Connection
Matrix
Co m p uter
（
DVR
）
2.6 Connect the keyboard in the system
The user can use the keyboard to control the alarm
box, and to connect the dome via the alarm box. Please
see the alarm box user manual for more details regarding
the connections. Every alarm box only can connect to
one dome camera.
The keyboard can control the matrix, and control
the domes indirectly by the matrix (see Picture2-6.1).
When the keyboard is not connected to the matrix, it
connects to a computer (DVR), and controls the dome
(see Picture2-6.2); or the keyboard can also control the
dome directly without DVR.
Several keyboards and dome cameras can be
connected in parallel, and access RS485 bus line. Each
keyboard can control a dome independently. Working in
this mode requires the user to set a main keyboard (the
main keyboard ID is set to 1), and the Baud rate of the
keyboard is set to 9600bps (see Picture 2-6.3).
Keyboard
Do m e 1
Do m e 2
Picture 2-6.2
In the previous pictures, the connections between
keyboard and keyboard or between keyboard and
computer are all via RS232, however, when the distance
between devices is more than 20m, it is suggested that
RS485 should be used.
Keyboard
Dome 1
Dome2
Picture 2-6.1
1.
Using one RS485 cable enables the user to
control up to 32 pieces of equipment. With
that being said, a keyboard can directly control
up to 31 domes.
NOTICE
2.
The system may have up to 4 keyboards
simultaneously, and each keyboard holds a
different ID.
Keyboard1
Keyboard2
Keyboard3
Dome1
Dome2
Dome3
Dome4
keyboard4
Dome5
Dome6
Dome7
Dome8
Picture 2-6.3
