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AXIS 243Q Blade - I/O Terminal connector
RS-485 COM port
The RS-485 COM Port supports several operational modes:
• Generic
TCP/IP - enables the video server to receive status/data and send com-
mands via TCP/IP
• Generic
HTTP - enables the video server to receive status/data and send com-
mands via HTTP
• P
an Tilt Zoom (PTZ) - for controlling a PTZ device. A PTZ device requires a driver
for its function. Drivers can be obtained from www.axis.com. Please see page 25
for information on how to connect PTZ devices.
While the RS-485 can be used to connect a PTZ dev
ice, it is necessary that the device’s
protocol supports ‘daisy chaining’ in order to connect and control more than one camera
(up to four).
Chaining the units allows them to share a single
serial port. The protocol then decides
which unit to address and sends commands to it specifically. The diagram below explains
how the devices are connected.
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485