Connection
2.
Keyboard Connections
2.1
Interface instructions
AV-3106
is
equipped
with
all
kinds
of
communication interfaces: RS232
,
RS422
,
RS485
,
RJ45. The user can find them on the back of the
keyboard. With proper connections, this keyboard can
control target devices.
2.1.1
RS485 and RS422 interfaces
RS485 and RS422 interfaces are 6-bit ribbon cable
connections on the keyboard. RS485
（
A+, B-) can be
used to connect a dome, in order to control the dome
directly with the keyboard. RS485
（
A+, B-
）
can be used
to connect to a DVR or other keyboard when the dome is
controlled via matrix. RS422 (T
＋
, T
－
) is the “sending
signal” mode, while RS422 (R
＋
, R
－
) is the “receiving
signal” mode, and both modes can be used to connect to a
matrix, DVR and so on.
2.1.2
Power supply port
The power supply port is used to connect the
keyboard to 9V-12V DC/AC power. The keyboard itself is
equipped with an adaptor which converts 230VAV to
9VDC.
2.1.3
EIA RS232 interface
EIA RS232 interface is used to expand the
functions to control the menu handler, DVR, PC and so
on.
2.1.4
RJ45 interface
RJ45 interface is the standard network interface
which is mainly used for connecting the matrix for short
distance use (less than 7.6m). For more details, please
see “2.3 Matrix connections
”
.
2.2 DIP switch settings
There is an 8-bit DIP switch on the back of this
keyboard. Among the 8 bits, 1-7 bits are invalid, and the
8
th
bit is for end-of-line resistance
(120Ω)
setting for
RS485 bus line. When the 8
th
bit is set to “ON”, it
means the end-of-line resistance has been connected into
the system. For more RS485 (A
＋
, B
－
) bus line setting
information, please see “5.1 RS485 bus line
knowledge
”
.
Picture 2-1.1
DIP
1 2 3 4 5 6 78
RS232
RS485 RS 422
RJ45
AC/DC 9V-12V
OFF
ON
A+ B- T+ T- R+ R-
DIP Switches EIA RS232
Interface
6-bit Ribbon Cable
Connection
RJ45
Power Supply Port
Picture 2-1.2
