12 APPENDIX
12.1 Keyboard Command Table for Dome
12.2 Keyboard Connection
1 DIP Switch
Bit1--Bit5 are to set different connections.If keyboard is con-
nected to matrix, set Bit1--Bit5 as "OFF"; othe rwise set Bit1--
Bit3 as "OFF" and set B it4--Bit5 as "O N" (for one key board or
several keyboards without connection to matrix).
Bit6- -Bit8 are for termination impedance settings. Use r can
set them as required: If Bit6 is set as "ON", termination imped-
ance is co nnected to RS485 Bus (A1--B 1).If Bit7 is set "ON",
termination impedance is connected to RS485 Bus (A2--B2);
If Bit8 is set as "ON", termination impedance is connected to
RS485 Bus (A3--B3).
NO TE: Sw itc h po w e r o ff be fo re the abo ve se ttings.
2 RS485 connection port
3 groups o f RS485 output (A1-- B1, A2--B2, A3--B3); A2--B2 is
for controlling dome.
D
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me
C
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mm
a
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3 Power port
It is for DC9V power supply connection. Refer to Picture 2 for
the "+"& "-" polarity position.
NTO E: Wh e n the m atrix k e y bo ard is c o nn e c te d to
the m atrix, po w e r is sup plie d to the ke y bo a rd by
th e m atr ix. Th e re is no n e e d to c o nne c t po w e r
supply to the po w e r po rt o f the ke y bo ard.
4 Matrix-keyboard connection port
This port is for the connection betwe en the m atrix and the
keyboard.
5 RS232 port (Consol)
It is fo r PC c onne ctio n to c ontrol e quipme nts such as
multiplexer.
