.
The features of DI and DO are sometimes shortly referred to as DIO or DI/DO.
The full document is provided in pdf format and it contains the following:
- Introduction
- The Benefits of DI and DO
- Applications of Digital Input
- Applications of Digital Output
- Applications of Combined Digital Input and Digital Output
- Connection Types of DI and DO
- Connection Types of ACTi Devices
- Video Clips of DI and DO Integration with NVR
- Examples of DI and DO Connections
- Reference: Table of All Connection Types
- Reference: Important Terminology
Reviewed on 2012.05.18: The list of DI/DO supported ACTi devices was updated.
