ACTi A21 - Page 9

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Hardware Manual
9
Physical Description
Item
Description
1
DC 12V Power Input
In case the camera is connected to a non-PoE
(Power over Ethernet) switch, use this connector
to connect the camera to an external power
adapter (not included) to power up the camera.
This connector can also be used to power up a
digital output device.
Digital Input / Output
(DI/DO)
This connector connects to digital input or output
devices, such as an alarm trigger, panic button,
etc. Digital Input (DI) and Digital Output (DO)
devices are used in applications like motion
detection, event triggering, alarm notifications,
etc.
Audio Input / Output
This connector connects to audio input and output
devices, such as microphones and speakers.
Serial Port
Connects to a serial port device, such as a PT
scanner (sold separately), using the RS-485
protocol. Use the supplied terminal block to
connect the wires from the serial device to the
camera.
2
Ethernet Port
Connects to a network using an Ethernet cable.
3
Video Output
Connects to an analog video output device with
BNC connector.
NOTE: Not available on A28, A29, A213 models.
4
Memory Card Slot
Insert a memory card into this slot for local
recording purposes. . See How to Install /