7
2.1 Interface instruction
RS485 interface is on the two green terminal seats of the keyboard connection lines.
In the keyboard directly controlling mode
，
RS485
（
A+
，
B-
）
Collects Dome Cameras
；
In
the matrix controlling mode, RS485 can collect other Keyboards.
Transfer RS485 interface to RS485-USB converters
（
picture 2-1.1
）
, then insert it into the
USB interface of the Keyboard. So when using NKB built-
in computer’s related monitoring
software, it will be more convenient to use the keyboard rocker to control monitoring
equipment.
VGA input interface is used for taking the keyboard as a display device. The keyboard can
insert equipments with VGA output like PC host and DVR. The maximum input resolution
it supports are 1024X768,800X600
。
USB interface, used for PC host communication, it is connected to PC host via USB. At
this time the keyboard can be used as Mouse equipment. And the Video Input Interface on
the keyboard is used for receiving camera’s video signal externally.
2.2 Connect to matrix
The keyboard can control PELCO CM6700, CM6800 matrix. Here below taking keyboard
USB
A+
RS485
B
—
USB connecter
Figure 2.1
Figure 2-1.1