Cisco VC 220 Administration Manual page 17

Getting to Know the Cisco VC 220 Network Camera
Parts of the Camera
VC 220 Dome WDR Day/Night PoE Network Camera Administration Guide
Ports 3 and 4 are for input devices such as PIR sensors or window or door
sensors. The digital input is triggered when the sensor opens or closes the circuit
between pin 3 and pin 4 (dependent on whether your input sensor is normally an
open or closed device).
The state of your input device determines how to configure the ports on the
Camera Control > I/O ports page found on
closed, set the configuration of Triggered When to Low. Set the output port to
Open. For input devices that are normally open, set the configuration to High and
Open.
See also Configuring the GPIO Ports, page 96
page 62. If the input device is normally
for a sample configuration.
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