7.3 Matrix-Keyboard Connection Configuration
Note: pay attention to the following when conducting ma-
trix-keyboard connections.
1.
The matrix system can connect 4 matrix keyboards and the
connec tion can be extended to 8 keyboards (refer to the
next section for details).
2.
Set all the bits of the DIP switch of the matrix keyboardas OFF.
3.
When the matrix keyboard is conne cted to the matrix, the
RS485 signal is transmitte d to the key board by the matrix.
There is no need to connect RS485 signals separately to the
RS485 port of the keyboard.
4.
When the matrix keyboard is conne cted to the matrix, the
power is supplied to the keyboard by the matrix. There is no
nee d to connect pow er supply to the pow er port of the
keyboard.
5.
The ID address of the keyboard must be the same with the
number of the connecting port to the matrix (the numbers
are silkscreened on the back panel of the matrix). Port no.1
has the corresponding keyboard ID addresses 1 or 2; port
no. 2 has the corresponding keyboard ID addresses 3 or 4;
port no.3 has the corresponding keyboard ID addresses 5 or
6; portno. 4 has the corresponding keyboard ID address 7 or
8.
7.4 Extended Keyboard Connection Configuration
Note : pay attention to the following when co nducting ex-
tended keyboard connections.
1.
Eac h matrix keybo ard can only c onnect one extended
keyboard;
2.
Connect the matrix keyboard with the matrix directly with the
matrix-keyboard connection line;
3.
Connect the A2, B2 ports of the RS485 socke t group in the
extended keyboard with the A2, B2 ports of the RS485 socket
group in the matrix keyboard correspondently;
4.
The power po rt of the extended keybo ard should be con-
nected to DC9V power supply separately;
5.
The ID addre sses of each group of m atrix ke yboard and
extended keyboard must be different.
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DR-3207 Matrix Controller
Matrix Keyboard
Matrix Keyboard
Matrix-keyboard Connecting Line
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Extended Keyboard
2#, 4#,6#, 8#
Matrix Keyboard
1#,3#, 5#, 7#
RS485 Bus
Matrix-keyboard Connecting Line
Connecting Matrix
Power Supply DC9V
